Best Medicare Advantage Plans in San Mateo County, CA for 2027
Every general-audience Medicare Advantage plan with drug coverage sold in San Mateo County, ranked by what it could cost you in a bad year: 12 months of premiums, less any Part B giveback, plus the in-network out-of-pocket maximum.
San Mateo County plans, ranked
| # | Plan | Premium / month | In-network max out-of-pocket | Worst-case year | Stars |
|---|---|---|---|---|---|
| 1 | Imperial Dynamic Plan (HMO)Imperial Health Plan of California, Inc. · HMO51 of 55 counties · drug deductible $0Part B giveback $15/mo · Dental up to $4,500/yr · eyewear $500/yr · hearing aids $500/yr · OTC items $480/yr | $0−$15 Part B giveback | $295 | $115 | 4★ |
| 2 | Anthem Prime (HMO-POS)Anthem Blue Cross Partnership Plan · HMO-POS4 of 55 counties · drug deductible $395Preventive dental · eyewear $75/yr · OTC items $60/yr | $0 | $1,200 | $1,200 | 3★ |
| 3 | SCAN Classic (HMO)SCAN Health Plan · HMO2 of 55 counties · drug deductible $450Dental up to $1,000/yr · eyewear $200/yr · OTC items $200/yr | $0 | $2,000 | $2,000 | 4★ |
| 4 | SCAN Costco Medicare Advantage (HMO)SCAN Health Plan · HMO2 of 55 counties · drug deductible $450Dental up to $1,000/yr · OTC items $460/yr | $0 | $2,000 | $2,000 | 4★ |
| 5 | SCAN Allied (HMO)SCAN Health Plan · HMO2 of 55 counties · drug deductible $75Dental up to $1,000/yr · eyewear $175/yr · OTC items $360/yr | $0 | $2,900 | $2,900 | 4★ |
| 6 | Central Health Harmony 031 (HMO)Alignment Health Plan · HMO4 of 55 counties · drug deductible $0Dental · eyewear $150/yr · OTC items $300/yr | $0 | $3,400 | $3,400 | 3.5★ |
| 7 | CCHP Senior Program (HMO)CCHP (Chinese Community Health Plan) · HMO2 of 55 counties · drug deductible $0Dental · eyewear $75/yr | $38 | $3,000 | $3,456 | 3★ |
| 8 | CCHP Senior Value Program (HMO)CCHP (Chinese Community Health Plan) · HMO2 of 55 counties · drug deductible $0Dental · eyewear $50/yr | $0 | $3,500 | $3,500 | 3★ |
| 9 | Aetna Medicare Signature Extra (HMO)Aetna Medicare · HMO3 of 55 counties · drug deductible $400Dental up to $500/yr · eyewear $100/yr · hearing aids $500/yr per ear | $0 | $3,600 | $3,600 | 3★ |
| 10 | Blue Shield Inspire (HMO)Blue Shield of California · HMO2 of 55 counties · drug deductible $475Preventive dental · eyewear $170/yr · OTC items $120/yr | $60 | $4,300 | $5,020 | 4★ |
| 11 | Kaiser Permanente Sr Adv Enhanced Marin San Mateo (HMO)Kaiser Permanente · HMO2 of 55 counties · drug deductible $0Dental | $97 | $3,900 | $5,064 | 4.5★ |
| 12 | Sutter Senior Advantage, a SCAN Medicare Plan (HMO)SCAN Health Plan · HMO2 of 55 counties · drug deductible $0Dental · eyewear $100/yr · OTC items $100/yr | $49 | $4,900 | $5,488 | 4★ |
| 13 | Alignment Health Sutter Advantage +More (HMO)Alignment Health Plan · HMO3 of 55 counties · drug deductible $0Dental · eyewear $50/yr · OTC items $180/yr | $50 | $4,900 | $5,500 | 3.5★ |
| 14 | Anthem Medicare Advantage (HMO-POS)Anthem Blue Cross · HMO-POS1 of 55 counties · drug deductible $0Preventive dental | $0 | $5,600 | $5,600 | 3.5★ |
| 15 | Kaiser Permanente Senior Advantage Basic San Mateo (HMO)Kaiser Permanente · HMO1 of 55 counties · drug deductible $0Dental | $28 | $6,000 | $6,336 | 4.5★ |
| 16 | Alignment Health Honor Plus 060 (HMO)Alignment Health Plan · HMO23 of 55 counties · drug deductible $700Dental up to $2,000/yr · eyewear $250/yr · OTC items $1,164/yr | $7.30 | $9,850 | $9,938 | 3.5★ |
Worst-case year = 12 × (monthly plan premium − any Part B giveback) + in-network maximum out-of-pocket. The giveback is money back on the Part B premium ($202.90 a month in 2026), which is otherwise the same for everyone, so a large one can push the worst-case year below $0; drug costs are capped separately at $2,400 in 2027. Other extras are the yearly maximums each plan filed with CMS and don’t change the order. Methodology
What changed since 2026
- Plans with drug coverage: 22 in 2026, 18 in 2027.
- $0-premium plans: 15 in 2026, 11 in 2027.
- Median in-network out-of-pocket maximum: $3,550 in 2026, $3,550 in 2027.
- 38,324 people here were in a general-audience Advantage plan in October 2026; 1,909 of them are in a plan that ends or leaves the county for 2027 and must choose again.
From our 2026 vs. 2027 Medicare Advantage study (CMS landscape, enrollment and crosswalk files).
Before you enroll, check that your doctors are in the plan’s network and how it covers your drugs in the Medicare Plan Finder. Weighing Advantage against Original Medicare with a Medigap plan? Run the county calculator.
Also sold here without drug coverage: Imperial Courage Plan (HMO), Aetna Medicare Eagle (HMO).
Questions
How many Medicare Advantage plans are in San Mateo County for 2027?
16 general-audience plans with drug coverage, 9 of them with a $0 monthly premium, compared with 22 plans and 15 $0-premium plans in 2026. Special Needs Plans aren't counted.
Which plan has the lowest worst-case cost in San Mateo County?
Imperial Dynamic Plan (HMO) from Imperial Health Plan of California, Inc.: $0 a month with an in-network out-of-pocket maximum of $295, so at most about $115 for the year in premiums and in-network costs.
Do any San Mateo County plans have a Part B giveback?
1 do. The largest is $15 a month off your Part B premium, from Imperial Dynamic Plan (HMO).
How many San Mateo County plans have 4 or more stars?
8 of 16, based on CMS's 2027 ratings of the contract behind each plan.
Sources
- CMS, CY 2027 Medicare Advantage and Prescription Drug Plan Landscape (CY2027_Landscape_202609.csv), from cms.gov; extra benefits (Part B giveback, dental, eyewear, hearing aids, over-the-counter allowance) from the CMS CY 2027 Plan Benefit Package files, cms.gov, yearly amounts as each plan filed them; star ratings from the CMS 2027 Star Ratings Data Tables (October 8, 2026), cms.gov. Ratings are per contract, so plans under the same contract share one rating. General-audience plans only: Special Needs Plans, Cost plans and employer group plans are not ranked.
- County population: 2020 Census, via the USDA Rural-Urban Continuum Codes (2023).
Educational information, not a recommendation to join any plan. We are not an insurance agent or broker, and we are not connected with or endorsed by the U.S. government or the federal Medicare program. · Advertiser disclosure
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