Medicare Advantage in Ada County, ID, for 2027.
CMS lists 27 Medicare Advantage plans here for 2027, 5 fewer than 2026 (32). 59,447 people in the county had an individual Medicare Advantage plan in October 2026.
Sources: CMS CY2027 plan file (October 2026 release), CMS CY2026 plan file (September 2026 release), CMS enrollment by county (CPSC), October 2026, CMS 2027 Plan Crosswalk (October 1, 2026), CMS 2027 Star Ratings Data Tables (October 8, 2026). Member counts are floors because CMS hides counts of 10 or fewer.
The county in numbers
Plans that end here for 2027
9 plans with members in the county end or leave it, plus 113 with 10 or fewer members here. CMS moves 0 members to another plan, and 41,342 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| Saint Alphonsus Health Plan No Premium (HMO) | Trinity Health | 5,889 | Plan terminated |
| Saint Alphonsus Health Plan Cash Back (HMO) | Trinity Health | 4,669 | Plan terminated |
| PacificSource Medicare MyCare Choice Rx 24 (HMO-POS) | PacificSource | 1,652 | Plan terminated |
| HumanaChoice - Diabetes and Heart (PPO C-SNP) | Humana | 643 | Plan terminated |
| Humana Essentials Plus Giveback H5216-429 (PPO) | Humana | 447 | Plan terminated |
| Saint Alphonsus Health Plan Choice (PPO) | Trinity Health | 419 | Plan terminated |
| Molina Medicare Complete Care Select (HMO D-SNP) | Molina Healthcare | 407 | Plan terminated |
| Saint Alphonsus Health Plan Glory No RX (HMO) | Trinity Health | 290 | Plan terminated |
| PacificSource Medicare Explorer 6 (PPO) | PacificSource | 282 | Plan terminated |
Who holds the members
- UnitedHealth23,269
- Gemstone13,285
- Trinity Health11,267
- Humana5,336
- Molina Healthcare2,533
- PacificSource1,934
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- Humana Full Access (PPO)Humana4.5
- Humana Value Choice (PPO)Humana4.5
- HumanaChoice - Diabetes and Heart (PPO C-SNP)Humana4.5
- UHC Complete Care Support ID-1A (PPO C-SNP)UnitedHealth4.5
2027 overall Star Rating, 4.5 or more. Each plan's measure stars are in the county lookup.
See every plan, premium and copay in the free lookup.
Sort all 27 plans, open each plan's benefits and star measures, and see what each insurer paid agents in 2026.
Open Ada in the lookupWorking this county for AEP?
The AEP 2027 County Kit puts this county and your others in one file: the plans that end, where members land, what is still sold and a crosswalk sheet, with every number tied to its CMS file.
See the AEP 2027 County KitAll Idaho county pages. Facts from public CMS files, prepared by Health and Tech Now. Not plan advice. Check a plan's Summary of Benefits before you enroll.