Medicare Advantage in San Benito County, California
1,701 people in San Benito County, California were enrolled in Medicare Advantage in October 2026, 14.8% of 11,463 eligible beneficiaries (−1.3 pts since October 2025). Imperial Health Plan of California is the largest parent organization with 61% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 3,981 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 60 members here are in plans that terminate or leave the county, and Kaiser Foundation Health Plan, Inc., SANTA CLARA COUNTY HEALTH AUTHORITY leave. MA plans offered go from 2 to 2.
Parent organizations in San Benito County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Imperial Health Plan of California | 998 | +381 | 60.6% |
| UnitedHealth Group, Inc. | 175 | −17 | 10.6% |
| Elevance Health, Inc. | 156 | +6 | 9.5% |
| Kaiser Foundation Health Plan, Inc. | 118 | −1 | 7.2% |
| California Physicians' Service | 106 | +13 | 6.4% |
| CVS Health Corporation | 33 | −497 | 2.0% |
| SANTA CRUZ MONTEREY MERCED SAN BENITO MARIPOSA MAN | 28 | new | 1.7% |
| SCAN Group | 17 | new | 1.0% |
| SANTA CLARA COUNTY HEALTH AUTHORITY | 15 | −1 | 0.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 3,252 beneficiaries in San Benito County were assigned to 28 Medicare Shared Savings Program ACOs, 52.4% of assignable Original Medicare beneficiaries. Together, roughly 59% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.