Thanks, Scott, and good afternoon, everyone. First quarter financial results reflect our strong execution and high investments in our Medicare marketing and telesales efforts, continued improvements in Medicare online sales activity, and the positive impact of the Medicare Advantage open enrollment period on our business. In our Medicare business, our first quarter revenue of $54.9 million grew 78% compared to a year ago. This strong growth was driven primarily by a 69% year-over-year increase in approved Medicare members and to a lesser degree by growth in non-commission revenue. The Medicare segment generated a profit of $10.8 million, an increase of 240% compared to the first quarter of 2018 driven by fixed cost leverage and lower agent costs per approved member from enrolling more members online compared to a year ago. Our estimated number of revenue generating Medicare members was approximately $504,000 at the end of the first quarter, up from approximately $382,000 at the end of the first quarter of 2018 or an increase of 32%. First quarter 2019 revenue from our individual family and small business segment was $13.9 million, a 13% increase compared to a year ago. This increase was driven by growth in commission revenues generated by the individual and small business products and growth in non-commission revenues primarily related to sale of leads. As Scott mentioned, we are seeing higher than expected retention in some of the older cohorts of our individual and family plan members. Pursuant to the 606 revenue recognition accounting standard, we recognize any residual revenue or [indiscernible] revenue in the quarter when cumulative cash collected from these cohorts exceeds the initial revenue that we booked at the time when these members first enrolled through eHealth. As a result, in some quarters our individual and family plan commission revenue might grow driven by residual revenue from existing members even as the number of new enrollments is declining. The individual family and small business segment remained profitable on a standalone basis for the first quarter generating segment profit of $6 million compared to $3.5 million in the first quarter of 2018. Our estimated individual and family plan membership at the end of the first quarter was approximately 130,000, down 29% compared to the estimated membership we reported at the end of the first quarter a year ago. The estimated number of members on small business products was approximately 43,000, a 21% increase compared to a year ago. Our total revenue for the first quarter was $68.8 million, an increase of 60% compared to the first quarter of 2018.Our total estimated membership at the end of the quarter for all products combined was approximately 952,000, including approximately 275,000 estimated members on ancillary products. Now I would like to take -- like to review our operating expenses and profitability metrics. In the first quarter, we made significantly larger investments in Medicare related marketing activities and telesales capacity compared to the first quarter of 2018. Including flex capacity, our peak first quarter agent headcount was approximately 80% higher compared to a year ago. This increase in headcount allowed us to invest more aggressively in marketing, especially in digital marketing initiatives. The overall variable cost per approved Medicare remember, which includes marketing and customer care related spend, increased slightly by 6% year-over-year demonstrating our ability to generate significant enrollment growth while preserving member profitability. Underneath that, variable call center costs per approved Medicare member declined 2% year-over-year as we transacted more enrollments online. Marketing costs per approved member grew 16%. For full-year 2019, we continue to expect that total variable acquisition costs per approved member for Medicare will remain relatively flat compared to 2018. On the fixed cost side, both G&A and tech and content expenses grew at single-digit percentage rates, significantly lower compared to our year-over-year revenue growth reflecting operating leverage in our business model. First quarter non-GAAP operating costs; which excludes stock-based compensation, acquisition costs, restructuring charge, change in fair value of earnout liability, and amortization of intangibles; were 89% of revenue compared to 104% of revenue for the first quarter of 2018. Adjusted EBITDA for the first quarter of 2019 was $8.6 million compared to a negative $1.2 million for the first quarter 2018.We calculate adjusted EBITDA by adding restructuring charges, acquisition costs, stock-based compensation, change in fair value of earnout liability, depreciation and amortization, amortization of acquired intangibles, other income, and benefit for income taxes to our GAAP net income. GAAP net loss for the first quarter of 2019 was $5.2 million compared to a GAAP net loss of $4.8 million for the first quarter 2018. First quarter GAAP net loss includes a non-cash charge of $13.3 million related to an increase in fair value of the earnout liability assuming connection with eHealth's acquisition of GoMedigap. The increase was driven by eHealth's share price appreciation. First quarter GAAP net loss per diluted share was $0.24 compared to a net loss per share of $0.26 for the first quarter of 2018. Non-GAAP net income per diluted share was $0.33 compared to a net loss per share of $0.07 for the first quarter of 2018.Our first quarter cash flow from operations was $12.7 million compared to $10.7 million for the first quarter of 2018. Our trailing 12 months cash flow from operations for the period ending March 31st was negative $1.2 million, a significant improvement compared to negative $13.2 million for the 12-month period ending March 31st, 2018. Given the seasonality of our business, it is helpful to look at our cash flows using April through March cycle as the our AEP related cash expenses, which are incurred in the fourth quarter with cash collections for AEP related enrollments that are spread between Q1 and -- Q4 and Q1. As we discuss cash flow dynamics in the future, we will guide investors to look at this April through March annual cycle as we believe it more accurately reflects the true annual cash flow dynamics of the business. We are currently guiding to negative $20 million to $25 million in cash flow from operations for the full calendar year 2018 -- 2019 with strong Medicare enrollment growth amplifying the impact of the time lag between AEP related cash spend and cash collection. However, correcting for this line by using April to March cash cycle, we expect to be cash flow positive for the 12 months ending March 31st, 2020. Capital expenditures, which include capitalized internally developed software costs, were approximately $3 million for the first quarter. Our cash balance was $135.5 million as of March 31st and we had no debt outstanding under our line of credit. Our balance sheet also reflects a significant commissions receivable balance of $328.2 million that is comprised of $113.8 million that we expect to collect over the next 12 and $214.4 million in long-term commissions receivable. We are increasing our 2019 annual guidance to reflect our outperformance to-date and our current plans for Medicare related investments for the rest of the year. We are now forecasting revenues for 2019 to be in the range of $315 million to $335 million compared to our prior guidance range of $290 million to $310 million. Medicare segment revenues are now expected to be in a range of $281 million to $297 million compared to the prior guidance of $256 million to $272 million. Guidance for 2019 Individual, Family and Small Business segment revenue range is unchanged at $34 million to $38 million. Assuming the impact of the non-cash charge related to the increase in fair value of the earnout liability in connection with eHealth's acquisition of GoMedigap remains at $13.3 million. We expect GAAP net income for 2019 to be in the range of $15 million to $20 million compared to prior guidance range of $16.3 million to $21.3 million. We expect 2019 adjusted EBITDA to be in the range of $55 million to $60 million compared to prior guidance range of $45 million to $50 million. 2019 Medicare segment profit is now expected to be in the range of $90 million to $94 million compared to prior guidance range of $80 million to $84 million. Guidance for the 2019 Individual, Family and Small Business segment profit remains unchanged at breakeven to $1 million. Guidance for corporate shared service expenses, excluding stock-based compensation and depreciation and amortization expense, remains unchanged at approximately $35 million. Assuming the impact of the non-cash charge related to an increase in fair value of the earnout liability in connection with the GoMedigap acquisition remains at approximately $0.53 per share, GAAP net income per diluted share for 2019 is expected to be in the range of $0.60 to $0.79, which is unchanged. Non-GAAP net income per diluted share for 2019 is expected to be in the range of $1.54 to $1.73 compared to prior guidance range of $1.11 to $1.25 per share. Cash used in operations for 2019 is expected to be in the range of $20 million to $25 million compared to prior guidance range of $17 million to $20 million. Cash used for capital expenditures is expected to be $13 million to $14 million, which is unchanged. Well, I like to point out that in addition to revise revenue and earnings projections, these updated ranges reflect our re-forecast in terms of fully diluted shares. Our initial guidance that we provided on the fourth quarter and full-year 2018 earnings call conservatively contemplated approximately 27 million average fully diluted shares outstanding for the purpose of calculating 2019 income per share. Now that we have finalized our 2019 hiring plans as well as projections for employee equity compensation, which reflect among other things a recent increase in eHealth share price, we expect to average the number of fully diluted shares for 2019 to be approximately 25 million. Finally, I would like to make some comments with respect to the seasonality that we expect this year. The second and third quarters of 2019 are expected to benefit from the higher full-time Asian headcount that we are retaining this year. Second quarter in particular has an easy revenue comparison with last year when we are still in the process of rationalizing our Medicare call center capacity after closing our Westford base facility in February of 2018. The fourth quarter will continue to be -- contribute disproportionately to revenue for the year driven by the timing of the annual enrollment period and the open enrollment period selling season. At the same time, we will have a comparison of Q4 last year, which was extremely strong in terms of Medicare revenue and enrollment. The full-year 2019 revenue growth rate of approximately 29% at the midpoint of our revised guidance reflects this dynamic and our current view of investments in the fourth quarter. We continue to refine our sales and marketing investment plans for the fourth quarter and expect to finalize those plans in the next three months. Turning to profitability. In 2019 we are retaining a larger number of in-house Medicare agents throughout the year compared to 2018, including during the seasonally slower third -- second and third quarters. We also plan to make targeted hires in our technology group to support our online and mobile enrollment initiatives. We are currently expecting that our second quarter EBITDA loss will be at least at the same level as last year in absolute terms and our third quarter EBITDA loss could be higher than last year's. The fourth quarter will remain seasonally largest in terms of revenue, enrollments, and profitability. For the full year, we expect to generate EBITDA margin of approximately 18% at the midpoint of our guidance compared to 13% in 2018. The EBITDA margin expansion implied by our guidance is driven primarily by continuing leverage that we expect to see in our fixed costs as we grow enrollments and expand our revenue base. As I mentioned earlier, full-year 2019 acquisition costs per approved Medicare member including marketing and call center costs are expected to be relatively flat with 2018. We continue to base our guidance on the assumption of flat lifetime values or LTVs compared to a year ago. As Scott mentioned, we look forward to seeing many of you at our Investor Meeting in New York on May 7 where in addition to sharing more detailed operational information, we will also provide additional financial information including an update to our long -term financial plan, which reflects our recent strong performance and outlook for the coming years. I want to remind you that these comments and our guidance are based on current indications of our business and our current estimates, 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 undertake no obligation to update our comments or our guidance. And now, we will open the call for questions. Operator?