Medicare in Contra Costa County, California

The Local Health Landscape

Contra Costa County spans urban Richmond to suburban San Ramon Valley, with three competing hospital systems shaping plan networks.

Hospitals Serving Contra Costa County

• John Muir Health, Walnut Creek & Concord
• Contra Costa Regional Medical Center, Martinez
• Kaiser Permanente Walnut Creek, Antioch & Richmond

Medicare Plan Types Available in Contra Costa County

Beneficiaries here choose among Medicare Advantage (Part C), standalone Part D drug plans, and Medigap supplements — availability and pricing are zip-code specific.

Find a Medicare Agent in Concord

Licensed Medicare agents serving Contra Costa County can help you compare plans and enroll at no cost to you. They’re familiar with the specific plans available in the Concord area and throughout Contra Costa County.

Find an Agent in Contra Costa County →

Compare Plans in Contra Costa County

Enter your zip code to see Medicare Advantage, Part D, and Medigap plans available in Contra Costa County.

Compare Plans at PlanMatch.com →

Senior Services in Contra Costa County

• HICAP (Free Medicare Counseling): Call 1-800-434-0222 to reach your local Contra Costa County HICAP office
• Area Agency on Aging: Contact your local AAA for senior programs, Meals on Wheels, and transportation assistance
• In-Home Supportive Services (IHSS): Apply through Contra Costa County Department of Social Services
• Medi-Cal: Apply through your county office or at CoveredCA.com

Key Medicare Information

• Medicare Advantage plans — All-in-one coverage, many $0 premium options
• Medigap plans — Supplement Original Medicare, California birthday rule applies
• Part D drug plans — $2,100 annual out-of-pocket cap in 2026
• Medi-Cal dual eligibility — Extra benefits for low-income beneficiaries
• Medicare Savings Programs — Help with premiums and cost-sharing