
Greg Sgrosso
Greg Sgrosso is a principal and consulting actuary with the Atlanta office of Milliman. He joined the firm in 2002.
Experience
Greg has had the opportunity to work on many different projects through his tenure at Milliman. He is the certifying actuary for clients in the Medicare Advantage space and has extensive experience with claims reserves analysis, Medicare Advantage feasibility studies, rate filings, premium deficiency reserves, vendor selection, claims repricings, and other aspects of risk management. Greg also has had significant exposure to work with continuing care retirement communities. He has performed population projections, adequacy of resident contract fee structures, future service obligation calculations, actuarial balance sheets, cash-flow projections, and experience studies. Greg also leads the intern program and actuarial recruiting for the practice.
- Moderator for Milliman Medicare Advantage Webinars
- State of the Medicare Advantage industry: A year moving forward. February 2026.
- Did you VBID your MA bid? A discussion of insights and challenges as we prepare for 2026 Bids. December 2024.
- Walking on eggshells? Looking at the Past, Present and Future of Employer Group Waiver Plans. October 2023.
- Medicare Revenue: The All-Star Game. November 2022.
- What's not so negative about Part D. February 2022.
- Emerging Trends in the 2022 Medicare Advantage Market. December 2021.
- Risky business: How risk adjustment and risk scores impact Medicare Advantage plans. February 2021.
- "Medicare Advantage organizations: Financial results for 2024." Milliman Research Report, October 2025.
- "Medicare Advantage organizations: Financial results for 2023." Milliman Research Report, December 2024.
- "Medicare Advantage organizations: Financial results for 2022." Milliman Research Report, November 2023.
- "Medicare Advantage organizations: Financial results for 2021." Milliman Research Report, November 2022.
- "Medicare Advantage organizations: Financial results for 2020." Milliman Research Report, January 2021.
- Medicare Advantage: Looking back and looking forward... 2022 SOA Health Meeting.
- "Medicare Advantage financial results for 2019." Milliman Research Report, December 2020.
- Reserving 101 for Health Actuaries. 2019 SOA VAL ACT Meeting.
- CMS Medicare Advantage Quality STAR Ratings. 2018 SEAC Meeting.
- Future of Medicare Advantage: Trends of an Expanding Market. 2018 SOA Health Meeting.
- "Reasons to Reconcile." SOA Health Watch, February 2018.
- Professionalism: Peer Review. 2016 SOA VAL ACT Meeting.
- Medicare Advantage Star Rating Improvements, Maintenance & Impossibilities. 2016 SOA Health Meeting.
- Fellow, Society of Actuaries
- Member, American Academy of Actuaries
- BA, Economics, Duke University
- Master’s degree, Arts and Teaching – Math Education, Boston University