Medicare plans
Contra Costa County, CA
10 Medicare Advantage plans and 10 drug-only plans are offered in Contra Costa County, CA for 2027. 5 of the Advantage plans have a $0 monthly premium.
License: a US government work, in the public domain (Public Domain Mark 1.0).
Data only, not plan advice. Confirm on Medicare.gov Plan Finder or 1-800-MEDICARE.
Shopping for your own coverage? Use Medicare Plan Finder at medicare.gov or call 1-800-MEDICARE.
Plans by type
| Type | Plans |
|---|---|
| Advantage without drug coverage | 1 |
| Advantage with drugs | 9 |
| Drug only | 10 |
| All plans | 20 |
5 of these are Special Needs Plans (SNPs), open only to people who qualify: 2 D-SNP for people with both Medicare and Medicaid and 3 C-SNP for people with certain chronic conditions. The 10 drug-only plans are listed for all of California.
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
For agents and agencies
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Premiums and out-of-pocket limits
| Measure | 2027 |
|---|---|
| Advantage monthly premium | $0 to $98 |
| Advantage plans at $0 | 5 |
| Advantage out-of-pocket maximum (in network) | $295 to $9,850 |
| Drug-only monthly premium | $5.30 to $252.60 |
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Star Ratings
| Overall rating | Advantage plans |
|---|---|
| 3 stars | 1 |
| 4 stars | 5 |
| 4.5 stars | 3 |
| Too new to rate | 1 |
8 Advantage plans in Contra Costa County, CA have an overall rating of 4 stars or more.
Source: CMS 2027 Medicare Part C and D Star Ratings, as of October 8, 2026. Publisher page
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Change from 2026
Contra Costa County, CA has 10 Advantage plans in 2027, 1 fewer than 2026 (11). 1 plan is new to the county and 2 plans offered here in 2026 are gone. $0 plans stay at 5.
| Advantage plans | 2026 | 2027 |
|---|---|---|
| Offered in the county | 11 | 10 |
| At a $0 premium | 5 | 5 |
| New for 2027 | 1 | |
| Offered in 2026, gone in 2027 | 2 |
Offered here in 2026, not in 2027
- AARP Medicare Advantage from UHC CA-8 (HMO-POS) (H0543-189, UnitedHealth Group, Inc.)
- Central Health Dual Access Plan (HMO D-SNP) (H5649-024, Molina Healthcare, Inc.)
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Source: CMS CY2026 Medicare Advantage and Part D landscape file, as of September 25, 2025. Publisher page
Plans by parent organization
| Parent organization | Advantage | Drug only | Total |
|---|---|---|---|
| California Physicians' Service | 0 | 2 | 2 |
| Centene Corporation | 0 | 2 | 2 |
| Contra Costa Health Services | 1 | 0 | 1 |
| Health Care Service Corporation | 0 | 1 | 1 |
| Humana Inc. | 1 | 3 | 4 |
| Imperial Health Plan of California | 4 | 0 | 4 |
| Kaiser Foundation Health Plan, Inc. | 3 | 0 | 3 |
| UnitedHealth Group, Inc. | 1 | 2 | 3 |
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Every 2027 plan in Contra Costa County, CA
20 plans, by plan name. Select a column to sort. Plan types: HMO (health maintenance organization) means you generally must use the plan's network of doctors and hospitals, except in an emergency; HMO-POS is an HMO with a point-of-service option that may cover some care outside the network, usually at a higher cost; and PPO (preferred provider organization) means you can see doctors outside the network, usually at a higher cost.
| Plan ↑ | Type | Premium | Out-of-pocket max | Drug deductible | Stars |
|---|---|---|---|---|---|
| AARP Medicare Rx Preferred from UHC (PDP)S5921-413-000 · UnitedHealth Group, Inc. | Drug onlyPDP | $242.60 | n/a | $300 | 3 |
| AARP Medicare Rx Saver from UHC (PDP)S5921-376-000 · UnitedHealth Group, Inc. | Drug onlyPDP | $170.80 | n/a | $700 | 3 |
| Blue Shield Rx Enhanced (PDP)S2468-004-000 · California Physicians' Service | Drug onlyPDP | $252.60 | n/a | $200 | 2.5 |
| Blue Shield Rx Plus (PDP)S2468-003-000 · California Physicians' Service | Drug onlyPDP | $210 | n/a | $700 | 2.5 |
| Contra Costa Health Care Plus (HMO D-SNP)H5119-001-000 · Contra Costa Health Services | Advantage with drugsHMO D-SNP | $7.30 | $9,850 | $700 | Too new to rate |
| HealthSpring Assurance Rx (PDP)S5715-049-000 · Health Care Service Corporation | Drug onlyPDP | $9.30 | n/a | $700 | 2.5 |
| Humana Basic Rx Plan (PDP)S5884-114-000 · Humana Inc. | Drug onlyPDP | $118.30 | n/a | $700 | 4.5 |
| Humana Premier Rx Plan (PDP)S5884-178-000 · Humana Inc. | Drug onlyPDP | $191.20 | n/a | $350 | 4.5 |
| Humana Value Rx Plan (PDP)S5884-211-000 · Humana Inc. | Drug onlyPDP | $130.30 | n/a | $687 | 4.5 |
| HumanaChoice H5525-084 (PPO)H5525-084-000 · Humana Inc. | Advantage with drugsPPO | $93 | $6,750 | $700 | 4 |
| Imperial Courage Plan (HMO)H5496-016-000 · Imperial Health Plan of California | Advantage without drug coverageHMO | $0 | $2,999 | n/a | 4 |
| Imperial Dynamic Plan (HMO)H5496-012-000 · Imperial Health Plan of California | Advantage with drugsHMO | $0 | $295 | $0 | 4 |
| Imperial Flex (HMO C-SNP)H5496-017-000 · Imperial Health Plan of California | Advantage with drugsHMO C-SNP | $2.70 | $9,850 | $450 | 4 |
| Imperial Senior Value (HMO C-SNP)H5496-005-000 · Imperial Health Plan of California | Advantage with drugsHMO C-SNP | $0 | $295 | $0 | 4 |
| Kaiser Permanente Dual Complete North P17 (HMO D-SNP)H8794-017-000 · Kaiser Foundation Health Plan, Inc. | Advantage with drugsHMO D-SNP | $0 | $9,850 | $700 | 4.5 |
| Kaiser Permanente Sr Adv Basic Contra Costa (HMO)H0524-061-000 · Kaiser Foundation Health Plan, Inc. | Advantage with drugsHMO | $29 | $6,000 | $0 | 4.5 |
| Kaiser Permanente Sr Adv Enhanced Contra Costa (HMO)H0524-033-000 · Kaiser Foundation Health Plan, Inc. | Advantage with drugsHMO | $98 | $3,900 | $0 | 4.5 |
| UHC Complete Care Support CA-8AP (HMO-POS C-SNP)H0543-249-000 · UnitedHealth Group, Inc. | Advantage with drugsHMO-POS C-SNP | $0 | $9,850 | $100 | 3 |
| Wellcare Classic (PDP)S4802-094-000 · Centene Corporation | Drug onlyPDP | $7.30 | n/a | $700 | 3 |
| Wellcare Value Script (PDP)S4802-163-000 · Centene Corporation | Drug onlyPDP | $5.30 | n/a | $700 | 3 |
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Source: CMS 2027 Medicare Part C and D Star Ratings, as of October 8, 2026. Publisher page
For pharmacies
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Neighboring counties
- Alameda County32 Advantage plans, 19 at $0
- Marin County23 Advantage plans, 13 at $0
- Sacramento County32 Advantage plans, 21 at $0
- San Francisco County46 Advantage plans, 27 at $0
- San Joaquin County39 Advantage plans, 22 at $0
- Solano County10 Advantage plans, 6 at $0
- Sonoma County13 Advantage plans, 6 at $0
Health data for Contra Costa County, CA
About this data
Plans, premiums, out-of-pocket maximums, and drug deductibles come from the CMS CY2027 Medicare Advantage and Part D landscape file. Change from 2026 compares it with the CY2026 landscape. Stars are the 2027 Star Ratings CMS released October 8, 2026: the overall rating for Advantage plans and the Part D summary rating for drug-only plans, which have no overall rating.
Advantage counts include Special Needs Plans (SNPs), which are open only to people who qualify: D-SNPs for people with both Medicare and Medicaid, C-SNPs for people with certain chronic conditions, and I-SNPs for people who live in a nursing home or need that level of care at home. Drug-only plans are listed by CMS for a whole state, so every county page shows them. Employer group plans are not in the file. This page lists plans; it does not say which plan fits anyone, and Rivvi does not sell plans.
Source: CMS Medicare Advantage and Part D landscape files, as of September 30, 2026. Publisher page
Source: CMS CY2026 Medicare Advantage and Part D landscape file, as of September 25, 2025. Publisher page
Source: CMS 2027 Medicare Part C and D Star Ratings, as of October 8, 2026. Publisher page