Medicare Advantage in Merced County, California
12,185 people in Merced County, California were enrolled in Medicare Advantage in October 2026, 28.3% of 43,003 eligible beneficiaries (+1.6 pts since October 2025). Imperial Health Plan of California is the largest parent organization with 38% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,665 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 343 members here are in plans that terminate or leave the county, and Kaiser Foundation Health Plan, Inc., SCAN Group, SANTA CLARA COUNTY HEALTH AUTHORITY leave. MA plans offered go from 8 to 8.
Parent organizations in Merced County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Imperial Health Plan of California | 4,644 | +1,178 | 38.4% |
| Alignment Healthcare USA, LLC | 3,304 | +801 | 27.3% |
| UnitedHealth Group, Inc. | 2,299 | −475 | 19.0% |
| California Physicians' Service | 1,037 | −637 | 8.6% |
| Elevance Health, Inc. | 238 | −140 | 2.0% |
| SANTA CRUZ MONTEREY MERCED SAN BENITO MARIPOSA MAN | 184 | new | 1.5% |
| Kaiser Foundation Health Plan, Inc. | 140 | −17 | 1.2% |
| Golden Valley Health Centers | 126 | +66 | 1.0% |
| CVS Health Corporation | 53 | 0 | 0.4% |
| SCAN Group | 52 | new | 0.4% |
| SANTA CLARA COUNTY HEALTH AUTHORITY | 16 | +1 | 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 7,340 beneficiaries in Merced County were assigned to 60 Medicare Shared Savings Program ACOs, 33.4% of assignable Original Medicare beneficiaries. Together, roughly 52% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.