Medicare Advantage in Santa Clara County, CA, for 2027.
CMS lists 36 Medicare Advantage plans here for 2027, 10 fewer than 2026 (46). 159,110 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
19 plans with members in the county end or leave it, plus 195 with 10 or fewer members here. CMS moves 6,854 members to another plan, and 113,527 stay in the same plan.
| Plan | Insurer | Members | Why |
|---|---|---|---|
| Anthem Prime (HMO-POS) | Elevance Health | 2,851 | Plan terminated |
| AARP Medicare Advantage from UHC CA-10 (HMO-POS) | UnitedHealth | 2,344 | Plan terminated |
| Central Health Classic Care Plan III (HMO) | Molina Healthcare | 1,011 | Plan terminated |
| Anthem Medicare Advantage (HMO-POS) | Elevance Health | 952 | Plan terminated |
| Aetna Medicare Enhanced (PPO) | CVS Health | 665 | Plan terminated |
| Central Health Embrace Care Plan (HMO C-SNP) | Molina Healthcare | 537 | Plan terminated |
| Aetna Medicare Eagle (PPO) | CVS Health | 346 | Plan terminated |
| CareAdvantage (HMO D-SNP) | Health Plan of San Mateo | 148 | Plan leaves this county |
| Central Health Embrace Choice Plan (HMO C-SNP) | Molina Healthcare | 120 | Plan terminated |
| Kaiser Permanente Senior Advantage Alam., SF, Napa (HMO) | Kaiser Foundation Health Plan | 52 | Plan leaves this county |
Where CMS moves members
| 2026 plan | 2027 plan | Members |
|---|---|---|
| Kaiser Permanente Dual Complete North P2 (HMO D-SNP) | Kaiser Permanente Dual Complete North P23 (HMO D-SNP) | 4,537 |
| Alignment Health Honor+ Plan (HMO) | Central Health Harmony 031 (HMO) | 1,228 |
| Alignment Health the ONE (HMO) | Central Health Harmony 031 (HMO) | 979 |
| SCAN MyChoice (HMO) | SCAN Classic (HMO) | 110 |
Who holds the members
- Kaiser Foundation Health Plan87,744
- Alignment Healthcare USA23,432
- SANTA CLARA COUNTY HEALTH AUTHORITY11,748
- Elevance Health11,471
- SCAN Group8,403
- UnitedHealth6,580
Individual Medicare Advantage members by parent company, October 2026.
Top rated plans sold here
- Kaiser Permanente Dual Complete North P23 (HMO D-SNP)Kaiser Foundation Health Plan4.5
- Kaiser Permanente Sr Adv Basic Santa Clara (HMO)Kaiser Foundation Health Plan4.5
- Kaiser Permanente Sr Adv Enhanced Santa Clara (HMO)Kaiser Foundation Health Plan4.5
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 36 plans, open each plan's benefits and star measures, and see what each insurer paid agents in 2026.
Open Santa Clara 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 California 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.