Krystal Biotech Inc

NASDAQ:KRYS

Earnings Call Transcript 2024-Q1

[Operator]

Thank you for standing by, and welcome to Krystal Biotech's First Quarter 2024 Earnings Conference Call.

[Operator Instructions]

As a reminder, today's conference is being recorded. I would now like to hand the conference over to your host, Stephan Packet, Vice President of Corporate Development. Please begin.

[Unknown Executive]

Good morning, and thank you all for joining today's call. Earlier today, we released our financial results for the first quarter of 2024. The press release is available on our website at www.krystalbio.com. We also filed our earnings 8-K and 10-Q with the SEC earlier today. Joining me today will be Krish Krishnan, Chairman and Chief Executive Officer; Suma Krishnan, President of Research and Development; Jennifer McDonough, Senior Vice President of Patient Access Analytics and Operations; Christine Wilson, Senior Vice President and Head of U.S. Sales and Marketing; and Kate Romano, Chief Accounting Officer.

This conference call will and our responses to questions may contain forward-looking statements. You are cautioned not to rely on these forward-looking statements, which are based on current expectations using the information available as of the date of this call, and are subject to certain risks and uncertainties that may cause the company's actual results to differ materially from those projected. A description of these risks, uncertainties and other factors can be found in our SEC filings. With that, I will turn the call over to Krish.

[Krish Krishnan, executive]

Thank you, Stephane, and thank you all for joining Crystal's conference call. I'm pleased to share that the momentum in 2023 continues with a strong start to 2024, driven by excellent execution across all parts of our business, commercial, clinical and manufacturing. [indiscernible] is reaching more and more patients by the day and is rapidly changing the treatment paradigm for patients suffering from this debilitating disease, dystrophic epidermolysis bullosa or DEB.

Increasingly, debt patients are able to benefit from the durable wound healing afforded by VYJUVEK through a fundamental genetic correction and also the convenience of being administered at home as a topical chair. As real-world experiences with Visit grows, it has been immensely rewarding to hear and see the improvements that patients have made while on therapy. As you will hear this morning, our U.S. commercial launch continues to progress very well, driven by robust demand, rapid growth in reimbursement approvals and high patient compliance. We're also moving quickly towards launching VYJUVEK outside of the U.S. We recently successfully completed the efficacy portion of our open-label extension study in Japan -- put us on track to file with the Japanese regulators before year-end. This will be our second ex U.S. filing after submitting to the EMA last year.

Global infrastructure build-out is underway in anticipation of commercial launches in both Japan and Europe next year. At the same time, we are building momentum across our clinical pipeline. With accelerating enrollment and new trial starts setting us up for a wave of data readouts starting later this year. With the recent initiation of [ KYANITE-1, ] our study evaluating inhaled KB40707 for treatment of solid tumors of the lung. We now have 5 active clinical trials and points to add a sixth ophthalmic B-VEC in the second half of this year. We expect that these studies, which span multiple tissues and target both rare and common diseases will showcase the breadth and power of our proprietary HSV-based gene delivery platform.

We also continue to build out our manufacturing infrastructure in support of global VYJUVEK commercialization and pipeline expansion, including scale-up of our current approved manufacturing process, ongoing process improvements, an initiation of a tech transfer of our current production process to Astra later this year to increase VYJUVEK yields and margins. Finally, I want to highlight that strong execution in our launch did another profitable quarter for Krystal, even while accruing for previously settled litigation payments. And excluding litigation payment accruals, EPS this quarter would have been $0.47 per share, up sequentially from $0.31 per share in the last quarter of 2023. With a strong balance sheet, growing revenues and 2 commercial skill GMP facilities, we have the resources we need to execute on our long-term growth plans and to continue building shareholder value through VYJUVEK and our clinical pipeline.

Before jumping into our VYJUVEK update, it's my pleasure to introduce Christine Wilson and Jennifer McDonagh, 2 senior U.S. commercial leaders at Krystal who are joining me today on the call. Christine recently joined Krystal as Senior Vice President and Head of U.S. Sales and Marketing. She brings over 20 years of experience in specialty and rare disease launches and is an expert in patient finding having previously launched multiple rare disease products with a community focus, including GATX and ultra-rare condition of short double syndrome and more recently, [indiscernible] for IDA and nephropathy.

Jennifer McDonagh is Senior Vice President of Patient Access, Patient Services, Analytics and ops at Krystal and has been instrumental in achieving the broad access and compliance we have today for VYJUVEK. Jennifer has over 25 years experience in biotech and specialty pharmacy with a focus on rare diseases. We are fortunate to have them both on the team.

Now turning to our results. Net VYJUVEK revenues for the quarter came in at $45.3 million. Looking back over our first 3 quarters since launch, total net VYJUVEK revenues now exceed $95 million, keeping us on pace with the top tier of recent rare disease launches. We're especially pleased to be reporting revenue growth Q-over-Q in spite of the onetime headwinds that we faced to start 2024 due to the permanent take-out switch. While the permanent J code is a huge tailwind for reimbursement, the switch negatively impacted revenues on time in the first quarter. In order to ensure continuity of therapy, we bridged patients with free vials. In total, we estimate that approximately 400 free vials were dispensed in 1Q as a result of onetime disruptions. That said, the [ J-code ] issue requiring bridging patients with free drug is resolved and the fundamentals of the launch look very good for the remainder of 2024.

We are confident in our ability to meet, if not exceed 2024 net revenue projections. Cristina and Jennifer will elaborate more in their sections. Gross margins were 95% for the quarter, up 2 percentage points over last quarter. We continue to expect margins to be above 90% in the coming quarters, gradually improving to over 95% in a couple of years. Gross to net adjustments in the first quarter were 14% in line with the previous quarter. Our long-term guidance on gross to net is unchanged, and we expect it will settle into the high teens, reflecting a roughly even split of debt patients between commercial and government plans. Please note that the net VYJUVEK revenues reported today also include an approval for patients on contracted commercial plans who are projected to potentially hit the cap of $900,000 gross per patient per calendar year in 2024.

Overall, I'm really pleased with the growth in the underlying drivers of our commercial launch and will now hand the call over to Jennifer to share additional details on the launch including recent successes in securing patient access to [indiscernible]. Jennifer?

[Unknown Executive]

Thank you, Krish. Moving to Slide 5. It has been exceptionally rewarding to lead patient access and Krystal Connect team in support of this transformational product with hundreds of U.S. patients now benefiting from access to VYJUVEK we really are changing the treatment paradigm for this terrible disease. Commercial and Medicaid access continues to improve for VYJUVEK. We now have received positive policies or decisions for roughly 96% of all covered lives. This is up from over 93% in our last report and driven mostly by an additional 7 state Medicaid programs, including Texas now providing coverage for VYJUVEK following the issuance of the permanent J code earlier this year.

As we entered the first quarter, we were prepared for the challenges of January insurance verification season and the VYJUVEK permanent J-code reauthorization process. So we are very proud of the team's success in supporting continuing coverage for existing patients. At the same time, new patient conversions continue to progress well. And as of April, we have secured over 330 patient reimbursement approval. We did see a onetime impact to our overall reimbursement approvals in Q1 due to a cybersecurity incident affecting our specialty pharmacy provider, but this has now been resolved. This incident is not unique to us and affected many of our other colleagues in the pharmaceutical industry.

With strong payer access, the permanent J code assigned and ongoing operational improvements, the team is laser focused on patient experience and optimizing time to first VYJUVEK application. With that, conversion times continue to shorten, albeit at a slower pace than we previously expected. As patients are increasingly identified in the community setting, where physicians are a bit less familiar with dystrophic EB and the reimbursement process for rare disease medicines. We are finding that additional support is needed to navigate these patients and their physicians to access. This is, of course, exactly what Krystal Connect patient services team is built to do. And we work -- as we work through each patient case we are seeing great results and ultimately authorizations for VYJUVEK therapy.

We continue to implement additional education and tools to support the process and are still on a trajectory for conversion times to compress down to under a month later this year. With most VYJUVEK reimbursement approvals covering an initial treatment period of 6 months or more. We have still not encountered a large number of reauthorizations, but same as last quarter, all reauthorizations to date have been either approved or in process. As we move to Slide 6, the split between our DEB and DDA patients at the reimbursement level is roughly in line with the start form split we reported previously and consistent with the steady progression through the conversion. We are also very happy to report that we are seeing reimbursement approvals across all ages as we continue to communicate to patients, physicians and payers that all [indiscernible] matter and it is never relate to change the course of this disease.

At the same time, it is also encouraging to see strong uptake in the pediatric segment where establishing corrective therapy early has the potential to change the trajectory of these patients' lives. Moving to Slide 7. Moving to the patient experience and compliance. We continue to report strong patient preference for at-home administration with 97% of the weekly treatments occurring in the patient's home. And even with the increase in both the patient base and average length of therapy, we are pleased to report that compliance to weekly application remains above 90%, particularly when compared against many other chronic therapies, with compliance rates often around 50%, which we believe is a reflection of the clinical benefit VYJUVEK is bringing to patients [indiscernible] on drug.

Although our work is just beginning, I am proud of the progress our team has made to date rapidly growing the number of patients accessing VYJUVEK and once started ensuring they are able to treat their wounds conveniently at home. I will now hand it off to Christine to talk about what comes next for our U.S. VYJUVEK launch.

[Unknown Executive]

Thank you, John. I'm incredibly excited to have joined Krystal and to build on the great early momentum we are seeing in the VYJUVEK launch. I know firsthand the challenges that come with launching a rare disease medicine in the community setting. Patients are often undiagnosed or lost a follow-up. Genetic tests have never been run. Familiarity with innovative therapies and navigating reimbursement is low. And sadly, disillusionment with the health care system is all too common. Even if you would expect a patient suffering from a severe disease to proactively seek care, many of these patients have been disappointed by their treatment options in the past and have disengaged.

However, none of these issues are unique, and we have at our disposal, an extensive toolkit to help find and activate rare disease patients wherever they are in the U.S. We are also starting from a strong position with great early adoption of VYJUVEK , giving us plenty of success stories to amplify and disseminate. Today, I would like to touch on some of the key strategic initiatives, which we are pursuing to drive sustained long-term growth of VYJUVEK in the U.S. Our commercial efforts can be grouped together into 3 main pillars. The first is data analysis. Our analytics hub includes real-time claims alerts to identify potential patients. Through this data, we can quickly deploy our seasoned rare disease sales team, while in parallel engaging HCPs through nonpersonal promotion.

The combination of these 2 activities drives awareness and education of VYJUVEK to our targeted HCP audience and is already hoping to grow our identified patient pool. There are also future opportunities to expand the scope of our analytics work to include DEB adjacent claims codes on our path to finding all debt patients across the U.S. Importantly, these clean-based patient finding efforts are distinct from our sponsored genetic testing program, DeCoDeb, which has had great uptake and is helping clinicians identify previously undiagnosed patients. Education of HCPs is also a key strategic imperative and is being expanded through peer-to-peer programs by leading KOLs in EB as well as early VYJUVEK adopters. Peer-to-peer educational programs are the most impactful approach of bringing information to new EB treaters and early adopters who do not always practice in major centers bring unique perspectives relevant for potential community prescribers.

With over 5,000 HCPs now having been reached by the sales team, the desire for ongoing education and dialogue amongst the HCP community for better patient outcomes continues to grow. The open-label extension study demonstrating long-term safety, efficacy and durability results will be published in the second half of this year. These top line results were well received during a late-breaker session at the AAD meeting in March. The results solidify VYJUVEK' impact on the DeB patient population and further establishes VYJUVEKsafety profile. Patient engagement is our third top priority. In-person and digital programs are providing the patient community an opportunity to hear real-world VYJUVEK experiences from other patients and their caregivers. This is a powerful approach to establishing understanding and confidence in the benefits of VYJUVEK to the patient community.

Social media has become a powerful tool in reaching patients, particularly those who may not be engaged with a health care team. Targeted ads have been deployed on the most established social platforms, and we're expanding to other social media channels in the second half. An example of one of our social media as is shown here. This approach allows us to engage patients where they're at, raises awareness levels and allows them to engage digitally to learn more and seek treatment. Altogether, by amplifying initial patient and physician experiences with VYJUVEK we expect to drive adoption, build on a prescriber base that is already in the hundreds and deliver on our mission of reaching as many debt patients as possible.

Before handing the call off to Soma for pipeline updates, I will also take the opportunity today to highlight a few trends that we are already seeing in the field that we expect will reinforce VYJUVEK' leadership position in dev and sustain our launch in the long term. First, patients are seeing the compounding benefits of corrective therapy of VYJUVEK as they treat more wounds. Unlike politive approaches, we are able to deliver the Collagen7-A1 gene directly and 2 patient rounds and enable durable wound closure. As patients treat and close more and more wounds, they are increasingly able to get control over their disease. The positive patient experiences are building excitement amongst patients and HCPs.

In addition, thanks to the work of Jennifer's team, home administration is becoming further entrenched as the standard of care for patients with them. Wound care in the home is an established routine for DEB patients and families. Home administration with VYJUVEK integrates into this routine, and we are seeing the overwhelming majority of patients choose it as part of their improved standard of care. Our specialty pharmacy provider and home dosing infrastructure is supporting compliant, ongoing patient progress monitoring and integrating into a patient's lifestyle treatment approach. Momentum continues to grow, familiarity with VYJUVEK is rapidly increasing and positive patient experiences are expanding utilization inclusive of the DDA population. Altogether, we expect these trends to establish by DUC as the standard of care for deb in the years to come. Now I will hand it off to Suma to share pipeline highlights.

[Suma Krishnan, executive]

Thank you, Christine. Our development team has made great progress to start 2024 as we work towards our ultimate goal for treating depth comprehensively and globally, while simultaneously advancing a broader pipeline of reducible genetic medicines for many of the other rare and serious diseases that lack adequate treatment options. With respect to our [ PVAD ] development, steady progress towards European and Japanese regulatory authorization has us on track for launches in both regions by 2025.

In Europe, EMA's review of our marketing authorization application continues. In February, manufacturing facility inspections were completed, and we expect to receive GMP certification in the second half of this year. Based on recent discussions, we believe EMA, like the FDA, is also supportive of home dosing. We continue to expect a decision on our marketing authorization application before the end of the year. In Japan, we have now successfully completed the efficacy portion of our open-label bridging study in Japanese patients enabling us to proceed with the Japanese new drug application, which we expect to file in the second half of the year.

Having previously received orphan drug designation by Japan's Pharmaceuticals and Medical Device Agency, a designation, which confers specific benefits for orphan drug development including priority review application, we remain on a trajectory for both a decision by Japanese authorities as well as launch in 2025. With respect to our broader clinical pipeline, there were 2 major themes in the first quarter, expansion and acceleration with an expanding pipeline and accelerating enrollment we are setting up for a number of exciting data readouts starting later this year.

Our oncology program, KB707 has been progressing rapidly to start 2024. Recall that KB707 is the modified HSV-1 vector designed to deliver genes and [indiscernible] , both IL-12 and IL-2 to the tumor microenvironment and promote systemic immune-mediated tumor clearance. We have 2 formulations of KB 707 in development, a liquid formulation for intratumoral injection and an inhaled formulation from nebulization and lung delivery. Our Phase I study to evaluate intratumor KB707 monotherapy is moving ahead well. Since dosing our first patient in October of last year, we now have cleared the first 2 dose levels in our study and completed enrollment in the third. KB707 has so far been generally well tolerated across a diverse population that includes patients with sarcoma, colon, breast and cutaneous cancers.

No patient has experienced dose-limiting toxicities or drug-related Grade 3 or greater adverse events. Based on the current pace of enrollment, we expect to be able to report interim data before the end of this year. We also recently dosed the first patient in our inhaled KB707 Phase I study [ KNITE1, ] an open-label, multicenter dose escalation and expansion study evaluating InHealth KB707 monotherapy in patients with advanced solid tumor malignancies affecting the lungs. This is another exciting milestone as we look to extend the clinical utility of cytokine therapy and make a new class of medicines to treat a wide range of otherwise difficult to treat solid tumors. It is also gratifying to report that both intratumoral and email formulations of KB707 have now received fast track designation by the FDA and after [indiscernible] KB707 was granted fast track earlier this year for treatment of patients with solid tumors with pulmonary metastasis that are relapsed or refractive to standard of care therapy.

Turning to our respiratory program. We are pleased to report a pickup in enrollment year as well. On KB407, our redoseable inhaled gene therapy for the treatment of cystic fibrosis, we have now completed dosing in Cohort 2 of the [ CORE1 ] study are on track to start dosing in the third and final cohort later this quarter. Recall that this cohort is scheduled to include bronchoscopies that will allow for evaluation of airway epithelial cell transactions and expression of CFTR transcript and protein. Cohort 3 also includes minimum enrollment thresholds for patients that are not eligible for modulators, an important patient population for which no effective disease [indiscernible] Fine therapies exist. KB408, are redoseable inhaled therapy for alpha-1 antitrypsin deficiency. We dosed the first patient in our [ SERPENTYME-1 ] study in February of this year. [indiscernible] is a Phase I open-label single-dose escalation study in adult patients with AATD to allow assessment of safety, tolerability, alpha-1 antitrypsin levels, and key pharmacodynamic biomarkers.

With strong support from the Alpha 1 research community, we are on track for an interim data readout before the end of 2024. Our development activities in ophthalmology are also ramping up, working towards our goal of treating DEB comprehensively. In February, we disclosed that we had reached alignment with the FDA on single-arm open-label study to enable approval of B-VEC eye drops for the treatment of lesions in the eye of DEB patients. We have since initiated clinical operations to enable the study start in the second half of the year. And finally, we look forward to reporting results from Cohort 3 and 4 of our KB301 Phase I study later this year. Both cohorts are running concurrently to evaluate KB301 in 2 potential target indications. Improvement of the lateral canthal lines at rest and improvement of dynamic [ wrinkles ] of the [indiscernible]. Following readouts from Cohort 3 and 4, we expect to select a single indication for Phase II development.

Our HSV-1 platform has the potential to yield a large number of highly differentiated redoseable gene therapies. We look forward to making continued progress in 2024 and sharing data updates on our clinical pipeline later this year. With this, I would like to turn the call to Kate.

[Kathryn Romano, executive]

Thank you, Suma. We ended the first quarter with $359 million in cash on hand and $622.3 million in total cash and investments. an increase over year-end cash and investments of about $28.1 million. VYJUVEK net product revenue for the quarter was $45.3 million. As VYJUVEK was approved by the FDA in May of 2023, there was no comparative period revenue. Cost of goods sold was $2.4 million for the quarter or about 5% of net product revenue, making gross margin 95%.

In the first quarter of 2023, costs associated with the manufacturing of VYJUVEK were expensed as research and development costs prior to approval, and therefore, there are no comparative period costs in the first quarter of 2023. Research and development expenses for the quarter were $11 million, inclusive of stock-based compensation of $1.9 million compared to $12.3 million for the prior year's first quarter, inclusive of $2.5 million of stock-based compensation. Lower research and development expenses in the first quarter of 2024 were due to decreased VYJUVEK manufacturing and overhead costs as following FDA approval, those costs are now recorded as part of our cost of inventory. This decrease was partially offset by additional clinical development costs and R&D-related depreciation expenses.

Selling, general and administrative expenses for the quarter were $26.1 million, inclusive of stock-based compensation of $7.4 million, compared to $24 million for the prior year's first quarter, inclusive of stock-based compensation of $7.9 million. Higher selling, general and administrative expenses in the first quarter of 2024 compared to the prior year's first quarter were primarily the result of increased selling expenses related to the launch of VYJUVEK, in particular, an increase of about $1.5 million related to the additional patient access program related costs that were incurred in light of the J code transition that was previously discussed. Other increases included higher professional services, payroll and other administrative costs, offset by lower marketing-related expenses compared to the prior year's first quarter.

This quarter, we also recorded litigation settlement expense of $12.5 million due to our anticipation of reaching the first milestone payment in the periphegen settlement at $100 million in net product revenues. Our net income for the quarter was $932,000, which represented $0.03 per basic and diluted share. We would also like to reiterate our previously issued guidance of between $150 million to $175 million in combined non-GAAP, R&D and SG&A costs in 2024. As a reminder, this projection excludes an estimate for stock-based compensation. We continue to expect higher research and development costs relating to our several active pipeline projects and higher selling, general and administrative costs relating to the continued launch of VYJUVEK across the United States and our pre-commercial activities in Europe and Japan. And now I will turn the call back over to Krish.

[Krish Krishnan, executive]

Thanks, Kate. If there's one message that I hope you take away from today's call, it is our excitement for the path ahead at Krystal. Our U.S. launch continues to progress very well with high compliance, broad access and a growing number of patient conversions, putting us on an excellent trajectory. Momentum is also building outside of the U.S. with the rapid completion of our Japan OLE and soon to be the second regulatory filing in a major ex U.S. market.

We look forward to further expanding access to VYJUVEK and abroad, all while progressing a deep clinical pipeline addressing urgent unmet needs in rare and serious diseases. Thanks for listening. And I'd like to now open the call for Q&A.

[Operator]

Thank you.

[Operator Instructions]

And the first question today is coming from Alec Stranahan from Bank of America.

[Alec Stranahan, analyst]

Just 2 quick ones for me. First, can you maybe talk about patient compliance that you saw in the quarter? What has the feedback been from the field on this to date? And then I didn't see any mention of new start forms, but any trends here that you would highlight? And I guess what else needs to happen to shorten that time to less than a month for conversion.

[Krish Krishnan, executive]

Thanks, Alec. On your question on compliance, I'm going to turn it over to Jennifer.

[Unknown Executive]

Sure. Thanks, Alec. So when it comes to compliance, we are just thrilled with the patient experience. Overall, patients continue to see the impact of VYJUVEK. And because it's dosed weekly, they understand that it's important to keep up with those weekly doses. That's definitely what we're hearing. With that, they continue -- the home dosing is important for them.

But with that in the time on therapy, there are opportunities to potentially miss a week here or there. So overall, patients are completely I think, aligned with the idea that weekly is important, that the dose is important for wound healing. They're thrilled with the outcomes that they're receiving with and we work with them for flexibility and understanding that life happens and they may miss a weaker here or there. But overall, compliance is just on stellar.

[Krish Krishnan, executive]

Alec, on the start form question, look, we stopped talking about Star farms last quarter. We think reimbursement approvals is a much closer predictor of net revenue than PSF at this stage of the launch. But having said that, demand continues to be really good with respect to patients coming on drug and I'll turn it over to Christine to maybe say a sentence or 2, having come into the story over the last couple of months.

[Unknown Executive]

Yes. Thank you, Krish. Yes, we continue to be very pleased by the volume of new starts we're seeing. And we are beginning to see some of that transition from the COEs into the community base. But as that awareness continues to grow, the education, the clinical experiences, we intend to build on that momentum that we're currently seeing.

[Operator]

The next question is coming from Tim Lugo from William Blair.

[Tim Lugo, analyst]

Krish, I believe you mentioned that you're confident in hitting revenue projections in 2024 despite what was a disruption this quarter given the J-code switch -- can you just talk a bit about the IP consensus around $255 million this year. Is that just something we are generally comfortable with?

[Krish Krishnan, executive]

Look, without getting into the specifics of what I think about is what I see the analysts projecting and the consensus estimate, whether it be average or median realize that 1Q was slight on the revenue side, but not on the fundamentals of the commercial launch, right? When the J-code issue surfaced, 2 things happened. I think our specialty pharmacy probably underestimated the time it would take to convert.

We probably assume that, that was right. But when the actual issue surfaced, because the dosing is at a weekly level, we don't have time to think about what we could have done in the past. We had to jump in quickly provide access to free vials and we ended up spending about 400 free vials, as I mentioned in the call. But by the time we started to learn to figure out how to address such an issue either now or in the future, the issue was well behind us. So it was a very transitory resulted in about 400 free vials, which you can imagine, is about slightly north of $8 million in net revenue.

But we were really pleased that we kept the patients on drug and provide continuity without having to slip up on that front. That's more important to us since patient experience is at the forefront of what -- of this launch before over everything else in the story. But Tim, coming back to your question, we feel good about generally where we think we're going to end up in 2024.

[Tim Lugo, analyst]

Understood. And maybe switching to the pipeline a bit for KB407. The third cohort is about to get enrollment. Can you narrow down when we should expect first data coming out of the study given the first 2 cohorts are behind us now? And is there -- are there any trends maybe in the second cohort that make you more or less confident in the program?

[Suma Krishnan, executive]

This is Suma. I'm going to take that question. I mean, again, we are very excited about KB407. We are working with 2 sites because remember, we need sites that have the capability to do bronchoscopy because this is a procedure that needs a lot of specific how do you biopsy the patient to make sure we increase the chances of getting the right tissues to show expression. So yes, we are working on that. Also remember that we are looking at now patients, potentially patients that are not on modulators or correctors.

So we see -- I mean, there is no interference from that. So again, it's that kind of population that we're looking for. We have identified patients. We are actively working with the sites to get the study up and running. Our goal is to try to enroll all of them by the end of the year. We're going to work hard at it. I mean, again, remember, we are looking for a specific patient population that is not on modulators corrector. So there will -- I mean, again, we are working to get those patients enrolled.

[Krish Krishnan, executive]

Tim, just to complete that because we're outside the TDN, we're not guiding -- we have never guided on CF, we never know, but things are trending in a positive direction.

[Operator]

The next question is coming from Ritu Baral from TD Cowen.

[Ritu Baral, analyst]

Great. I wanted to ask about Europe and Japan, specifically what you guys are planning on commercial build-out or Europe right now? And if you can just give us an update on the MAA process, whether you're past the 180-day questions and whether you anticipate oral arguments there.

[Krish Krishnan, executive]

Thanks, Ritu. On the commercial side, we anticipate our first launch to be Germany, either very late this year or early next year, depending on when we get approval. We do have a German GM in place with -- coming from Shire. And so we're super excited about the launch in Germany. Meanwhile, we're setting up for name patient sales, expanded access, whatever, and the demand has been really good in Europe in terms of experience with the drug prior to actual launch and approval.

Japan is maybe a little bit behind relative to Europe, maybe 6 months or so. We do have a GM in Japan in place. And I'll now turn it over to Suma to talk about where we are with respect to timelines and approval in both these countries.

[Suma Krishnan, executive]

Thanks, Krish. Yes, I mean, we have received the 120-day questions. We also have -- remember, we have had scientific discussions through them throughout the process. There were no surprises in the questions. We also met with the EMA recently to go over some of the key questions that we needed for the clarification. I think the meeting went pretty well. We have clear clarity on what the expectations are, and we expect to respond to the LOQ in the next couple of months. And I think the process -- the time line is on track. for an approval end of this year.

So overall, we're very pleased with the process. And as you know, the inspection was also completed. I think we had a very successful inspection. And based on the feedback, looks like we should get GMP certification in a couple of months from now. And then in Japan, again, we have -- as Krish mentioned, we have completed the faced the open-label Japanese patient population study. The data looks very promising. We are in the process of writing up the study report, we have a meeting scheduled with the PMDA to talk about the Japanese NDA, and we are on track for filing the Japanese application. We are working with the CRO, the process of converting the European and the U.S. BLA to the Japanese NDA has begun, and we anticipate filing this application end of this year.

[Ritu Baral, analyst]

Got it. And then moving back to the U.S. Can you tell us what is current conversion time to commercial? I believe was Jen, you mentioned that it was -- sorry, I think it was Christine, who mentioned that it was getting a little longer than expected. Can you discuss what some of the headwinds to shorten that to the target 30 days has been?

[Krish Krishnan, executive]

Let me start, and I'll turn it over to Jen to provide specifics. Look, there are 3 pieces, right? First, the part in the middle is access once you get access -- it's about how quickly can you get a nurse into the home that you like and get treatment going. The piece before access is, once the doctor thinks about writing a prescription, is the genetic information in place, whether you're in the community setting or in a COE setting, getting all the paperwork and genetic information in place.

I'll start by saying the access part is really quick, maybe less than a week. So any time we're spending is either on the front end, depending on the type of the patient or on the back end where the caregiver is being pretty picky on the nurse that comes home and scheduling up the nurse to come home. But that said, -- in terms of turnaround time, Jen, maybe you can weigh in on that.

[Unknown Executive]

Yes. just like Krish had explained there, there are several dynamics when it comes to getting that patient on their first treatment, working with the payer and submitting those clinicals definitely takes time. As we move into the community setting, some of those offices are not at -- they don't have the staffing, some of that chart work or the lab work is maybe potentially in the center -- so that takes some time. So we continue to work our team and we have a great field team that's working with the offices supporting providing the education at the payer level. So we expect that to kind of shorten as we continue that education.

Once we submitted to the payers, as Krish said, that really is a very positive process. For the most part, our payers are well aligned. We have great policy. We understand what they need to be able to provide the approval. So that kind of turnaround time on determination seems to be shortening for sure as the payers are much more understanding of what's needed. And then that third part, scheduling with the family. Part of that, of course, is getting the nurses making sure we have a trained by VYJUVEK nurse and that we have the schedule and the flexibility that the family needs, and that just takes a little bit of time. But once we -- the exciting part is once we get a patient on the routine is established, -- they have a great experience, and we'll continue to kind of shorten that up. We understand it needs to be as short as possible. We need to get these patients on therapy as fast as possible, and that's our goal.

[Operator]

The next question is coming from Benavir Ali from Stifel.

[Unknown Analyst]

This is Beazer on for Dean. Can you guys hear me okay?

[Unknown Executive]

Yes.

[Unknown Analyst]

Okay. Just a couple of questions. First, Christine, based on your experience in Silfari, which oneof those 3 priorities that you find most impactful in onboarding patients and -- any sense of what kind of growth we can kind of envision going forward?

[Unknown Executive]

Yes. Thanks for the question. So really, all 3 of those pillars continue to be very important to this launch. And I find there's some uniqueness certainly in the dev space, but there's also some consistency that you see in the rare space. And so all 3 of those priorities continue to be important, the education of the HCP, the patient outreach and activation. So when you take a look across this, right, where our focus is in the 3 pillars that we talked about previously. We want to make sure that only -- not only are we educating the HCPs, but that we're really working with the patient population to share that education with them, to make sure that we're building on the momentum that has been created thus far.

[Unknown Analyst]

Okay. And then just one more question for either you or Krish. I think you mentioned about like 5,000 HCPs are aware of VYJUVEK. What's the geographic distribution? Like what areas are you going to focus on in the rest of?

[Unknown Executive]

Yes, I can take that question. I mean, really, what's exciting is that we are starting to identify patients, not just in the COEs but outside the community. And really, we are seeing those patients all across the country. This TED population really can sit in some more rural locations. It also sits obviously in our COE setting. So that's the exciting, I think, evolution of this launch that we're really starting to understand that the alerts are helping us with really identify patients across the country, but also across different specialties we're starting to see as well.

[Operator]

The next question is coming from Andrea Tan from Goldman Sachs.

[Andrea Tan, analyst]

Krish,maybe one for you. Just as patients have been on commercial drug now for quite a bit of time. Just wondering if you could provide an update on what you're hearing on the experience of these patients with respect wound closure. Curious if you're starting to hear of any patients starting to come off therapy as their wounds close? Or do you still believe the induction phase that previously you had projected at 2 years is still intact?

[Krish Krishnan, executive]

Yes. So to start with your last question, I think we continue to see a very high level of compliance -- it has been almost a year. Actually, August is the first time a patient got on VYJUVEK in a commercial setting. But compliance seems to be high, and we are continuing to say that the injection period, we expect induction to last maybe 15 to 18 months, after which you should expect patients to consume less number of vials going forward as the wound heal.

Now look, at 91% or 93% on a high -- over 90% compliance. If you think about 200 to 300 patients on drug on a weekly administration to get to 91%, we're talking a handful of patients may be missing a week here and there. So for all practical purposes, most of the patients are still on track. Now there have been 1 or 2 instances with dominant patients where we've actually heard look, all the wounds have here to be healed, especially in really young patients and calling us to ask "Hey, can we take a pause and resume if we see some kind of disruption in the wound?" Hasn't happened a lot. It just happens with young kids predominantly on dominant DEB,but it does have happened. Anything else, Jen, you want to add to that question?

[Unknown Executive]

No. I think, again, I think real world experience, we continue to hear very, very positive feedback from patients and pictures that we're seeing from our patients showing the improvement in the skin. -- the durability of the skin, just the skin feeling different all over. So the patients are very excited and we're happy that they are where they're at.

[Andrea Tan, analyst]

Perfect. So just to confirm, the majority of your patients you are still seeing receive about 1 vial per week.

[Unknown Executive]

Absolutely, yes.

[Operator]

[Operator Instructions] The next question is coming from Gavin Clark Gartner from Evercore ISI. Gavin, your line is live.

[Gavin Clark-Gartner, analyst]

I have a few, so I'll just go one by one. First, for the reimbursement approvals, are all these patients going on to receive paid drug? Or is there any leakage along the way?

[Unknown Executive]

Sure. So while definitely the majority are going on therapy. We continue to work with those that are -- as we get through the process. But for the most part, they are all going on therapy, yes.

[Gavin Clark-Gartner, analyst]

Okay. And you note -- I believe you noted that the Change Healthcare hack resulted in a lower number of reimbursement approvals in the quarter. Can you just help us quantify what that impact is?

[Unknown Executive]

Yes. I don't have -- quantifying it. In most part, it slowed it down a bit if you're aware of that when it came to change, some of that claim adjudication, some of the benefit verification had to pause because our partner relied on changed exclusively, I think. -- they definitely had a pause there. So it's back to normal, and we're back kind of expediting those approvals as fast as possible.

[Krish Krishnan, executive]

Gavin, I would say, look, if you do track something at reimbursement approvals on a weekly basis, the disruption can be quantified as a week to 2 weeks of disruption.

[Gavin Clark-Gartner, analyst]

That helps. And I wanted to just clarify on the compliance metric, that 91% that you provided. I think you noted it was 91% of patients who are on once-weekly therapy is the other -- are the other 9%? Are they on less frequent therapy? Or is there a different group of patients who have kind of discontinued treatment altogether?

[Unknown Executive]

No. That measurement is actually compliant to weekly therapy. How many patients receive their treatments weekly if they miss a dose, and that would negatively impact it. But in general, 91% of patients receive it weekly. And then if they miss a dose, again, it could take it down a bit. But does not mean that patients are getting it any alternative way. It's weekly. That's how it's prescribed, that's how it's dosed.

[Gavin Clark-Gartner, analyst]

Okay. Like is there a different group of patients who have discontinued.

[Unknown Executive]

No, no. It's just the balance of adverts that just missed a dose.

[Operator]

And the next question is coming from Yigal Nochomovitz from Citigroup.

[Yigal Nochomovitz, analyst]

Krishna, I just had a question on the ophthalmic study, this small open-label study in 10 patients. Could you just explain, are these patients, ones that are existing VYJUVEK patients -- or could they have been or is the use of VYJUVEK an exclusion criteria for those 10 patients? And then regarding your inhaled technology, I don't think you've talked a lot about the delivery system there. Could you just explain or using a nebulizer. How long is the inhalation session per dose? Could you just explain a little bit more about the way that's delivered?

[Suma Krishnan, executive]

This is Suma. I'll answer the first part of your question. With regarding to the eye, yes, a good chunk of the patients that are on a Phase III study also have manifestation I mean, impact on their eye. They have severe blistering or wounding -- as a result, they can't open the eye and it's very painful. So we already have a good chunk of patients who know about the study and are actually proactively want to enroll in the study. So we feel pretty good, we should be able to enroll these patients pretty rapidly.

Again, as I said, as we discussed with the agency, it 7 to 8 patients, small number of patients that we need to show wound healing compared to their actual history at [indiscernible] study and we anticipate enrolling the study pretty rapidly because we already know patients that are lining up for the study. With regard to your second question with the inhalation, yes, it's a standard nebulizer that is off the shelf that's available. The beauty of our product is unlike some of the mRNA deliveries because of the viscous nature of the material, you have to dilute a lot for it to go through the mesh. In our case, I mean, this is -- you can nebulize the product in less than 15 minutes. So it's a pretty rapid, fast nebulization time for these patients.

[Yigal Nochomovitz, analyst]

Okay. And just one quick follow-up on Japan and Europe. I assume that those approvals would be for the skin application first and then the ophthalmic application later? Or is there any possibility that the data from the ophthalmic product could be included with those submissions?

[Suma Krishnan, executive]

I mean, obviously, at the moment, it's all for the skin, it's the same. But once we complete the U.S. study, we may use the same strategy to go into these 2 countries. You can use the U.S. data to seek approval in those regions.

[Operator]

Thank you. And there were no other questions at this time. And this does conclude today's conference call. At this time, thank you all participants for joining the Krystal Biotech First Quarter 2024 Earnings Conference Call. You may now disconnect.