California Employer Resource · Contra Costa County
🏢 Group Health Insurance in Contra Costa County, CA
I’m Matthew Reilly, a licensed California health, life, and group insurance agent. Contra Costa County runs from the Carquinez Strait to the I-680 business corridor, and I help employers across its refineries, offices, and shops compare group health plans.
Martinez, the Contra Costa County seat, and the Carquinez Strait. Photo: Alfred Twu, CC0, via Wikimedia Commons.
Contra Costa County is Spanish for “opposite coast,” a nod to its spot across San Francisco Bay from the city. Martinez is the county seat, and the county mixes oil refining and industry with business parks along I-680, plus Mount Diablo State Park, created in 1921. Industrial and office employers have different workforces, so confirm that your employees’ doctors and hospitals are in the plan’s network.
🏢 What group health options exist for Contra Costa County employers?Carrier Access
Employers in Contra Costa County have access to the broader California small- and large-group market through the carrier network I work with through our vendor partners. Which carriers have active networks in your exact location depends on which hospital systems and medical groups your employees use — I confirm the real, current list for your ZIP code before you ever see a quote, rather than promising specific carrier names up front.
📋 Does group size work differently in Contra Costa County than the rest of California?Group Size
No — the small group (1–50 employees) vs. large group (51+) split, participation minimums, and open enrollment timing are all set at the state and federal level, not the county level. What does change locally is which hospital systems and medical groups are strongest in your employees’ network. See the Coverage Guide for how group size and plan rules work statewide.
🗓️ Win Your Q4 Open Enrollment
👨⚕️ “Fourth-quarter open enrollment moves fast. So do we, with fast quote turnaround when the clock is ticking.”
👩⚕️ “Your census is uploaded securely, and every plan is compared side by side in the Professional Suite before your renewal date lands. When did your current broker last show you the full market?”
🤝 Do I need a local agent, or can you help from outside Contra Costa County?Remote Access
I’m licensed to sell health and life insurance throughout California, and most of my clients handle everything by phone, text, and video — comparing options, signing paperwork, and getting enrolled without ever needing an in-person meeting. Contra Costa County employers get the same attention and the same carrier access as my Orange County clients; I just handle it remotely instead of walking into your office.
📍 Which cities in Contra Costa County do you work with?Service Area
Cities I work with: Concord, Richmond, Antioch, San Ramon, Walnut Creek, Pittsburg, Danville, Brentwood, Martinez, Pleasant Hill
Don’t see your city listed? I’m licensed statewide — reach out and I’ll confirm coverage for your exact address.
Legal & Compliance Disclaimer
This page is general information, not a guarantee of plan availability, network participation, or savings. Carrier networks and provider participation vary by ZIP code and are subject to change — always verify network status directly with your providers before enrolling. No premium, rate, or price information is included or implied. This website is not affiliated with, endorsed by, or sponsored by the County of Contra Costa, the City of Martinez, or any government agency.
