Medicare Advantage plans in San Mateo County, CA: what changed for 2027
For 2027, San Mateo County in California has 16 Medicare Advantage plans that include drug coverage, compared with 19 in 2026, according to the CMS plan landscape files.
Companies no longer offering Advantage plans here in 2027
- Curana Health Holdings, LLC
- Molina Healthcare, Inc.
If you are in one of their plans, you should have received a notice. You can choose a new plan during Open Enrollment, and special enrollment rules can apply when a plan leaves your area.
8 Advantage plan IDs (not counting Special Needs or Cost plans) listed here for 2026 are not in the 2027 file and 4 plan IDs are new. Some of these are the same plan renamed or merged, so check the Annual Notice of Change from your plan.
How many people here are in Medicare Advantage
In October 2026, 73,795 of the 145,668 people eligible for Medicare in San Mateo County were enrolled in a Medicare Advantage or other Medicare health plan, 50.7%. A year earlier it was 71,820 of 142,168 (50.5%).
CMS counts enrollees in all Medicare health plans, including Advantage, cost and PACE plans, by the county where they live.
Before you choose a plan
Compare plans for your ZIP code, drugs and doctors on the official Medicare Plan Finder, or call 1-800-MEDICARE (1-800-633-4227). Free, unbiased counselling is available from your State Health Insurance Assistance Program at shiphelp.org.
Advantage plans with drug coverage for 2027 (16)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Aetna Medicare Signature Extra (HMO) | Aetna Medicare | HMO | $0 | $3,600 | 3 of 5 |
| Anthem Medicare Advantage (HMO-POS) | Anthem Blue Cross | HMO-POS | $0 | $5,600 | 3.5 of 5 |
| Anthem Prime (HMO-POS) | Anthem Blue Cross Partnership Plan | HMO-POS | $0 | $1,200 | 3 of 5 |
| CCHP Senior Value Program (HMO) | CCHP (Chinese Community Health Plan) | HMO | $0 | $3,500 | 3 of 5 |
| Central Health Harmony 031 (HMO) | Alignment Health Plan | HMO | $0 | $3,400 | 3.5 of 5 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | HMO | $0 | $295 | 4 of 5 |
| SCAN Allied (HMO) | SCAN Health Plan | HMO | $0 | $2,900 | 4 of 5 |
| SCAN Classic (HMO) | SCAN Health Plan | HMO | $0 | $2,000 | 4 of 5 |
| SCAN Costco Medicare Advantage (HMO) | SCAN Health Plan | HMO | $0 | $2,000 | 4 of 5 |
| Alignment Health Honor Plus 060 (HMO) | Alignment Health Plan | HMO | $7.30 | $9,850 | 3.5 of 5 |
| Kaiser Permanente Senior Advantage Basic San Mateo (HMO) | Kaiser Permanente | HMO | $28.00 | $6,000 | 4.5 of 5 |
| CCHP Senior Program (HMO) | CCHP (Chinese Community Health Plan) | HMO | $38.00 | $3,000 | 3 of 5 |
| Sutter Senior Advantage, a SCAN Medicare Plan (HMO) | SCAN Health Plan | HMO | $49.00 | $4,900 | 4 of 5 |
| Alignment Health Sutter Advantage +More (HMO) | Alignment Health Plan | HMO | $50.00 | $4,900 | 3.5 of 5 |
| Blue Shield Inspire (HMO) | Blue Shield of California | HMO | $60.00 | $4,300 | 4 of 5 |
| Kaiser Permanente Sr Adv Enhanced Marin San Mateo (HMO) | Kaiser Permanente | HMO | $97.00 | $3,900 | 4.5 of 5 |
Advantage plans without drug coverage for 2027 (2)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Aetna Medicare Eagle (HMO) | Aetna Medicare | HMO | Not listed | $4,450 | 3 of 5 |
| Imperial Courage Plan (HMO) | Imperial Health Plan of California, Inc. | HMO | Not listed | $2,999 | 4 of 5 |
Special Needs Plans for 2027 (8)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Imperial Senior Value (HMO C-SNP) | Imperial Health Plan of California, Inc. | HMO C-SNP · Chronic or Disabling Condition | $0 | $295 | 4 of 5 |
| Kaiser Permanente Dual Complete North P22 (HMO D-SNP) | Kaiser Permanente | HMO D-SNP · Dual-Eligible | $0 | $9,850 | 4.5 of 5 |
| Premier Care (HMO I-SNP) | Align Senior Care | HMO I-SNP · Institutional | $0 | $1,900 | Not Enough Data Available |
| SCAN Balance (HMO C-SNP) | SCAN Health Plan | HMO C-SNP · Chronic or Disabling Condition | $0 | $1,900 | 4 of 5 |
| SCAN Strive (HMO C-SNP) | SCAN Health Plan | HMO C-SNP · Chronic or Disabling Condition | $0 | $9,850 | 4 of 5 |
| Imperial Flex (HMO C-SNP) | Imperial Health Plan of California, Inc. | HMO C-SNP · Chronic or Disabling Condition | $2.70 | $9,850 | 4 of 5 |
| CareAdvantage (HMO D-SNP) | HEALTH PLAN OF SAN MATEO | HMO D-SNP · Dual-Eligible | $7.30 | $9,850 | 3 of 5 |
| Senior Care (HMO I-SNP) | Align Senior Care | HMO I-SNP · Institutional | $7.30 | $9,850 | Not Enough Data Available |
Stand-alone Part D drug plans are offered statewide: see California drug plans.
Sources
- Centers for Medicare & Medicaid Services, CY2027 Medicare Advantage and Part D Landscape file (data last updated 18 October 2026)
- Centers for Medicare & Medicaid Services, CY2026 Medicare Advantage and Part D Landscape file (September 2026 release)
- Centers for Medicare & Medicaid Services, MA State/County Penetration files, October 2026 and October 2025
Checked 29 October 2026. Plans and premiums can change before 1 January 2027. Confirm any plan on Medicare.gov before you enrol.