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Operator
Good afternoon, ladies and gentlemen, and welcome to the Veracyte Second Quarter 2017 Financial Results Conference Call. (Operator Instructions) As a reminder, today's conference is being recorded.
I'd now like to turn the conference over to Jackie Cossmon, Vice President of Investor Relations and Corporate Communication. You may begin.
Jackie Cossmon
Thank you, Tanya. Good afternoon, everyone, and thank you for joining us today for our Second Quarter 2017 Financial Results Conference Call. Bonnie Anderson, our Chairman and Chief Executive Officer will be leading the call today; and Keith Kennedy, our Chief Financial Officer, will be providing an update on the financial results for the second quarter. John Hannah, our Chief Commercial Officer, is also joining us on the call, and will be available for questions.
Before we begin, I'd like to remind you that various statements that we may make during this call will include forward-looking statements as defined under applicable securities laws. Forward-looking statements include, statements regarding our future plans, prospects and strategy, financial goals and guidance, product pipeline and other statements that are not historical fact. Management's assumptions, expectations and opinions reflected in these forward-looking statements are subject to risks and uncertainties that may cause actual results and/or performance to differ materially from any future results, performance or achievements discussed in/or implied by such forward-looking statements, and the company can give no assurance that they will prove to be correct. In addition, today's press release -- in addition today's press release, those risks and uncertainties are described in the company's filings with the Securities and Exchange Commission. Prior to this call, we announced our second quarter 2017 results, which are available on our website at veracyte.com, by clicking Menus on the top right corner of our website, and clicking through to our Investors landing page and then Press Releases. We also released a financial presentation, which Keith will reference later in the call when he covers our financial results. You may find the financial presentation in the same Investors section under Events and Presentations.
At this time, I'd like to turn the call over to Bonnie.
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Thank you, Jackie, and thanks everyone for joining us today. Our strong execution in the second quarter paved the way for continued revenue growth in the second half of 2017 and beyond. Our standout achievements include the launch of our second-generation Afirma Genomic Sequencing Classifier or GSC, the highly anticipated positive coverage determination for Afirma by Anthem, our execution on initiating the Quest/AmeriPath agreement, and the receipt of our first commercial orders for the Percepta Genomic Classifier. I'll talk about these and the other key milestones within the framework of the 4 metrics used to measure our success in 2017. They are: revenue growth, reimbursement expansion, evidence development and financial discipline.
Let's start with revenue growth. We delivered revenue of $18.4 million for the quarter, a growth of 25% over prior year, and believe we are well positioned to sustain strong growth through the second half of the year. One of the key drivers of our continued momentum is the successful conversion of our first customers to the Afirma GSC this quarter, which has reenergized our sales team. We are pleased with the positive responses from physicians, and are on track to complete the transitioning of our test to the new platform by early 2018. The Afirma GSC is being premiered with a new multi-channel marketing campaign to heighten awareness among physicians and patients of the gravity of unnecessary thyroid surgery, and to encourage more patient-shared decision-making in the assessment of thyroid nodules. Our research demonstrates that most patients would elect to preserve their thyroid gland if a safe and effective test like our Afirma classifier were available to them.
In addition to the Afirma GSC launch and promotional push, we have now implemented access to the Afirma classifier through Quest/AmeriPath division, enabling the laboratory's broad national network of physicians to order the test. Quest sales reps are fully trained and enthusiastic about having the market-leading standard of care Afirma classifier to offer their customers. We expect to begin seeing some lift from this relationship in the back half of 2017, and we'll be nicely positioned to drive further growth through Quest in 2018.
Lastly, as it relates to revenue growth, we are very pleased with the successful early adoption of our Percepta Bronchial Genomic Classifier as our commercial expansion is underway with the Medicare coverage policy now effective. The Percepta classifier provides patients with a safer pathway for lung cancer screening and diagnosis, and early data from our registry study demonstrate clinical utility that supports our earlier expectations.
Our first-to-market strategy with the Percepta classifier is to focus our efforts on large institutions for early adoption, typically high-volume accounts with regional, if not national thought leaders. Once we've secured the business in these large institutions, we'll then move to local institutions that typically follow the lead of the larger medical centers, it's a basic hub-and-spoke model, if you will. This strategy maximizes the efficiency of our sales force who are already in these large centers. And in fact, for the accounts that we've secured to-date, there is a 100% overlap with Afirma classifier business, as strategy we employed to further leverage our sales operations.
We are excited that the Percepta classifier is expected to contribute our revenue beginning in the third quarter of 2017, and as we drive adoption of the test and expand access, it will yield more significant revenue growth in 2018.
Our second success metric for 2017 is reimbursement expansion. We were thrilled to report in May the achievement of an important milestone and a key catalyst for our business, the positive coverage policy for Afirma classifier by Anthem. This adds nearly 40 million covered lives and brings the new total to over 260 million lives, which equates to coverage by virtually all major health plans in the U.S. The full value of the Anthem coverage decision will be derived when we finalize contracts with the Blues' plans within the Anthem network.
Those negotiations are already underway, and the medically necessary coverage policy should pave a smooth path for reimbursement for Anthem members.
We also continue to secure contracts with key Blues' plans. This ensures that our test is reimbursed at a negotiated price per test, which is typically higher than the reimbursement rate that we are able to achieve through coverage alone. In this quarter, we executed 5 new contracts through Regence Blue Cross and Blue Cross of Kansas, increasing the number of contracted lives to 163 million, and supporting the continued expansion of our reimbursement rate.
Our third key success metric is evidence development. Evidence is the basis for what drives good science, and we believe will drive the future of improved health care. Our leadership in this age of evidence is shifting the focus from just Big Data, analytics and technology to answers that are trustworthy and actionable. To that end, during the quarter, numerous publications, posters and podium presentations provided new data supporting the Afirma, Percepta and Envisia Genomic Classifiers. This evidence reinforces that the answers we provide to physicians are actionable, improve outcomes for patients, and deliver cost savings to the health care system. Data from our pivotal clinical validation study of the Afirma GSC were featured just yesterday, at an oral presentation at the World Congress on Thyroid Cancer. The results showed that the GSC has the potential to save an estimated 70% of patients with benign nodules from unnecessary surgery just to get a diagnosis. This is a 30% improvement over our widely adopted GEC. The Afirma GSC's use of RNA sequencing and ensemble machine learning algorithms enables us to answer even more challenging clinical questions to benefit thyroid patients. The Afirma GSC significantly improves the classification of benign Hurthle cells with increased sensitivity from 12% to 59% for this difficult subclass of diagnoses.
Our new technology platform also provides classifiers for medullary thyroid cancer, the BRAF V600E variant and RET/PTC and RET/PTC3 fusions, all of which are highly specific for cancer. These results will provide important information to further guide physicians on the extent of surgery and treatment decisions for these patients.
Next, let's move to the evidence underlying our Percepta Genomic Classifier for lung cancer. We have published the results of 3 clinical validation studies to-date with 2 of these combined into one paper in the New England Journal of Medicine, along with one analytical verification and 2 clinical utility studies. During the second quarter, cost-effectiveness data were published in the Journal of Thoracic Oncology, which used Markov modeling to suggest that the Percepta classifier has the potential to significantly reduce invasive procedures following a Percepta classifier result of low risk for lung cancer, and that it was cost-effective.
We are conducting our prospective real-world clinical utility study, which has already enrolled 450 patients, and we are quite pleased that interim data show that the test is performing even better than predicted in clinical practice, saving nearly 50% of patients from invasive procedures.
And now, turning to Envisia. We are building a robust body of evidence for this unique product that detects usual interstitial pneumonia or UIP, a pattern whose presence is essential to the diagnosis of idiopathic pulmonary fibrosis without the need for surgery. This is important because many of these patients are severely compromised and surgery is often ill advised. There is a keen interest in the Envisia classifier among pulmonology specialists because of its ability to provide meaningful answers for this devastating disease to guide next steps.
Pivotal clinical validation data from our multi-center prospective BRAVE trial for the Envisia classifier were presented at the American Thoracic Society Conference in May. The finding showed that the test identified 2/3 of UIP cases with a high-degree of accuracy providing critical diagnostic information that today can often only be obtained through surgery. These data are being submitted for publication. We also expect publication soon of data demonstrating the test analytical verification, which were also presented at the ATS meeting this quarter.
And furthering the evidence library for the Envisia classifier, we now initiated the catalyst study, a retrospective multi-center study to evaluate the test impact on clinical decision-making once adopted. We are making great progress in developing the evidence that we believe will support a positive Medicare coverage decision for the Envisia classifier in 2018.
And finally, our fourth success metric is financial discipline. We grew our top line revenue and effectively managed our expenses. Our loss from operations improved 37%, and our cash burn improved by 41% over the prior year with cash burn for the quarter at $5 million. This strong financial discipline underscores our efforts to achieve cash flow breakeven by the end of 2018.
Before wrapping up, I'd like to leave you with some thoughts and additional color on how we're viewing the market opportunity for the Percepta classifier, and the potential of the underlying field-of-injury technology it is based on. And while we believe the thyroid market offers significant room for continued growth in our business, we believe the pulmonology market represents a far larger opportunity over the long term. Let's highlight a few of these points.
First, the market and unmet need that Percepta classifier addresses is very large and growing. There are an estimated 350,000 bronchoscopies performed each year in the U.S. to evaluate patients with suspicious nodules and legions that are found on CT scans. An estimated 60% of those are on patients considered to be at low-to-intermediate risk of lung cancer through clinical assessment, and up to 70% of the bronchs yield inconclusive results. We estimate 140,000 patients each year could benefit from the Percepta classifier to guide the decision to follow the patient with serial CT versus pursuing a more invasive costly strategy to get a diagnosis.
This opportunity equates to an estimated $500 million market opportunity today in the U.S. and is poised to grow significantly with the implementation of low-dose CT screening for at-risk individuals.
Second, the Percepta classifier integrates sufficiently into the current clinical pathway of care, which is important to drive adoption. As I just described, the Percepta classifier integrates into the workup pulmonologists do today. And it answers a specific question at the point of inconclusive results. Is this patient at low-risk of cancer? Which helps the physician determine who to safely watch with CT follow-up versus who will require a tissue biopsy to make a diagnosis. Physicians are embracing this positioning of the product, and our real-world data are supporting the decision-making value we had hoped to deliver. The reduction of costly, risky, invasive procedures. We like augmenting the physician's decision-making with data, and not trying to replace what they do today.
Third, we believe the biggest opportunity is to deploy the field-of-injury technology behind our Percepta classifier even earlier in the clinical pathway of care. The key to reducing lung cancer deaths is to find the cancer early when it is more treatable. We reported on the publication in the journal of the National Cancer Institute of the work by Dr. Avi Spira's Group at Boston University, which demonstrated the detection of the Percepta classifier signature in a noninvasive nasal swab. We believe the detection of the field of injury has the potential to identify individuals who may be at heightened risk for the development of lung cancer based on their pre-cancer genomic disruption from exposures to such things as smoking. These individuals would be candidates for early intervention. This concept has the potential to transform the detection of at-risk individuals as well as aid in the earlier diagnosis of lung cancer as well as other pulmonary conditions. We believe this could create a multi-billion dollar opportunity for the company someday.
As we move through the next 12 to 18 months, we plan to shift the focus of our R&D investments to further solidify our understanding of the potential this important technology has to the future of our business. Imagine being able to detect your risk of developing lung cancer with a simple nasal swab collected at the doctor's office or at your local pharmacy.
And on that note, I would like to turn the call over to Keith to provide a summary of our financial results for the second quarter.
Keith S. Kennedy - CFO
Thank you, Bonnie. Good afternoon, everyone. As Jackie mentioned earlier, in addition to our earnings release, you may find our financial presentation on our website at www.veracyte.com under Investors and then Events and Presentations. I plan to speak about our second quarter 2017 results and will reference the relevant pages in the financial presentation as I cover the highlights.
Turning to Page 2 of the presentation. The financial highlights for the second quarter of 2017 as compared to the second quarter of 2016 are as follows: Revenue of $18.4 million increased 25%. Afirma reported volume of 6,500 tests, increased 11%. Total operating expenses of $25 million declined 1%. Net loss of $7.3 million improved 35%. Net loss per share of $0.22 improved 45%.
Cash burn defined as net cash used in operating activities and net capital expenditures of $5 million, improved 41%, and we ended the quarter with $46.5 million in cash. We continue to drive operating leverage across the business. To illustrate this point, for the second quarter of 2017, we generated $3.7 million of incremental revenue over the prior year quarter. Our loss from operations improved $3.9 million and our cash burn improved $3.4 million. On a year-to-date basis, we generated $6.6 million of incremental revenue over the prior year period, while our loss from operations improved $6.1 million and our cash burn improved $6.6 million.
Turning to Slide 3. Second quarter 2017 revenue of $18.4 million included $15.9 million in revenue from genomic testing services, principally from our Afirma Genomic Classifier, $1.7 million from cytopathology services and $0.8 million in cash-based revenue. For the second quarter, we reported 6,500 Afirma Genomic Classifier reports, of which between 90% and 95% met our revenue recognition criteria. On average, we accrued between $2,400 and $2,500 for each test that met our criteria.
As disclosed in more detail in our revenue recognition footnote to our financial statements, we do not always have a written contract for a defined amount for each service we provide. Thus, one of the factors that we use to estimate the amount that we reasonably expect to collect for services delivered as payment history.
Due to cash collections and cash collection trends in excess of original estimates, we adjusted our accrual rates for tests performed in the second half of 2016 to reflect our actual experience. Thus, we recognized $1 million in revenue this quarter, of which $0.6 million we collected by June 30, 2017, and $0.4 million we expect to collect in future quarters. This adjustment does not impact the $2,400 to $2,500 that we accrued for Afirma, previously mentioned. As June 30 -- as of June 30, 2017, we have $11 million in accounts receivable, of which 90% is associated with tests reported in 2017. Our current day sales outstanding or DSOs, excluding cash revenue, is 65 days. In the second quarter, we delivered our first commercial test results for our Percepta Bronchial Genomic Classifier. Though we achieved a significant operational milestone for the company, we did not begin reporting test results until the last half of the quarter, and we did not recognize revenue in the second quarter for this product. As we said previously, we expect to recognize revenue for this product in the second half of this year.
We collected $16.7 million in cash in the second quarter, a 14% increase over the prior year quarter.
Now turning to Slide 6. We generated 62% gross margin in the second quarter, 60% if you exclude the effects of the revenue adjustment we just discussed, which is in line with our expectations. Cost of revenue grew 10%, in line with our 11% volume growth.
On Slide 7, we further break down the components of our operating expenses and show the percentage of revenue for each category. As Bonnie mentioned, we are investing in our sales force and marketing campaigns to support the anticipated growth in our business.
Slides 8 through 10, cover the trends in our net loss, cash burn and cash position. At June 30, 2017, we are ahead of plan with $46.5 million in cash on hand. As Bonnie mentioned, we're reaffirming our full year 2017 revenue guidance of $76 million to $84 million, and cash burn of $25 million to $27 million.
To achieve our revenue guidance, we must generate $41 million to $49 million in revenue in the second half of 2017 or 11% to 32% growth over the prior year period. The catalyst for this growth includes: The commercial adoption of our enhanced Afirma GSC; the commercial success and rate expansion from our managed care efforts; increase in market penetration through our relationship with Quest and its AmeriPath subsidiary; and the commercial adoption of our Percepta Bronchial Genomic Classifier.
To achieve our cash burn guidance, our net cash used in operating activities and net capital expenditures or cash burn in the second half of 2017, must be -- must be between -- sorry, $12 million to $14 million. The catalyst to achieve our cash burn guidance are revenue expansion, financial discipline and operating leverage.
I'll now turn the call back over to Bonnie for closing remarks.
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Before we go to Q&A, I'd like to take a moment to introduce Jackie Cossmon, our new Vice President of Investor Relations and Corporate Communication. For those of you who haven't met Jackie yet, I'm thrilled to introduce her. We care deeply about our active and ongoing communications with the financial community, and Jackie has joined us to ensure that we are best-in-class in this regard. She comes to Veracyte with over 20 years of Investor Relations experience in healthcare, has an MBA and is an Investor Relations charter holder. Please don't hesitate to reach out to Jackie if you have any questions or need further information about our business.
I would like to now ask the operator to open the call for questions.
Operator
(Operator Instructions) And our first question comes from Paul Knight of Janney Montgomery.
Paul Richard Knight - MD, Head of Healthcare Research & Senior Analyst
Regarding your discussion earlier, Bonnie, on the pulmonary market, regarding the 350,000 bronchs a year. What's your pricing thoughts on the Percepta test?
Bonnie H. Anderson - Co-Founder, Chairman and CEO
So our Medicare rate, we have not released specific rates, but we had said that it is very similar pricing to Afirma. And I think that, that value is upheld specifically because of the point in the clinical pathway that we chose to position the test. We like intervening, if you will, at the point where the current clinical of care pathway has inconclusive results, but the next step that we save is one that's invasive and risky and costly, so that our tests can achieve and we can develop the evidence to show that we're creating high value in that scheme of patient care. So I think, the savings of surgery in the pulmonology side are a little bit costlier than what we save in Afirma, but certainly, that price range is really upheld with the value that we will bring.
Paul Richard Knight - MD, Head of Healthcare Research & Senior Analyst
And then the next question would be regarding Afirma. The Quest relationship, what -- I think, the market is seeing JVs are -- that have not been as successful as hoped. What gives you confidence in that channel?
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Well, I'll give a little bit of perspective and then that's a great question to pass over to John Hanna, our Chief Commercial Officer, who has really been instrumental in pulling this together. I think what is exciting to us is that Quest has had a long-standing business in the thyroid endocrinology area. Many of you that have been around as long as me, remember the acquisition they made of Nichols Institute, which was one of the very first endocrinology testing laboratories. And so they certainly want to be seen as continued leaders in endocrinology. And we're pleased to be able to get access to Afirma as a market-leading product for their physicians. John, do you have anything to add?
John W. Hanna - Chief Commercial Officer
Yes, absolutely. Thanks for the question, Paul. I think as we've said previously, we really like the engagement with Quest at this point in the life cycle of the product because we've already reached near universal coverage for the Afirma test across the managed care market. And that enables the Quest reps to really go out and sell the product without any concern around reimbursement or managed care agreement and smooth the process to getting the samples into the lab. They read the cytology at the AmeriPath labs and then pass the molecular test on to Veracyte for testing. So we've got a real headwind. I'm sorry, not a headwind. We've got a real opportunity tailwind behind us as we go into the second half of the year now that the AmeriPath reps are all trained up on the product. They have a strong familiarity of the use of Afirma in there endo, ENT and radiology practices. And we expect that in the second half of 2017, we'll really see the volume move.
Operator
And our next question comes from Bill Quirk of Piper Jaffray.
William Robert Quirk - MD and Senior Research Analyst
Great. I guess, first just a couple of housekeeping questions for me. First off is thanks for the updated lives, contracted lives, but can just remind us the total lives under contract and then specifically, the Blues. And then, I guess, the second part to the housekeeping question is just the Percepta outcomes data, Bonnie, that you cited, the greater than 450 patients in there thus far. When is that expected to be totally complete? And then when would we expect to see the full data readout?
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Yes, so the interim data readout is expected to come out this year, and we will continue the study because as we have done for Afirma, having long-term follow-up and long-term outcomes from -- comes from establishing these registries and being able to follow data over time. So the data point that I gave on that real-world data and an interim point, showing that low-risk patients defined by Percepta, that we are reducing the invasive procedures on them by 50% is real data on a substantial number of patients, 450. I'll ask John, I think, what we said was our total contracted lives are now at 161 million, and the contracted Blues level, John?
John W. Hanna - Chief Commercial Officer
The contracted Blues lives is at 34 million, currently.
William Robert Quirk - MD and Senior Research Analyst
Okay, got it. And then just pivoting real quick to the next-generation sequencing version of Afirma. Can you talk about -- I realize it's not fully rolled out yet, we're initiating that. But can you talk a little bit about, I guess, the initial experiences from some of the physicians, have you been able to use the incremental data to win over some physicians that have may have been holding out and not adopting the previous version of Afirma?
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Yes, I think we're seeing a tremendous amount of enthusiasm. Just coming back myself from the World Thyroid Congress, I think, the market had anticipated Veracyte would be the first to bring a next-generation out that would be based on some of the newer advances in technology. And certainly, the sequencing platform -- the RNA sequencing platform gives us a really unique capability in combining probably the richest genomic data that can be collected cost-effectively today with our expertise on machine learning, which was deployed even in our first Afirma classifier and through all the products we've developed. And so that has resulted in a pretty significant improvement in the percent of patients tested that we will call benign, and that's the data point that the physicians see every week, when they send us samples. And more importantly, not only are we moving more of these patients into the benign bucket, but we're going to be able to help inform on other clinical questions, on those that are left behind that are suspicious or cancer. And so some of the fusions and variants that I pointed to are just taking advantage of the technology richness, and picking and choosing the variance we report that have some clinical significance already published in literature. John, any other color you can add on reactions from customers?
John W. Hanna - Chief Commercial Officer
Yes. Bill, I was at the conference this weekend with Bonnie, it was really amazing the volume of clinicians coming into the exhibit hall, wanting to talk about the new product, asking when they can get access to the new product. And one of the keys there and we had a number of scientific presentations at the meeting is around the management of these Hurthle cell lesions that Bonnie described previously in her script, where we go from about 12% to 15% specificity to over 50% specificity in calling those legions benign. And those are -- that's one of the most complex lesions that you can get out of a thyroid tumor that often cytopathologies and endocrinologists really struggle with. And so the improvement there and the performance of the product is something that has a lot of clinicians really excited about the Afirma GSC, and wanting to gain some experience with it. So we're really happy with that. We've gotten a lot of interest. We're queuing up customers to move them over on the platform. We're going to take a cautious approach to make sure that we do this in a very structured way, but it definitely is increasing demand and it's something that's new and exciting that gets our reps in the door and talking with clinicians and gets them excited about Afirma.
Bonnie H. Anderson - Co-Founder, Chairman and CEO
We certainly expect to bring some new folks over to this platform as well. Thanks for the questions.
Operator
And our next question comes from Puneet Souda of Leerink Partners.
Puneet Souda - Director, Life Science Tools and Diagnostics
Bonnie, if you could help us understand what are the next step for the nasal swab studies? It appears that it's a -- this is a completely noninvasive approach. And, I mean, do you think in the longer run, this could present a better avenue compared to liquid biopsy approaches since it's closer to the site of injury?
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Well, we're certainly enthusiastic with the technology. And I think the early data that has emerged out of the work from Dr. Spira's lab and others that he's been working with over the course of years is certainly quite intriguing. It's early, so there is a lot of work to be done. But we do have early evidence that the technology can detect the field of injury that potentially could pick up patients and advances them going on to develop cancer. This is an ideologic field of injury that many have talked about for years, but now the data that's emerging looks pretty encouraging and promising. So we're quite excited because, I think, that we chose the place to position Percepta in lung cancer workup where it is easiest to have a test that physicians want to adopt because you're giving them data at a point where they really have no data to decide what to do next. And of course, we pick that point because we can save downstream surgeries that are unnecessary. So we have a very solid economic value. But what we also know is first mover advantage in this space allows you to get deeply seated into a standard of care, and from there, we've always believed we could move either later in the process if we had control of the sample and other data would be helpful following the detection of patients with cancer. We have also always believed that moving earlier could be very valuable. But one of the challenges in trying to intervene at an earlier stage in the clinical pathway is that you need to be better than the way physicians classify risk today. And so we'll be looking at ways that perhaps this technology could come in, in a very, very early range of maybe better identify patients at risk and then look for ways to integrate it across the clinical pathway to improve both early at-risk detection as well as early detection of cancer. And over the next 18 months, we would expect to see more data emerge out of these efforts and we'll keep everyone posted.
Puneet Souda - Director, Life Science Tools and Diagnostics
Okay. And just briefly, in terms of the sales rep guidance that you have, and if you could frame that in the context of your cash burn guidance, how should we think about the pickup here? Obviously, you have Percepta and folks are excited about GSC already in place. So just give us a sense of how should we think about the sale force?
Keith S. Kennedy - CFO
We said previously that we're going to try to grow the sales force, 15 to 20 heads this year. And we expect to do that and we expect to have enough cash on hand to get through the point where we're cash flow breakeven.
Operator
(Operator Instructions) We do show a question from Amanda Murphy of William Blair.
Amanda Louise Murphy - Partner & Healthcare Analyst
I just had a questions on guidance, whether you're -- so you did talk a bit about the range of expectations in terms of growth on the top line. So I was wondering you've got some moving parts there in terms of Anthem potentially benefiting as you signed the contracts individually and then obviously Percepta. So I was wondering if you could help us understand kind of where you think the drivers could fall? Is it more Percepta, for example, or is it more Anthem? And then just kind of help us think about the range there? It is a little bit broad in terms of the back half ramp there growth (inaudible).
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Yes, I think for now we chose to leave the range, which maybe felt a little bit broad in the business. We said it that way at the beginning of the year because a lot of the uncertainties in all these series of catalysts that you've just mentioned. GSC getting launched and the adoption and pickup. Quest getting fully up and running and how well they will do at bringing this, their clients over to this new product. And of course, Percepta, and these were all back end-of-the-year catalysts. And so we think for now we leave the range as it is, and perhaps as we get closer to coming off of maybe our Q3 call, we'll be able to provide a little more clarity on where that range ends up at the end of the year. Keith?
Keith S. Kennedy - CFO
Yes, I agree with all that. I think we're having a lot of momentum on the managed care in the contracting side. And I think last year, we'd spent a lot of time on the coverage, obtaining coverage and this year we're spending a lot more time on the contracting side. And that will make a lot of things simpler in terms of the back end of the process by getting feet on the street and really covering the United States is something we're focused in on, and getting that headcount up and the right people trained is really important to us as we -- especially as we roll into 2018 and we're really excited about 2018.
Amanda Louise Murphy - Partner & Healthcare Analyst
Okay, got it. And then there's been some discussion around PAMA just in terms of, obviously, proposals and maybe try and delay that a bit and whatnot. And I think for you guys, just given the differential in payment rates, it could potentially be a positive for you. So I just wondering if you could give a little bit of an update there on what the expectations are. I think some of the larger labs talked about the broader industry proposals, but specifically what you -- I guess, what your perspective is on that front?
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Well, I'm definitely going to hand that one to John Hanna. I think he is one of our industry experts on all this. So John?
John W. Hanna - Chief Commercial Officer
Yes. Thanks, Amanda. We don't anticipate any delay in the implementation of PAMA currently. CMS hasn't signaled that they intend to delay the rule -- implementation of the rule. As far as we've heard from most stakeholders, the data collection process went smooth, it was smooth for us. And we intend on commenting in the rule-making cycle here as they've asked for feedback from providers that participated in it that, we feel the process went as was intended.
Amanda Louise Murphy - Partner & Healthcare Analyst
Okay. Got it. And then just last one and I'm sorry if you've said this. But have you talked about, it's obviously a little bit early on Percepta and you've got Medicare coverage. But have you talked about what your thoughts are on around kind of private reimbursement on the Percepta line?
John W. Hanna - Chief Commercial Officer
Yes, absolutely. As Bonnie mentioned earlier, with Percepta, the cost of a lung surgery is significantly higher than even what we see in the thyroid surgery space. And so the value proposition around Percepta enabling half of patients with nondiagnostic bronchoscopies to avoid those invasive procedures is incredible. And so we believe we've a very strong value story with Percepta. And we're going to first start with engaging with our payers where we have managed care contracts already in place on Afirma, we have strong relationships and we intentionally build those relationships as we add these follow-on products, be it Percepta, Envisia and hopefully, the nasal classifier at some point down the road, we can roll the products into those managed care agreements and lock up great rates for the products and get them accessible to physicians really fast.
Operator
And I'm showing no further questions at this time. I would now like to turn the conference back to Bonnie Anderson for closing remarks.
Bonnie H. Anderson - Co-Founder, Chairman and CEO
Thank you all, again, for joining us today and for your continued support of Veracyte. We look forward to updating you on our progress next quarter. Thank you.
Operator
And ladies and gentlemen, this concludes today's conference. Thank you for your participation, and have a wonderful day.