Michael Benkowitz
Chief Executive Officer
Sure. I think in terms of the first part of the question around PHILD growth, you know, as you recall, we expanded our sales force coming into 2024. Really to try and drive the drive prescribing growth in the PHILD or in the I'm sorry, in the ILD treaters, those physicians that are seeing the PHILD patients. So it'll be a prior to that. Or at least at launch and up till then, I think what we were seeing is, you know, the vast majority of PHILD patients were being referred to pulmonary hypertension clinics and it was those physicians that were prescribing Tyvaso. And so, you know, our but, yeah, as a kind of think of the patient population, that really wasn't a sustainable model going forward if we really were going to have an impact and be able to penetrate the market. So that was really sort of the idea behind the expansion was to really start to continue to educate the ILD treaters on, you know, not only the disease, but how to use Tyvaso, how to start, you know, and treat patients. So I will say that that so far has paid off in spades. You know, if you look at our prescriber growth over the course of 2024, the majority of that growth is in the ILD treating community. So we are starting to get the breadth of prescribers in that group. And then actually starting to make some mends on the depth. I talk often about the three plus doctors that get to three plus patients, you know, then they quickly jump up to six, seven, eight, nine, ten patients. So we're having a lot of success both in terms of the growth of the breadth of the prescribers and starting to get more depth among those prescribers. And so I think we just expect that to continue as we move on into 2025 and beyond. And, you know, I was just looking at, you know, calculating if you look at, you know, patient growth between PHILD and PAH. The nice thing is with Tyvaso is we're actually growing on both indications. So in 2024, we grew roughly I think there's about 37%, 35 to 40%. In PHILD, still mid-teen growth. In PAH. So it's nice to see that we're growing in both indications. The yeah. So I think, hopefully, that addresses the first part of your question around prescriber growth and then growth in PHILD versus PAH. As it relates to Part D impact, I think as we said for the last couple of quarters, I think that largely played out last year. You know, we saw in Q1, we saw more patients or patient assistance patients convert over to commercial paying patients in Q1 of 2024, and then that continued over the course of the year and we kind of settled in at about, you know, about roughly 90% of our patients are commercial paying patients. And then 10% are in our roughly 10% are PAP program. I would expect that that's going to be kind of the new normal or the baseline going forward. Could shift, you know, bounce around a little bit quarter to quarter just depending on the type of patient we're getting in. But generally, I would expect to kind of settle in around that. So I'm not expecting to see much of an impact in Q1 or Q2 as a result of the Part D redesign.