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Operator
Good day, ladies and gentlemen, and welcome to the OptiNose Third Quarter 2018 Earnings Conference Call. (Operator Instructions) As a reminder, this conference call is being recorded.
I would now like to introduce your host for today’s conference, Jonathan Neely, Vice President of Investor Relations. Sir, you may begin.
Jonathan Neely - VP of IR & Business Operations
Good morning, and thank you for joining us today as we review OptiNose's third quarter 2018 performance and our plans for 2018. I'm joined today by our CEO, Peter Miller; our President and Chief Operating Officer, Ramy Mahmoud; our CFO, Keith Goldan; and our Chief Commercial Officer, Tom Gibbs. The slides that will be presented on this call can be viewed on our website, optinose.com, in the Investors section.
Before we start, I would like to remind you that our discussions during this conference call will include forward-looking statements. All statements that are not historical facts are hereby identified as forward-looking statements. Forward-looking statements are subject to risks and uncertainties that could cause actual results to differ materially from those indicated by such statements. Additional information regarding these factors is discussed under the Cautionary Note on Forward-Looking Statements section of the earnings release that we issued this morning, as well as under the Risk Factors section of OptiNose's most recent annual report on Form 10-K and Form 10-Q that are filed with the SEC and available at their website, sec.gov, and on our website at optinose.com.
You are cautioned not to place undue reliance on forward-looking statements. The forward-looking statements during this conference call speak only as of the original date of this call or any earlier date indicated in such statement, and we undertake no obligation to update or revise any of these statements.
We will now make prepared remarks, and then we will move to a question-and-answer session.
With that, I will now turn the call over to Peter Miller. Peter?
Peter K. Miller - CEO & Director
Thank you, Jonathan, and good morning, everybody. Starting on Slide 3. We'd like to begin by highlighting our key priorities. Since our earnings call in August, we have completed a transition past the initial launch phase for XHANCE, which was highlighted by the Xperience program. Strong initial position awareness generated by our prelaunch nurse educator initiative and then early trial driven by the Xperience program were important elements of our initial success and created thousands of physician and patient treatment experiences in the second quarter of 2018.
We leveraged key learnings from this period to help inform commercial efforts as we transitioned out of the initial launch phase into the second wave of our launch plans starting in the middle of the third quarter.
In this second wave of our launch, our sales team has been in the field since mid-August, equipped with new materials that extend beyond describing our EDS technology and shift our communication emphasis more towards the efficacy of XHANCE. Other key elements of our second wave commercialization efforts include arming our sales team with an updated patient affordability program for physicians to share with their patients and with messaging aimed at quantitatively identified patient types to improve the ability of our sales team to help doctors identify the most appropriate patient types for XHANCE.
While we hope transparency into our marketing and sales efforts will help our investors appreciate our decision-making process, we recognize that the bottom line for many on the call today is prescription growth. And so our biggest news today is that we've accelerated XHANCE growth in September and October driven by the adaptations we have made to our plan. We'll review the details and results in depth later in this presentation.
Our second key priority is to initiate trials to broaden the label for XHANCE to include an indication for treatment of chronic sinusitis. Currently, we are aware of no drug in the United States or the world with this indication. We view this development program as an important long-term value driver and are making good progress.
Finally, with approximately $220 million of cash available at the end of the third quarter, the strength of our balance sheet enables us to focus our efforts on the execution of our commercialization and development plans for XHANCE.
Turning to Slide 5. Our long-term confidence in the potential for XHANCE continues to be supported by positive feedback from physicians who have integrated our product into their practice. And some of you listening in today have shared similar feedback with us from physician calls that you have conducted during your own diligence. In the past, we have shown examples of CT scans that ENTs have shared with us while we're in the field. More recently, at the American Rhinological Society and the American Academy of Otolaryngology-Head And Neck Surgery Annual Meetings, we had the opportunity to view a podium presentation on emerging treatments for chronic rhinosinusitis by a physician investigator who chose to include a video from one of our studies in which patients were treated with XHANCE.
On the left-hand side of this slide is a still image from the video that was taken prior to treatment with XHANCE, with the circle indicating where polyp tissue can be seen. The right side of the slide shows a still image from video taken after 12 weeks of treatment with XHANCE. In these images, an ENT can easily observe substantial regression of polyp tissue and reduction in the associated inflammation high and deep in the nasal cavity. What is also interesting in the image on the right is that you can now see scar tissue from a prior surgery, which was obscured by the polyp in the image on the left. In his own words, the investigator stated the effects were dramatic. Prior to conducting this study, this physician expressed skepticism that polyps could be reduced to a grade of 0 with any intranasal spray, including XHANCE. This illustrates a key advantage we have in the treatment of this disease. Not only does XHANCE improve symptoms directly perceived by the patient, but physicians can also objectively observe the effect of XHANCE via routine clinical assessments, such as endoscopy and imaging. As we continue to progress with the launch, the fact that many physicians can see for themselves in an objective manner the impact XHANCE can have on reducing nasal polyps and associated inflammation high and deep in the nose will be a key factor that we believe will continue to drive product adoption.
Turning to Slide 6. If you were with us for our second quarter update, one message we wanted people to hear was that despite lots of market data, we did not get our patient assistance program completely right in the transition at the end of our Xperience program. However, we believe we moved in a disciplined manner to rapidly adapt and that we now have the right program in place. Data suggest that our territory managers have done a good job of educating physician offices regarding the key features of our current patient affordability program during September and October. And this communication will remain a commercial priority to make sure target physicians understand the program. As a reminder, the key features of this program were a $0 co-pay for the initial prescription for all patients with commercial insurance, a maximum out-of-pocket of $30 for refill for patients with commercial insurance that covers XHANCE and a maximum out-of-pocket of $50 for refills for patients with commercial insurance that does not cover XHANCE through our mail-order pharmacy partners.
In addition to the revised patient affordability program, starting in mid-August, our sales team began engaging health care providers with new marketing materials, which increased our emphasis on the efficacy of XHANCE. Importantly, these materials now include XHANCE clinical results on the Sinonasal Outcome Test, in which the magnitude of improvement observed on the secondary endpoint was comparable to that reported in medical literature for patients after undergoing surgery.
Turning to Slide 7. Before turning to prescription trends, I will briefly review some additional commercial updates. On the market access front, nationally, based upon third-party syndicated data and internal analysis, we believe that greater than 75% of commercial lives are currently in a plan that covers XHANCE. Our coverage number includes all covered lives, inclusive of lives that may be covered with Tier 3 formulary status with unrestricted access or one or more step edits, where lives with coverage require some form of prior authorization. We recognize that not all coverage is equal, thus we have continued to pursue limited hassle coverage, which we defined as Tier 3 formulary status with unrestricted access, a single step edit or a simple prior authorization that may require, for example, only confirmation of prior intranasal steroid use.
Although we estimate that approximately 60% of all commercially insured lives have formulary access that involves limited hassle, we continue to target our efforts towards increasing this number by year-end.
In addition to the lives covered by commercial plans, we're making good progress creating opportunities for XHANCE to benefit patients covered by Medicare and Medicaid plans. We recently signed our first Medicare Part D contract with a leading provider, and we have positive Medicaid coverage decisions in several large states. We've also been successfully driving breadth of physician prescribing, and we have steady growth in the number of weekly writers since the start of the third quarter. We're also working hard to create greater depth of prescribing by the leading writers within each sales territory.
Finally, I'm very excited by the potential growth that could result from direct-to-consumer marketing for XHANCE. This chronically suffering patient population is large, with high unmet need, and the symptoms are such that patients have a good chance of recognizing them. Earlier this year, we hired a Head of Consumer Marketing with experience leading major brands. We plan to launch our first direct-to-patient effort in the fourth quarter of this year using a cost effective digital-only approach. We expect to use learning from this initial effort to explore broader B2C efforts via an expanded pilot approach next year. This area could be an important incremental driver of growth in the near to mid-term, and has potential to be a key commercial initiative for the company.
Turning to Slide 8. Our last communication of prescription data on October 1, with data through the end of August, contained limited information regarding how our revised commercial efforts, including the new patient affordability program, new marketing materials with physician-specific patient segmentation, all fielded in mid- to late August, were performing. Today, we have weekly data from November 2. And based on this data, we estimate that prescriptions for the month of October increased approximately 42% versus the month of August. We note that September had fewer business days than either August or October. Specifically, while August and October had 23 business days, September had only 19.
Turning to Slide 9. Reviewing the weekly prescriptions help adjust for the calendar effects and shows consistent growth since we launched our new promotion materials and new patient support the week of August 17. Total XHANCE prescription volumes in the 4 weeks ending September 7, the first 4-week period following fielding of refined commercial materials, was just over 2,930. The next 4-week period, ending October 5, showed approximately 22% growth in TRx to about 3,570. The most recent 4-week period, ending November 2, showed additional TRx growth of approximately 28% over the prior period, reaching approximately 4,550.
We're encouraged by this trend, particularly because we are still in the process of reaching all targeted HCPs with our new materials and our updated patient affordability program. In a few moments, I will update you on our pipeline and provide some closing remarks.
Before that, I will turn the call over to our CFO, Keith Goldan, for comments regarding third quarter results and perspectives regarding fourth quarter and full year 2018.
Keith Alan Goldan - CFO
Thank you, Peter, and thank you, everybody, for joining today.
Turning to Slide 11. As we reported earlier this morning, OptiNose recognized $1.9 million of revenue in the third quarter. Based on available XHANCE prescription data purchased from third parties, as well as data from our mail-order pharmacy partners, our average revenue per prescription for the third quarter of 2018 is approximately $191, which is favorable compared to the average revenue per prescription of approximately $144 in the second quarter of 2018.
Average revenue per prescription is calculated by dividing net revenue for the quarter by the estimated number of XHANCE prescriptions dispensed during that period. As a result, this metric is subject to variability. That variability is impacted by factors that do not necessarily reflect the change in the price that is paid for an individual unit of XHANCE, including, but not limited to, ordering patterns and inventory levels for our wholesale customers and mail-order pharmacy partners, patient utilization rates of affordability programs and the proportion of patients acquiring XHANCE through an insurance benefit.
With respect to third quarter 2018 average revenue per prescription, the favorability was driven primarily by lower rates of utilization of patient affordability programs than occurred in the second quarter of 2018. While the third quarter average revenue per prescription improved relative to the second quarter, we anticipate that our fourth quarter average revenue per prescription will be lower than our third quarter average revenue per prescription due to an increase in the utilization of our patient affordability program.
Moving to Slide 12. Operating expenses, defined as sales, general and administrative expenses, plus research and development expenses, were $25.1 million for the third quarter of 2018, which brings our year-to-date through September 30 total to $78.7 million. Although we expect an increase of expenses in the fourth quarter as we ramp up clinical trials, we are nevertheless adjusting our full year guidance for operating expenses downward, and we now expect operating expenses to fall near a range of $112 million to $115 million for the full year of 2018.
I'll now turn the call back over to Peter for his closing remarks.
Peter K. Miller - CEO & Director
Thank you, Keith. Turning to Slide 14. In addition to the launch of XHANCE, we believe significant additional long-term value could be created by the pursuit of a follow-on indication for the treatment for chronic sinusitis, or CS. This is an indication for which we are aware of no previous FDA-approved drugs and a condition which has a prevalence estimated to be approximately twice that of the nasal polyp population that XHANCE is indicated to treat today.
On our last call, we relayed that we had an informative meeting with the FDA regarding the CS study design and that we were taking final steps towards preparing to begin enrolling patients in the CS pivotal program in the fourth quarter of 2018. We remain on track to achieve that objective as planned.
Turning to Slide 15. In conclusion, we believe we have made good progress since the second wave of our launch in mid-August. We continue to feel very positive about the long-term prospects of the company, largely based on the acceleration of prescription trends and based on the continued positive feedback from patients and physicians. Thank you. Now I'd like to open it up for Q&A.
Operator
(Operator Instructions) And our first question comes from the line of Gary Nachman with Bank of Montreal.
Gary Jay Nachman - Analyst
Peter, first, I guess, just on the co-pay program. So how long do you plan on continuing the 0 first co-pay followed by the 30, 50 refills? It sounds like that's been received well. It feels like that you have it right. So is this something that's going to go on indefinitely? And then on the reimbursement, you said low hassle at 60%. It feels like that's gotten a little bit lower. So could you explain why that's the case? And maybe you won't be able to achieve that 75% low hassle status by the end of the year?
Peter K. Miller - CEO & Director
Yes, sure, Gary. Thanks for the questions. Regarding the timing of the new patient affordability program that we put in place, Gary, I think we learned last time that we certainly stopped the Xperience program too soon. So our broader objective is to make sure that we allow enough time to really give patients and physicians the opportunity to experience the product. So for certain, it's going to go through the end of the year, for certain. And I think we believe at this point in time, it is very likely to go into next year. I would expect into a good part of next year. But it's something, obviously, we're going to watch for on sort of a looking at the data, seeing what kind of adoption we have. We obviously, are balancing 2 things here: driving broad adoption while also making sure we manage our ASP, or average revenue per prescription. But for now, our focus is on -- we have a good acceleration in terms of our prescription trend. Right now, our emphasis is on continuing to drive trial. Regarding the low hassle, we've candidly, Gary, been bouncing between 60% and 65% across the last couple of calls. And obviously, what happens here is we get contracts, we're just -- it's constantly in a little bit of a minor state of flux, if you will. We continue to feel that it is a real focus of ours. We have a couple big plans that we're in discussions with right now about getting what we think could be a low hassle position. So achieving the 75% that we stated at the beginning of the launch, it's something we're still driving for. At this point in time, because of the way the discussions are going, I continue to feel pretty good about it.
Gary Jay Nachman - Analyst
Okay. And then just a couple more. Are you seeing greater uptake with the ENT specialists or the allergists? And how much traction have you had with primary care? And then, Keith, just a little bit more. I appreciate all the color on the net price per prescription, but how far down should we assume in 4Q versus 3Q? Should it get back closer to the levels that we saw in 2Q? Just give us sort of a range there. That would be helpful.
Peter K. Miller - CEO & Director
Hey, Tom, why don't you handle the first one, penetration to ENT, allergy and primary care, and then we'll turn it to Keith.
Thomas E. Gibbs - Chief Commercial Officer
Sure. Thanks for the question, Gary. When we look at ENT versus allergy, we do see a growing percentage of contribution from the ENT. I think that's based upon our focus and being able to reach more and more ENTs from a call plan point of view. It is still primarily driven by ENT and allergy. The number is about 43% ENT, 38% allergy.
Peter K. Miller - CEO & Director
And the balance, actually, Gary, is primary care.
Gary Jay Nachman - Analyst
Primary care, yes.
Thomas E. Gibbs - Chief Commercial Officer
Yes. Gary, the balance is primary care, which also includes your mid-levels, which is nurse practitioners and physician assistants.
Keith Alan Goldan - CFO
Yes. And Gary, with respect to your second question on net revenue per prescription. The increase, as I mentioned in my remarks, the increase that we saw in Q3 was really driven by a decrease in the utilization of that patient affordability program. If you'll recall, in Peter's comments, he remarked that the program is really -- the updated program is really introduced in mid-August, mid- to late August. So in the fourth quarter, we do expect a full quarter of utilization of that program. That we feel is what's going to have the negative impact, if you will, on the net revenue per prescription when you compare it to the third quarter. But based on what we see today and our assumptions, looking forward, we would not expect it to fall back, certainly not under the 2Q levels.
Operator
And our next question comes from the line of Randall Stanicky with RBC Capital markets.
Ashley Ryu - Senior Associate
This is Ashley Ryu on for Randall. Peter, I just wanted to clarify, how much of the 42% increase since August is kind of from samples coming out? Since I believe you continued the sample through, I think, mid-August. So essentially if you added the samples back to the August number, what would the growth have been?
Peter K. Miller - CEO & Director
Well, actually to be clear, we've never put sample distribution in the prescription data that we're talking about. We've, historically, we've talked about samples that were distributed, but in the past several quarters, whenever we're quoting prescriptions, they do not include samples. So they are -- all of that growth is -- does not include any sample.
Ashley Ryu - Senior Associate
Sorry. Yes. I think maybe just to clarify, I did understand that the TRx never included the samples, but since, presumably, there were some patients that were getting the samples before, and now they're kind of at the $0 co-pay instead. Just trying to get an understanding of -- because you had some new patients starting on samples, right, in August? So I'm just trying to get a sense of if you had included that number, what it would have been.
Peter K. Miller - CEO & Director
Tom, I don't know if you can quickly do the math on that, if we put samples in. Because we're not -- we've actually tried to limit our sample distribution into patients that are really -- don't have the ability to take advantage of our patient affordability programs. So they're really sort of geared towards the Medicare, Medicaid who do not have coverage currently. But we're encouraging physicians to really take advantage of the $0, first script for free, if you will. So that's really been the focus of our effort. But Tom, I don't know if you can provide any additional color on if we put samples in, roughly how many patient starts do we have in total?
Thomas E. Gibbs - Chief Commercial Officer
I really think it's probably best not to use samples as a number in terms of really trying to define what your prescription volumes are because you could -- the only thing, the reason why you can't do that is we know how many samples reach the physicians; we do not know how many samples actually reach the patient. Although we have a good estimate, it would just be an estimate.
Ashley Ryu - Senior Associate
Sure. Okay. And then as a follow-up, last quarter, you said that physician perceptions of the access for XHANCE may actually be lower than the actual access that you've achieved, and that could be an impact. So now that you have kind of a solid base of physicians that have prescribed XHANCE already, and presumably in doing so, they kind of understand what the axis actually is, when do you expect of these docs to start kind of really inflecting the production volumes? Because it seems like you're getting good progress in reaching new prescribers.
Peter K. Miller - CEO & Director
Tom, do you want to take that one, too?
Thomas E. Gibbs - Chief Commercial Officer
Sure. As you know, access is one of the key drivers in terms of physician uptake. I think one of the things that we've done with our patient affordability program is remove as many barriers as possible to patient uptake. We continue to see an increased number of physicians who are writing each and every week, also each and every month. And with that, we are seeing a number of physicians who are increasing their depth quite dramatically. So we continue to make good progress along the front in terms of broadening our total number of prescribers, but also deepening their prescriptions as well. And it's just that...
Peter K. Miller - CEO & Director
You can imagine, too, actually, that we're -- sorry, Tom. You can imagine, too, actually, we're just still -- you change a program, but then it takes some time to make sure that docs really understand it. So that's why I said in my remarks that in addition to, obviously, the most important messaging right now is efficacy messaging, talk about the product. And I mentioned about the Sinonasal Outcome Test. We have very positive data to talk about with physicians. But we continue to make sure they really understand the program because as we said on the last call, we didn't really get it right out of the Xperience program. We feel really pretty good about the program we have in place based on all the research we did prior to fielding it and the feedback we're getting to date on the program. So we're feeling pretty good that we continue -- that we're going to be able to continue to drive lots of trial with this program.
Ashley Ryu - Senior Associate
Got it. And I think last quarter, you mentioned that there were around 400 doctors that were -- I think you called them, like, loyalists. They were doctors writing like 10 or more prescription in a period. Do you have a sense of what the number is today?
Peter K. Miller - CEO & Director
Yes, Tom, I'll let you take that one, too?
Thomas E. Gibbs - Chief Commercial Officer
That number has increased by 50%.
Operator
And our next question comes from the line of David Amsellem with Piper Jaffray.
David A. Amsellem - MD and Senior Research Analyst
Just a few. So I first wanted to ask you about contracting. So I think you had mentioned on the last call that you had a contract with ESI and Caremark in place. So I wanted to get your thoughts, number one, on how the contracts in place impact the extent of co-pay subsidization? And then, secondly regarding contracts, can you talk about other big national contracts that you still need to execute on, on the commercial side? And then the last part is on Medicare Part D. You mentioned that you had your first contract in place, can you say who that's with? And what are -- your thoughts are for Medicare Part D access for 2019?
Peter K. Miller - CEO & Director
Tom, why don't take the lead on it? And I can jump in and add color.
Thomas E. Gibbs - Chief Commercial Officer
On the first one, just I'll first start with Medicare Part D. The first contract we signed was with ESI. So obviously, one of the largest provider of Medicare, at least one of the top 4. National contracts, we continue to have negotiations in place with all of the top insurers, and I'm sure that you could use that guidance as an estimate who they are. On the co-pay subsidization, as you know, there are just several different types of plans. For example, within ESI and Caremark, there is -- including high deductible plans as well. So I can't give you one specific number on that, but I can tell you, over time, we are seeing a reduction in the overall co-pay assistance through our program.
Peter K. Miller - CEO & Director
And the last point, I'll take, David, is on terms of the accounts that are out there. We have a couple of big accounts we're in discussions with right now. And we expect -- we're having good discussions, and we're encouraged by those discussions and believe that our coverage does have room to improve.
David A. Amsellem - MD and Senior Research Analyst
Okay. That's helpful. And if I may, just on -- just to sneak in a follow-up. This is on the mix among specialists versus primary care, maybe this is a question for Tom. But you've gotten some traction in the primary care setting. I guess the question here is, just given the mix between primary care, ENT and allergists, do you feel that there's usage of the product among patients who do not have polyps? Or do you feel that there is a -- that doctors are agnostic about whether the patient has polyps or not? And maybe you can speak qualitatively to that so far.
Peter K. Miller - CEO & Director
Tom, I'll let you take that one, too.
Thomas E. Gibbs - Chief Commercial Officer
Sure. I think at least when you look at the ENT allergy mix, David, I think it's important to note that, really, 90 -- or 85% of our promotional efforts are focused on ENT and allergy. So I think the mix of the ENT allergy versus primary care is reflective of the efforts that we're putting in. And as you remember, our initial launch strategy was really to be able to penetrate the ENT allergy segment, and I think we're making good progress. And I'm very happy to see the progress that we're making in ENT specifically, because from a physical access standpoint, it's harder for our representative to see. And as they're beginning to be appropriately educated on XHANCE, I think they're seeing the broad utility. When we look at the utilization of XHANCE across disease states, I just do want to reiterate that we only promote within our labeled indication for nasal polyps. But obviously, physicians can use a product as they see fit. When you look at it right now, within the category of chronic rhinosinusitis as we've defined before, about 67% of our utilization, which is within chronic rhinosinusitis, about half are nasal polyps and about half would be the other chronic rhinosinusitis buckets.
Operator
(Operator Instructions) And our next question comes from the line of David Steinberg with Jefferies.
David Michael Steinberg - Equity Analyst
A couple of questions. The first is you mentioned you recently started, I think you called it a targeted digital DTC campaign. I was curious, is it too early to tell; is any of the acceleration, do you think, coming from that campaign? The second related question is when do you expect to expand the targeted campaign? And then beyond that, will you, say, next year, be doing anything in other media, like print or TV? The second question is last month, there was some positive data in polyps regarding the biologic Dupixent. And I was just curious whether you thought that was a real serious competitor to your product? Or whether because the price tag is so high, it's really just not -- it's not really a viable approach to treating nasal polyps?
Peter K. Miller - CEO & Director
Yes. I'll take the first couple, and then I'll pass the next one to Ramy, on Dupixent. Ramy, I'll let you sort of tackle that one. Relative to the DTC, for sure, none of the growth that you're seeing to date has been driven by the DTC program. Because it was not -- it is not yet in the market. We do expect to get it in the market in fourth quarter. But it has not yet been in the market, so obviously, it couldn't be driving prescription trends. Regarding the expanded program. What you mentioned is exactly what we're going to look at. So we are right now in a targeted digital, very cost effective, also you can read that in very real time to make adjustments, if necessary. As we stated on the call, we are going to look at broadening, doing a more broad-based DTC program. We plan to do that on a pilot scale. So we don't plan to do that sort of broadly, nationally. We're going to pick a couple of markets and make sure we understand it before we go too broadly with it, and that is likely to include vehicles beyond digital, like media, like print. As we stated, that will be -- we plan to initiate that at some point next year. Ramy, I'll let you handle the Dupixent.
Ramy A. Mahmoud - President & COO
David, thanks for the question. Overall, I think we view the development of Dupixent for nasal polyps or any of the polyps indication as a really positive development for XHANCE, in part because we believe that the discussions we're having with payers, which are already pretty productive, will benefit further from the potential approval of this $35,000-plus potential treatment for nasal polyps. In addition, based on what we've read, and I'd emphasize that it's a preliminary press release and other not yet complete information, but based on what we've read, we believe XHANCE is really going to continue to be an all-around attractive option for treating patients with nasal polyps.
David Michael Steinberg - Equity Analyst
Okay, great. And just 2 quick follow-ups. The first one is we learned in the last couple of months that, even though it's a chronic condition, that seasonality plays a role, meaning seasonality in terms of less traffic in the summer. And I was curious, looking out for the full year, are there any -- is there any other seasonality throughout the year? For example, would there be more foot traffic regarding your product, say, in the flu season? And then secondly, is your sales force rightsized for the opportunity? Do you think you'll add reps or subtract reps? Or are you good to go in the current size of the sales force?
Peter K. Miller - CEO & Director
I'll take them, Tom. You can jump in and add some color. Relative to seasonality, if you look at our segment of the -- of this intranasal steroid category, the sort of back half of this year is reasonably consistent. So in other words, if you look at the category, September, October, November, December are reasonably in line. Where you see a pretty significant uptake in the category is sort of in the early part of the spring next year. So February, March, April is when you'll start to see somewhat of a -- what typically is a pretty substantial lift, certainly, in terms of the number of patients and physician offices. Tom, I don't know if you have anything to add to that before I move on?
Thomas E. Gibbs - Chief Commercial Officer
No. I think that's right. You basically hit your trough in the July time frame, then you see steady growth throughout the third and fourth quarter, and then an acceleration in the first -- really, the back half of the first quarter, early second quarter.
Peter K. Miller - CEO & Director
Yes. I think the key that we've learned, by the way, is that -- we said this last time, but I still want to reiterate that we think the greatest impact on the seasonality for us is number of people in docs' offices. And the thing we feel really good about is that we have the program, we made the, we believe, the right adjustments to the patient affordability program. We have, frankly, more compelling messaging on the efficacy side with the Sinonasal Outcome Test data and with the segmentation analysis that we did. So we think the acceleration you're seeing is due to the changes there that we've made. So we're feeling really good that this is not being driven, what you see now, by seasonality in the category. Regarding sales force, we've -- for the balance of the year, we feel that the sales force that we have is appropriate. I think looking at expansion at some point next year is absolutely something we're going to consider.
Operator
And our next question comes from the line of Bill Tanner with Cantor Fitzgerald.
William Tanner - MD and Senior Research Analyst
Peter, I had one for you, or maybe for Tom, as it relates to the endoscopy and the imaging. It certainly looks like it's been effective in converting or convincing physicians to use the product. And I'm just curious how you see that playing out over the longer term? If physicians are going to do it in a handful of patients up front, and then just generally believe, okay, this thing works, and establish a basis for people being able to move on beyond that? Or if you think that they'll do it on a PRN basis for certain patients. And then I guess, secondly, is your thinking then about broadening to -- beyond the early adopters to the allergists and to the PCPs, just any commentary on how you might see those practices, that being endoscopy or some kind of imaging thing to put with what those physicians currently do.
Peter K. Miller - CEO & Director
Thanks, Bill. I'll take it, and Tom can jump in. But we have found, Bill, especially in the ENT community, that there's a bunch of the ENTs that like sort of taking a handful of patients. In many cases, we're sort of getting the most recalcitrant. So they're putting really top patients on the product. And they want to see if it works. And we said this, they have the benefit of actually being able to see it for themselves via the imaging or via some form of endoscopy, a video or a picture that they take. And we're very encouraged, Bill, that, gosh, there's a lot of physicians we interact with that have done these little pilots, if you will, and are getting very good results. That's why we're sharing them on these calls. So, especially in the ENT community, as they start to see more and more evidence that the product works, I think it's -- it wouldn't be unreasonable to think that they're really going to begin potentially thinking more broadly in terms of their patient population, in terms of the number of patients they feel that would be appropriate. So that's relative to -- and we are working at making sure that -- we have ways of getting, fully compliantly, some of the work that we're doing on the video studies out to the broader physician population, obviously, very -- fully compliantly, I'll say. Relative to expansion, the one thing we've really learned, Bill, and we sort of knew this coming in, but the allergists and the PCP really have a different mindset in terms of treating versus the ENT. The ENT sort of approaches it much more from an anatomy perspective. The allergists and the PCP tend to treat it much more from a biology, trying to improve symptoms, if you will. So the messaging that we sort of take to those doctors is fairly tailored. And the ENT, we have 2 different coordinator's aids, one for an ENT, one for an allergist who's more of a PCP. So the messaging is a little bit tailored, but based on the work that we've done, that messaging in its own way is just as impactful. At the end of the day, they want to see patients -- both ENTs and allergists want to see patients getting better. And but it has more of a skew in the allergist community on the symptoms side.
William Tanner - MD and Senior Research Analyst
Okay. And then maybe just a follow-up on that. Peter, I know you mentioned the pilot studies and being mindful of the adage that the plural of anecdote is not data. Is there a way, or do you think it's unnecessary to try to aggregate some of these things, maybe present them at medical meetings, and get it out in the treatment community? Or do you just think over time there's going to be a general understanding or belief that, look, this product works, and you're going to kind of be beating a dead horse providing some ancillary data points like that?
Peter K. Miller - CEO & Director
No, Bill. It's something that we think is a really good idea. And it's -- I'll just say it's something that we are actively sort of thinking about and looking at how to pursue. So to be specific, the idea of how you can create greater evidence via the imaging and via the video studies and that, sort of, that type of material we think could be very compelling. And then, finding a way to then disseminate it totally appropriately, but we are working on it.
Operator
And I'm not showing any further questions at this time. I'd now like to turn the call back over to Peter Miller for any closing remarks.
Peter K. Miller - CEO & Director
Well, we just want to thank you all for joining, and we look forward to talking to you again at our next update. So thanks very much.
Operator
Ladies and gentlemen, thank you for participating in today's conference. This does conclude today's program, and you may all disconnect. Everyone, have a wonderful day.