Medicare Advantage plans in Marin County, CA: what changed for 2027
For 2027, Marin County in California has 9 Medicare Advantage plans that include drug coverage, compared with 10 in 2026, according to the CMS plan landscape files.
Companies no longer offering Advantage plans here in 2027
- Curana Health Holdings, LLC
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.
2 Advantage plan IDs (not counting Special Needs or Cost plans) listed here for 2026 are not in the 2027 file and 1 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, 29,558 of the 65,281 people eligible for Medicare in Marin County were enrolled in a Medicare Advantage or other Medicare health plan, 45.3%. A year earlier it was 29,720 of 64,096 (46.4%).
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 (9)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Alignment Health My Choice 050 (HMO) | Alignment Health Plan | HMO | $0 | $3,499 | 3.5 of 5 |
| Alignment Health Platinum + Instacart 016 (HMO-POS) | Alignment Health Plan | HMO-POS | $0 | $1,100 | 3.5 of 5 |
| Anthem Prime (HMO-POS) | Anthem Blue Cross Partnership Plan | HMO-POS | $0 | $1,200 | 3 of 5 |
| Humana Gold Plus H5619-147 (HMO) | Humana | HMO | $0 | $3,650 | 4 of 5 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | HMO | $0 | $295 | 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 Marin (HMO) | Kaiser Permanente | HMO | $27.00 | $6,000 | 4.5 of 5 |
| HumanaChoice H5525-087 (PPO) | Humana | PPO | $96.00 | $7,150 | 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 |
|---|---|---|---|---|---|
| Humana USAA Honor Giveback (PPO) | Humana | PPO | Not listed | $6,500 | 4 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 (12)
| Plan | Company | Type | Monthly premium | In-network out-of-pocket limit | Star rating |
|---|---|---|---|---|---|
| Alignment Health BreathEasy Plus 041 (HMO C-SNP) | Alignment Health Plan | HMO C-SNP · Chronic or Disabling Condition | $0 | $9,850 | 3.5 of 5 |
| Alignment Health Heart & Diabetes 010 (HMO C-SNP) | Alignment Health Plan | HMO C-SNP · Chronic or Disabling Condition | $0 | $1,900 | 3.5 of 5 |
| Alignment Health Heart & Diabetes 048 (HMO C-SNP) | Alignment Health Plan | HMO C-SNP · Chronic or Disabling Condition | $0 | $1,990 | 3.5 of 5 |
| 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 P25 (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 |
| Alignment Health Heart & Diabetes 051 (HMO C-SNP) | Alignment Health Plan | HMO C-SNP · Chronic or Disabling Condition | $0.10 | $9,850 | 3.5 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 |
| Alignment Health Clarity Plus 042 (HMO C-SNP) | Alignment Health Plan | HMO C-SNP · Chronic or Disabling Condition | $7.30 | $9,850 | 3.5 of 5 |
| Alignment Health Duals+ 030 (HMO D-SNP) | Alignment Health Plan | HMO D-SNP · Dual-Eligible | $7.30 | $9,850 | 3.5 of 5 |
| Alignment Health Heart & Diabetes Plus 039 (HMO C-SNP) | Alignment Health Plan | HMO C-SNP · Chronic or Disabling Condition | $7.30 | $9,850 | 3.5 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.