Medicare Advantage in Lake County, Indiana
49,470 people in Lake County, Indiana were enrolled in Medicare Advantage in October 2026, 46.5% of 106,472 eligible beneficiaries (+0.1 pts since October 2025). Elevance Health, Inc. is the largest parent organization with 34% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 2,253 (highly concentrated). For 2027, 58 members here are in plans that terminate or leave the county. MA plans offered go from 43 to 40.
Parent organizations in Lake County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Elevance Health, Inc. | 16,830 | −690 | 34.2% |
| UnitedHealth Group, Inc. | 10,270 | −1,521 | 20.9% |
| Humana Inc. | 10,259 | +753 | 20.8% |
| CVS Health Corporation | 6,635 | +185 | 13.5% |
| Devoted Health, Inc. | 2,399 | +2,107 | 4.9% |
| Zing Health Consolidator, Inc | 1,414 | +381 | 2.9% |
| Health Care Service Corporation | 489 | +3 | 1.0% |
| Centene Corporation | 415 | +97 | 0.8% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 296 | −24 | 0.6% |
| Franciscan Alliance, Inc. | 131 | +9 | 0.3% |
| Highmark Health | 56 | new | 0.1% |
| SNP Holdings, LLC | 32 | +12 | under 0.1% |
| Union Health Services, Inc. | 13 | +2 | under 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, 24,181 beneficiaries in Lake County were assigned to 108 Medicare Shared Savings Program ACOs, 57.9% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.