Thanks Scott and good afternoon, everyone. On today's call, I will go over our 2019 financial results in great detail and provide our 2020 annual guidance, eHealth's fourth quarter and full year 2019 financial results reflect our strong execution and significant investments in Medicare related telesales capacity and marketing initiatives throughout the year as we continue to scale our Medicare business achieving strong revenue and enrollment growth, while expanding margins. Our results also included the impact of enhancements made to our Medicare Advantage lifetime value forecasting model that will enable us to better estimate lifetime values of our Medicare Advantage plans. During the fourth quarter, we work with an external corporate valuation consultant to assess our existing approach and incorporate statistical tools to increase the accuracy of our Medicare Advantage plans lifetime value estimates with an emphasis on improving our member retention forecasting. Since the adoption of ASC 606 for revenue recognition, our cash collections for Medicare Advantage plans have in general exceeded initial estimates suggested by our lifetime value model, reflecting the conservatism of our approach. This dynamic has contributed in the past quarters to the recognition of increasing amounts of residual or tail revenue from Medicare Advantage members approved in prior periods. At the same time, we have limited visibility into the precise timing of detail revenue recognition. Under our model, we were assessing residual revenue in the quarter when the entire commission receivable on a Medicare Advantage cohort had been fully collected. The exact timing of that final collection can be difficult to predict. Our enhanced model addresses this forecasting concern. To enhance model that we now have implemented uses a modified Kaplan-Meier statistical model rather than historical two year moving averages for the purpose of estimating Medicare and member retention. It is expected to result in lower volatility of our Medicare advantage lifetime value estimates and also provide for more predictable forecasting of residual revenue. We incorporate all relevant historical data into the model with larger weight placed on the most recent three years of observations to improve the accuracy of our lifetime value estimates. Going forward, we'll be assessing and booking residual revenue on each Medicare Advantage plan cohort when there is strong statistical evidence it would not result in probable reversal of revenue in the future. Currently for Medicare Advantage plans this would be around three years from the time of enrollments. Three years is about the average life of our Medicare Advantage plans and also represents a mark after which we observed significant decline in retention variability for the remainder of the cohort's life. Our fourth quarter financial results reflect a $42.3 million positive revenue impact from the change in estimate for expected cash commission collections for Medicare Advantage plans since we begin selling such products and through the third quarter of 2019. Total fourth quarter 2019 tail revenue related to Medicare Advantage plans was $50.8 million. It's important to note that even excluding the positive impact from the enhancement of the Medicare Advantage LTV model eHealth significantly outperformed our 2019 revenue, GAAP net income and adjusted EBITDA guidance. And now I will review our fourth quarter and full year 2019 financial results. In the Medicare business, our fourth quarter revenue was $282.6 million excluding the $42.3 million impact from the enhancement of the Medicare Advantage lifetime value model, fourth quarter Medicare revenue was $240.3 million, representing a 98 year-over-year growth. Full year 2019 Medicare revenue was $447 million. Excluding the impact of enhancement of the MA LTV model, our full-year Medicare revenue was $404.7 million or a 92% growth compared to a year ago. The strong growth was driven by a combination of growth and approved Medicare members and an increase in noncommissioned revenue in particular revenue generated from our Medicare plan advertising program. For the fourth quarter of 2019, the Medicare segment generates a profit of $149.3 million. Excluding the impact from enhancement of the MA LTV model, Medicare segment profit was $107 million, an increase of 82% compared to a year ago. For the full year 2019, Medicare segment profit was $155.2 million or $112.9 million excluding the impact from the enhancement of an MA LTV model. The estimated number of revenue generating Medicare members was approximately $711,000 at the end of the fourth quarter of 2019 up from $487,000 at the end of fourth quarter of 2018 or an increase of 46%. As Scott noted, our 2019 Medicare membership grew well ahead of the overall Medicare enrollments as reported by the CMS. I would also like to address the dynamics in constraining lifetime values of our Medicare members. During the fourth quarter, we continue to observe favorable changes and retention rates for the Medicare Advantage cohort that was enrolled into annual enrollment periods in the fourth quarter of 2018. In combination with higher commission rates in 2019 compared to 2018 and a positive impact from enhancements to our forecasting model, this contributed to a 2% increase in fourth quarter and a 5% increase in full year 2019 Medicare Advantage LTVs compared to a year ago. Fourth quarter and full year Medicare supplement LTVs both declined by 6% compared to 2018. This was primarily driven by slight decline retention rates in this book of business. Fourth quarter 2019 revenue from our individual family and small business segment was $19.1 million; a 44% increased compared a year ago. Full year 2019 revenue in this segment was $59.2 million, a 45% increase compared to 2018. Revenue growth was driven primarily by higher lifetime values for individual and family plan and short-term products, as well as residual or tail revenue from our existing individual and family plan members. This was partially offset by a decline in the number of approved members on individual small business group and related ancillary products as we continue to focus our investments in the Medicare business. The individual family and small business segment remain profitable on a standalone basis generating segment profits of $23.4 million for the four-year and $8.3 million for the fourth quarter 2019. Our estimated individual and family client membership at the end of fourth quarter was approximately 128,000 down 15% compared to the estimated membership we reported at the end of fourth quarter a year ago. The estimated number of members on small business products was approximately 43,000 at the end of the year, a 9% increase compared to a year ago. Total revenue for fourth quarter, $301.7 million, excluding the $42.3 million impact on the enhancement of the MA LTV model. Fourth quarter revenue was $259.4 million, an increase of 92% compared to the fourth quarter of 2018. Revenue for the full year 2019 was $506.2 two million, excluding the impact on enhancement of the MA LTV model revenue for the full year 2019 was $463.9 million, an 85% increase compared to 2018. Now I will review our operating expenses and profitability metrics. In 2019, we delivered meaningful margin expansion for the second year in a row. 2019 adjusted EBITDA margin excluding the positive impact of enhancement of an MA LTV model was 20% compared to 13% in 2018, reflecting fixed cost leverage as we grew our revenue base. Including the impact of an enhancement of the MA model, our 2019 adjusted EBITDA margin was 26%. At the same time variable marketing cost per approved member in our Medicare business increased as we invested for accelerated enrollment growth and market share expansion leading to higher costs for select initiatives within our direct and partner channels. A larger contribution from online advertising channels which on average have higher acquisition costs also led to an increase in marketing costs of acquisition. 2019 variable marketing costs per approved Medicare member grew 11% compared to a year ago. Customer care and enrollment cost per approved Medicare member grew 13% in 2019 compared to 2018. Similar to marketing costs, this annual increase reflects our significant investment in growth of our Medicare business. First in 2019, we made a decision to retain a larger number of agents during our low volume second and third floors and it started to hire in trained agents early in the year ahead of the annual enrollment period with a goal of increasing their productivity during the critical selling season and to accommodate our marketing initiatives during the special enrollment period. In addition during the annual enrollment period, we incur agent overtime costs during peak volume times and also saw longer than average call times reflecting increased selection and complexity of Medicare Advantage plans. Finally, our 2019 customer care enrollment costs include expenses related to opening of our new telesales center in Indianapolis. Adjusted EBITDA for the fourth quarter of 2019 was $142.6 six million or $100.3 million excluding the impact from the enhancement of the MA LTV model compared to $51.9 million for the fourth quarter of 2018. Full year 2019 EBITDA was $133.2 million or $90.9 million excluding the impact from enhancement of the MA LTV model compared to $33.7 million for the full year 2018. We calculate adjusted EBITDA by adding restructuring charges, acquisition costs, stock based compensation, change in fair value of our earnout liability, depreciation and amortization including the amortization of acquired intangibles, other income and provision and benefit for income taxes to our GAAP net income. Including the impact from enhancement of an MA LTV model, our fourth quarter 2019 GAAP net income was $88.8 million compared to $26.1 million in the fourth quarter of 2018. Full year 2019 GAAP net income was $66.9 million compared to $0.2 million in 2018. Excluding the impact from the enhancement of the MA LTV model, our fourth quarter and full year 2019 nine net income would have been lower. Our fourth quarter 2019 cash flow from operations was negative $56.8 million compared to a negative $8.7 million for the fourth quarter of 2018. For the full year 2019, cash flow from operations was negative $71.5 million, reflecting significant investments in our Medicare enrollment growth which accelerated in 2019 relative to growth rates we posted in 2018. I would like to remind you that while we pay the vast majority of our member acquisition expenses in the same quarter when we generate enrollments, most carriers do not paid conditional commissions associate with enrollments during the annual enrollment period until January of next year when those policies become effective. The impact of this timing our cash cycle was exaggerated in 2019 as we share on the fourth quarter call a year ago in 2018, we saw some commission payments relate to our annual enrollment period enrollment come in earlier than we expected with a small percentage of payments being pushed out into the first quarter compared to historical patterns. This development had a beneficial impact in 2018 but had a negative impact on a cash flow from operations in 2019. In January 2020, we received approximately $59 million in commission payments related to the fourth quarter 2019 enrollments. Capital expenditures which include capitalized internally developed software costs were approximately $16.9 million for full year. Our cash balance was $26.8 million including restricted cash and we had no outstanding debts. We ended the year with commission receivable balance of $589 million. And now I would provide our 2020 annual guidance. We are forecasting revenue for 2020 to be in a range of $580 million to $620 million with Medicare segment revenue in a range of $533 million to $569 million, an individual family and small business segment revenue in a range of $47 million to $51 million. We expect GAAP net income for 2020 to be in a range of $68 million to $83 million. We expect 2020 adjusted EBITDA to be in a range of $120 million to $135 million. 2020 Medicare segment profit is expected to be in the range of $152 million to $169 million and individual family and small business segment profit is expected to be in a range of $17 million to $18 million. Corporates share services excluding stock-based compensation and depreciation and amortization expense is expected to be in the range of $49 million to $52 million. GAAP income per diluted share for 2020 is expected to be in a range of $2.64 to $3.23 per share. Non-GAAP income per diluted share for 2020 is expected to be in the range of $3.56 to $4.09 per share. Cash used in operations is expected to be in a range of $52 million to $55 million and cash used for capital expenditures is expected to be $18 million to $20 million. At the midpoint our 2020 revenue guidance implies a 29% growth compared to our 2019 revenue excluding the $42.3 million positive impact due to enhancement of the Medicare Advantage lifetime value model. This growth is expected to be driven primarily by Medicare enrollment growth. Similar to last year, our 2020 guidance assumes no improvement in Medicare lifetime values. Based on the midpoint of our adjusted EBITDA guidance, we expect to generate a margin of 21%, a margin expansion of approximately 150 basis points compared to our 2019 adjusted EBITDA margin of 20% after excluding a positive impact of the $42.3 million from the enhancement of the MA LTV model. This margin expansion expected to be driven primarily by continuing leverage in our fixed costs. At the same time, we will continue to invest for growth in our telesales capacity marketing with combined marketing and customer care enrollment expenses growing roughly in line with projected 2020 revenue growth. On a per approved member basis in our Medicare business, we expect to drive improvements in customer care enrollment cost in 2020 to an increased contribution from fully unassisted online enrollments to total Medicare applications. Further leverage from our agent facing technology tools and managing for stronger cost efficiencies in our outsourced telesales model. Marketing costs per approved Medicare member expected to stay roughly in line with 2019 levels. Finally, I would like to make some comments with respect to the seasonality we expect this year. We're currently expecting a similar pattern in terms of each quarter's percentage contribution total annual revenue as in 2019, excluding the impact of enhancement of our MA LTV model during the fourth quarter of 2019. The fourth quarter will continue contribute disproportionately to revenue and earnings driven by the timing of Medicare annual enrollment period and Obamacare open enrollment period selling seasons. In a first quarter of 2020, we expect adjusted EBITDA to be relatively flat compared to the first quarter of 2019. I want to remind you that these comments in our guidance are based on current indications of our business and our current estimate, assumptions and judgments which may change at any time. Our actual results may differ as a result of changes in our estimates, assumptions and judgments. We take no obligation to update our comments or our guidance. In conclusion, we ended 2019 on a strong note delivering record performance during the annual enrollment period and expanding our share of the Medicare market. We're now pacing well ahead of our five-year financial plan that we share investors in May of 2019 and anticipate updating our long-term projections later this year. With that I'll turn it back to the operator for questions.