Medicare Advantage in Santa Cruz County, Arizona
8,114 people in Santa Cruz County, Arizona were enrolled in Medicare Advantage in October 2026, 65.7% of 12,355 eligible beneficiaries (+0.8 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 30% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,411 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 572 members here are in plans that terminate or leave the county. MA plans offered go from 20 to 17.
Parent organizations in Santa Cruz County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,384 | −378 | 29.7% |
| Centene Corporation | 2,244 | −133 | 28.0% |
| Alignment Healthcare USA, LLC | 2,027 | +1,274 | 25.3% |
| Banner Health | 655 | −467 | 8.2% |
| Humana Inc. | 507 | +136 | 6.3% |
| Devoted Health, Inc. | 103 | +53 | 1.3% |
| Elevance Health, Inc. | 62 | +13 | 0.8% |
| CVS Health Corporation | 44 | −171 | 0.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,266 beneficiaries in Santa Cruz County were assigned to 47 Medicare Shared Savings Program ACOs, 55.8% of assignable Original Medicare beneficiaries. Together, roughly 85% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.