Medicare Advantage in Rio Arriba County, New Mexico
5,083 people in Rio Arriba County, New Mexico were enrolled in Medicare Advantage in October 2026, 50.2% of 10,132 eligible beneficiaries (+0.8 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 32% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,485 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 1,288 members here are in plans that terminate or leave the county, and CHRISTUS Health, Molina Healthcare, Inc. leave. MA plans offered go from 24 to 14.
Parent organizations in Rio Arriba County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,626 | +217 | 32.2% |
| Humana Inc. | 1,310 | +4 | 26.0% |
| Presbyterian Healthcare Services | 1,069 | −171 | 21.2% |
| Health Care Service Corporation | 904 | +36 | 17.9% |
| CHRISTUS Health | 54 | −1 | 1.1% |
| Devoted Health, Inc. | 43 | new | 0.9% |
| CVS Health Corporation | 25 | +4 | 0.5% |
| Molina Healthcare, Inc. | 14 | new | 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, 575 beneficiaries in Rio Arriba County were assigned to 21 Medicare Shared Savings Program ACOs, 17.4% 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.