Contra Costa County Health Insurance
What you can buy in Contra Costa County – the carriers, the local plans nobody else has, and the hospital systems your network needs to include. Verified against Covered California’s published 2026 plan-year carrier list.
Carriers selling in Contra Costa County (2026 plan year)
Contra Costa County sits in Covered California rating region 5. Region lines matter because two neighbors in different regions can pay different premiums for the exact same plan.
- Anthem Blue Cross
- Blue Shield of California
- Kaiser Permanente
- Health Net (varies by ZIP)
Had an Aetna CVS Health plan?
Aetna left Covered California for the 2026 plan year, and its former regions include Contra Costa County. If you were enrolled with Aetna, you should have been moved or asked to pick a new plan – it is worth a quick review to make sure your doctors are in your new network. Book a free review or call (855) 847-7020.
Final availability depends on your exact ZIP code – carriers draw their own service maps inside a county. We check your address against every carrier’s current filing before quoting.
Hospital systems your network should cover
The biggest coverage mistake in Contra Costa County is buying on price and finding out your hospital is out of network. Before you enroll, we verify which plans include:
- John Muir Health
- Kaiser Walnut Creek and Antioch
- Sutter Delta
- Contra Costa Regional Medical Center
On Medicare in Contra Costa County?
Medicare Supplement rates are set by ZIP code, and Medicare Advantage lineups change from city to city within the county. California’s Birthday Rule gives you a 60-day window each year, starting on your birthday, to switch Medigap plans with no health questions – we can check whether a switch saves you money this year. Book a Medicare call.
Free help is also available from HICAP, California’s Medicare counseling program, at 1-800-434-0222.
Carrier availability listed as of the 2026 plan year and subject to change. We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. Please contact Medicare.gov, 1-800-MEDICARE, or your local State Health Insurance Assistance Program (in California, HICAP at 1-800-434-0222) to get information on all of your options.