Medicare Advantage in Los Angeles County, California
987,690 people in Los Angeles County, California were enrolled in Medicare Advantage in October 2026, 57.1% of 1,728,391 eligible beneficiaries (+0.2 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 35% of reported enrollment; 37 parent organizations have 11 or more members and the HHI is 1,737 (moderately concentrated). HRSA classifies the county as partly rural. For 2027, 58,237 members here are in plans that terminate or leave the county, and Community Health Group, INLAND EMPIRE HEALTH PLAN, Orange County Health Authority leave. MA plans offered go from 74 to 70.
Parent organizations in Los Angeles County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 342,678 | +11,730 | 34.8% |
| SCAN Group | 149,760 | +34,604 | 15.2% |
| Elevance Health, Inc. | 113,647 | −13,482 | 11.5% |
| UnitedHealth Group, Inc. | 78,898 | −21,828 | 8.0% |
| Alignment Healthcare USA, LLC | 49,077 | +9,515 | 5.0% |
| Humana Inc. | 42,479 | +3,488 | 4.3% |
| Centene Corporation | 36,131 | −6,253 | 3.7% |
| California Physicians' Service | 34,031 | −4,577 | 3.5% |
| Clever Care Health Plan, Inc. | 33,891 | +14,428 | 3.4% |
| Local Initiative Health Authority for LA County | 30,429 | +1,027 | 3.1% |
| CVS Health Corporation | 21,057 | +1,610 | 2.1% |
| Astiva Health Holdings Incorporated | 17,944 | +2,830 | 1.8% |
| Molina Healthcare, Inc. | 14,748 | −13,852 | 1.5% |
| The Regents of the University of California | 11,621 | +4,614 | 1.2% |
| Altamed Health Services Corporation | 3,310 | +176 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 64,910 beneficiaries in Los Angeles County were assigned to 353 Medicare Shared Savings Program ACOs, 14.1% of assignable Original Medicare beneficiaries. Together, roughly 63% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.