MA Enrollment Explorer / Parent organizations / Hawaii Medical Service Association
Hawaii Medical Service Association: Medicare Advantage enrollment and market share
Hawaii Medical Service Association had 43,485 Medicare Advantage members in October 2026, #63 nationally with 0.12% of all MA enrollment. It gained 4,117 members (+10.5%) since October 2025, and has enrollment in 4 states and 10 counties with 11 or more members. In the 2026 Annual Election Period (December to February) it lost 58 members (−0.1%). For 2027, 15,884 of its members are in plans that terminate and 29 in plans leaving their county.
43KMA members, October 2026
+10.5%change since October 2025 (+4,117)
0.12%national MA share, rank 63
2contracts with enrollment
Largest states
| State | Members | Share of state MA |
|---|---|---|
| Hawaii | 42,793 | 25.3% |
| Nevada | 120 | 0.0% |
| California | 67 | 0.0% |
| Washington | 24 | 0.0% |
Largest counties
| County | Members | Change since October 2025 | Share of county MA |
|---|---|---|---|
| Honolulu County, HI | 29,566 | +2,908 | 25.9% |
| Hawaii County, HI | 7,713 | +315 | 29.6% |
| Maui County, HI | 3,588 | +749 | 17.7% |
| Kauai County, HI | 1,926 | +123 | 22.3% |
| Clark County, NV | 120 | +35 | 0.0% |
| Los Angeles County, CA | 24 | −11 | 0.0% |
| King County, WA | 24 | +6 | 0.0% |
| Orange County, CA | 17 | +2 | 0.0% |
| San Diego County, CA | 15 | −1 | 0.0% |
| Alameda County, CA | 11 | −3 | 0.0% |
| Pierce County, WA | 0 | −11 | 0.0% |
| Faleasao, AS | 0 | −18 | n/a |
Contracts
| Contract | Plan type | Oct 2024 | Oct 2025 | Oct 2026 |
|---|---|---|---|---|
| H3832 HMSA Akamai Advantage | Local PPO | 36,375 | 39,368 | 38,630 |
| H8481 HMSA Akamai Advantage Dual Care | Local PPO | n/a | n/a | 4,855 |
Star ratings for these contracts are in the MA Quality Dashboard.