Hospitals in Contra Costa County, California

8 Medicare-certified hospitals serve Contra Costa County, averaging 3.0 out of 5 overall among rated providers. Below are provider profiles with CMS ratings, inspections, staffing, and ownership.

Browse: Hospitals in California · all care types in Contra Costa County · Cities: Martinez, Concord, Walnut Creek, Antioch, San Ramon

Hospitals profiles in Contra Costa County

Hospital · Government - Local Contra Costa Regional Medical Center Martinez, CA 94553 CMS rating 4.0 / 5 Hospital · Voluntary non-profit - Private John Muir Behavioral Health Center Concord, CA 94520 Not CMS-rated Hospital · Voluntary non-profit - Private John Muir Medical Center - Concord Campus Concord, CA 94520 CMS rating 4.0 / 5 Hospital · Voluntary non-profit - Other John Muir Medical Center - Walnut Creek Campus Walnut Creek, CA 94598 CMS rating 2.0 / 5 Hospital · Voluntary non-profit - Private Kaiser Foundation Hospital - Antioch Antioch, CA 94531 CMS rating 1.0 / 5 Hospital · Voluntary non-profit - Private Kaiser Foundation Hospital - Walnut Creek Walnut Creek, CA 94596 CMS rating 3.0 / 5 Hospital · Proprietary San Ramon Regional Medical Center San Ramon, CA 94583 CMS rating 4.0 / 5 Hospital · Voluntary non-profit - Private Sutter Delta Medical Center Antioch, CA 94509 CMS rating 3.0 / 5

Cities in Contra Costa County

Martinez, CA 1 facilities Concord, CA 2 facilities Walnut Creek, CA 2 facilities Antioch, CA 2 facilities San Ramon, CA 1 facilities

Choosing a hospital in Contra Costa County

When comparing hospitals, review the CMS overall rating and the underlying measure groups, confirm that the services you need are offered, and check whether the hospital participates in your insurance network. Ratings are signals, not medical advice.

The best comparison uses several signals at once: inspection history, nurse staffing, quality measures, and the specific services a person needs. Ratings summarize those signals but never replace a visit or a conversation with staff.

Visit candidates in Contra Costa County when possible, ask how care plans are set and reviewed, and confirm costs, coverage, and availability in writing. Staffing consistency and clear family communication matter as much as any published score.

Frequently asked questions

How many hospitals are in Contra Costa County?

The current CMS data lists 8 Medicare-certified hospitals in Contra Costa County, California, with an average overall CMS rating of 3.0 out of 5 among rated providers.

Which cities in Contra Costa County have hospitals?

Martinez, Concord, Walnut Creek, Antioch, San Ramon have Medicare-certified hospitals in the current data.

Data sources

Source: CMS Provider Data Catalog. Data processing date: 2026-10-06.

Important disclosures

Informational only, not medical advice. This directory publishes public data and general information. It does not provide medical advice, diagnosis, or treatment recommendations, and it is not a substitute for consulting a qualified health care professional or Medicare.

Not affiliated. HealthcareFacilities.org is an independent, privately operated directory. It is not affiliated with, endorsed by, or operated by the Centers for Medicare & Medicaid Services (CMS), Medicare, or any government agency. CMS has not reviewed or endorsed this site.

Verify before you act. Facility information is derived from public federal datasets and may lag or contain errors. Always confirm current ratings, services, availability, and coverage directly with the provider and at Medicare.gov.

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