Medicare Advantage in Hillsborough County, Florida
172,547 people in Hillsborough County, Florida were enrolled in Medicare Advantage in October 2026, 62.8% of 274,972 eligible beneficiaries (+0.05 pts since October 2025). Humana Inc. is the largest parent organization with 42% of reported enrollment; 23 parent organizations have 11 or more members and the HHI is 2,667 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 33,184 members here are in plans that terminate or leave the county. MA plans offered go from 58 to 52.
Parent organizations in Hillsborough County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 72,867 | +9,435 | 42.3% |
| UnitedHealth Group, Inc. | 41,896 | −1,949 | 24.3% |
| Elevance Health, Inc. | 23,647 | +1,536 | 13.7% |
| CVS Health Corporation | 14,263 | −6,363 | 8.3% |
| Devoted Health, Inc. | 7,149 | +3,475 | 4.2% |
| Centene Corporation | 3,311 | −715 | 1.9% |
| BayCare Health System, Inc. | 3,244 | +884 | 1.9% |
| Guidewell Mutual Holding Corporation | 3,175 | −1,937 | 1.8% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 592 | −62 | 0.3% |
| Ultimate Healthcare Holdings, LLC | 484 | +299 | 0.3% |
| Athena Healthcare Holdings, LLC | 449 | +277 | 0.3% |
| Health Care Service Corporation | 358 | −918 | 0.2% |
| Gold Kidney Health Plan | 194 | +155 | 0.1% |
| Chapters CareNu Inc | 139 | −33 | under 0.1% |
| Total Community Options, Inc. | 128 | +61 | 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, 33,128 beneficiaries in Hillsborough County were assigned to 329 Medicare Shared Savings Program ACOs, 47.3% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.