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Medicare Advantage Plans in Contra Costa County, CA
Looking for Medicare Advantage plans in Contra Costa County? Enter your ZIP Code below to compare affordable monthly premium plans in your area.
Contra Costa County, CA, is home to 6 Medicare Advantage (Medicare Part C) plans in 2026.
Learn more about Medicare Advantage in California or call to speak with a licensed insurance agent who can help you compare Contra Costa County Medicare Advantage plans and – if you're eligible – help you enroll.
We offer plans from Humana, UnitedHealthcare®, Anthem Blue Cross and Blue Shield*, Aetna, HealthspringSM, Wellcare, or Kaiser Permanente.
Enrollment may be limited to certain times of the year. See why you may be able to enroll today.
Medicare beneficiaries in Concord, Richmond, Antioch and all across Contra Costa County have access to Medicare Advantage plans that can come in several different forms. The two most popular types are HMO and PPO plans.
With an HMO (Health Maintenance Organization) plan, you choose from a network of participating doctors and other health care providers around the Contra Costa area for your care. Care is typically not covered by the plan when received outside of the network, except in the case of emergencies and certain health procedures.
PPO (Preferred Provider Organization) plans offer some more flexibility when choosing a doctor. PPO plans in Contra Costa – and all across the country for that matter – allow for some coverage outside of the plan’s intended network, though you may pay higher out-of-pocket costs for care outside your plan network.
Learn more and review the list of 2026 Contra Costa Medicare Advantage plans below.
2026 Medicare Advantage plans in Contra Costa County
| 2026 Medicare Advantage Plans in Contra Costa | |
|---|---|
| Number of unique plans | 6 |
| Average monthly premium | $43.32 |
| Average (in-network) out-of-pocket maximum | $5,050.00 |
| Average Medicare Star Rating* | 4.08 |
While the number of unique plans in any county can change slightly every year, the table above presents a good idea of what you can expect to see in 2026.
The average monthly premium for Medicare Advantage plans in Contra Costa is $43.32 per month in 2026, though there may be plans available where you live that feature different premiums.
Medicare Advantage plans in Contra Costa County have an average Medicare Star Rating of 4.08 in 2026.* Plans rated four stars or higher are considered top-rated Medicare plans.
Premiums, deductibles and other costs may vary. The numbers reported in the table above are taken from the Centers for Medicare & Medicaid Services (CMS). A licensed insurance agent will be able to help you review and compare costs for specific plans available in California or wherever you may live.
* Every year, the Centers for Medicare & Medicaid Services (CMS) evaluates plans based on a 5-star rating system.
List of Medicare Advantage plans in Contra Costa County
The following table includes cost information and other plan details for Medicare Advantage plans available in Contra Costa County in 2026.
| Plan Name | Plan Code | Monthly Premium | Deductible | Out of Pocket Max | Prescription Drug Coverage | Medicare Star Rating |
|---|---|---|---|---|---|---|
| AARP Medicare Advantage from UHC CA-8 (HMO-POS) | H0543-189-000 | $74.00 | $440.00 | $5,900.00 | Yes | 4 out of 5 stars |
| HumanaChoice H5525-084 (PPO) | H5525-084-000 | $70.00 | $615.00 | $6,750.00 | Yes | 3.5 out of 5 stars |
| Kaiser Permanente Dual Complete North P17 (HMO D-SNP) | H8794-017-000 | $0.00 | $615.00 | $0.00 | Yes | 4 out of 5 stars |
| Kaiser Permanente Sr Adv Basic Contra Costa (HMO) | H0524-061-000 | $18.00 | $0.00 | $5,000.00 | Yes | 4.5 out of 5 stars |
| Kaiser Permanente Sr Adv Enhanced Contra Costa (HMO) | H0524-033-000 | $89.00 | $0.00 | $3,400.00 | Yes | 4.5 out of 5 stars |
| UHC Complete Care Support CA-8AP (HMO-POS C-SNP) | H0543-249-000 | $8.90 | $615.00 | $9,250.00 | Yes | 4 out of 5 stars |
List of Medicare Prescription Drug Plans in Contra Costa County
The following table includes cost information and other plan details for Medicare Prescription Drug Plans available in Contra Costa County in 2026.
| Plan Name | Plan Code | Monthly Premium | Deductible | Preferred Pharmacies | Accepts Mail Order | Medicare Star Rating |
|---|---|---|---|---|---|---|
| AARP Medicare Rx Preferred from UHC (PDP) | S5921-413-000 | $165.40 | $130.00 | Yes | Yes | 2 out of 5 stars |
| AARP Medicare Rx Saver from UHC (PDP) | S5921-376-000 | $109.40 | $615.00 | Yes | Yes | 2 out of 5 stars |
| HealthSpring Assurance Rx (PDP) | S5617-158-000 | $0.00 | $615.00 | Yes | Yes | 2.5 out of 5 stars |
| HealthSpring Extra Rx (PDP) | S5617-382-000 | $70.60 | $615.00 | Yes | Yes | 2.5 out of 5 stars |
| Humana Basic Rx Plan (PDP) | S5884-114-000 | $132.20 | $615.00 | Yes | Yes | Plan too new to be measured |
| Humana Premier Rx Plan (PDP) | S5884-178-000 | $172.90 | $0.00 | Yes | Yes | Plan too new to be measured |
The 2026 Medicare open enrollment period lasts from October 15 until December 7. Depending on your circumstances, fall 2026 Medicare open enrollment may the only time of year you can make changes to your 2026 Medicare coverage.
Call to speak with a licensed insurance agent to find out if you're eligible to enroll in 2026 Medicare Advantage plans in Contra Costa County.