Plan year 2027 · San Mateo County, CA
Medicare Advantage plans leaving San Mateo County, California in 2027
4 carriers are pulling plans from San Mateo County for 2027: Central Health, Alignment Health Plan, Aetna and 1 more.
Step 1 · Check your plan
Is your plan leaving San Mateo County?
Tap your plan to see its 2027 status in San Mateo County, or type its name.
Is your plan one of these?
Showing the 8 largest of 9 changing plans. Don't see yours? Type it below.
4 carriers are changing coverage in San Mateo County for 2027: 8 plan terminations and 1 service area reduction. Roughly 2,212 members in San Mateo County are affected. 31 Medicare Advantage plans were offered here in 2026; 24 are offered for 2027. If you're enrolled in one of the plans below, you'll need to pick a new plan for January 1, 2027.
Carriers with changes in San Mateo County
- Central Health5 terminations1,027 membersCentral Health Valor Care Plan (HMO) · Central Health Embrace Choice Plan (HMO C-SNP) · Central Health Embrace Care Plan (HMO C-SNP) …
- Alignment Health Plan1 termination1,010 membersAlignment Health My Choice (PPO)
- Aetna2 terminations175 membersAetna Medicare Enhanced (PPO) · Aetna Medicare Eagle (PPO)
- Align Senior Care1 service area reductionAdvantage Care (HMO)
Every affected plan in San Mateo County
Sorted by carrier. Effective dates are for the 2027 plan year.
| Carrier | Plan | What's changing | Effective | What members must do |
|---|---|---|---|---|
| Aetna Medicare | Aetna Medicare Eagle (PPO) H5521-369 · PPO | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Aetna Medicare | Aetna Medicare Enhanced (PPO) H5521-676 · PPO | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Align Senior Care | Advantage Care (HMO) H3274-005 · HMO | Service Area Reduction | January 1, 2027 | Confirm whether your county is still covered. |
| Alignment Health Plan | Alignment Health My Choice (PPO) H4961-003 · PPO | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Central Health Medicare Plan | Central Health Classic Care Plan IV (HMO) H5649-018 · HMO | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Central Health Medicare Plan | Central Health Dual Access Plan (HMO D-SNP) H5649-024 · HMO D-SNP | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Central Health Medicare Plan | Central Health Embrace Care Plan (HMO C-SNP) H5649-025 · HMO C-SNP | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Central Health Medicare Plan | Central Health Embrace Choice Plan (HMO C-SNP) H5649-026 · HMO C-SNP | Termination | January 1, 2027 | Choose a new plan before the deadline. |
| Central Health Medicare Plan | Central Health Valor Care Plan (HMO) H5649-030 · HMO | Termination | January 1, 2027 | Choose a new plan before the deadline. |
Plans available in San Mateo County for 2027
Losing a plan does not mean losing options. 24 Medicare Advantage plans from 10 carriers are offered in San Mateo County, California for 2027. 15 have a $0 monthly premium, and 2 are D-SNP plans for people with both Medicare and Medicaid.
| Plan | Type | Monthly premium |
|---|---|---|
| Aetna Medicare Eagle (HMO)Aetna Medicare$0/moHMO | HMO | $0 |
| Aetna Medicare Signature Extra (HMO)Aetna Medicare$0/moHMO | HMO | $0 |
| Anthem Medicare Advantage (HMO-POS)Anthem Blue Cross$0/moHMO-POS | HMO-POS | $0 |
| Anthem Prime (HMO-POS)Anthem Blue Cross Partnership Plan$0/moHMO-POS | HMO-POS | $0 |
| CCHP Senior Value Program (HMO)CCHP (Chinese Community Health Plan)$0/moHMO | HMO | $0 |
Showing the 5 lowest-premium of 24 available plans. 2027 star ratings are published by CMS in early October 2026. Premiums shown are the consolidated Part C + D monthly premium.
Dates that matter
Your ANOC letter arrives
Carriers must mail the Annual Notice of Change — and non-renewal notices — before enrollment opens.
Annual Enrollment Period
Pick your 2027 plan. Coverage you choose starts January 1, 2027.
How it works →Special Enrollment Period
Members of terminated plans get extra time to choose a new Medicare Advantage or Part D plan.
How it works →Guaranteed-issue Medigap window
Losing your plan gives you the right to buy select Medigap policies with no health questions.
Medicare Advantage Open Enrollment
Already in a Medicare Advantage plan on January 1? You can make one change: switch plans or go back to Original Medicare.
How it works →
Step 2 · Tell us where to send your options
Your 2027 options in San Mateo County
Step 3 · Choose your path
You're all set.
Both options are free. Either way, your information stays with our office.
Where else these carriers are leaving in California
Central Health
Alignment Health Plan
ZIP codes in San Mateo County
These changes apply to Medicare Advantage members living in San Mateo County, including these ZIP codes:
94002, 94005, 94010, 94014, 94015, 94018, 94019, 94020, 94021, 94025, 94027, 94028, 94030, 94037, 94038, 94044, 94060, 94061, 94062, 94063, 94065, 94066, 94070, 94074, 94080, 94128, 94401, 94402, 94403, 94404