Where is the health plan of san mateo county located? Health Plan of San Mateo. 801 Gateway Blvd, Suite 100. South San Francisco, CA 94080. Assists Medi-Cal recipients with information about the Health Plan of San Mateo County which provides a primary care physician for Medi-Cal recipients in the county.Where can i find a primary care physician in san mateo county? 801 Gateway Blvd, Suite 100. South San Francisco, CA 94080. Assists Medi-Cal recipients with information about the Health Plan of San Mateo County which provides a primary care physician for Medi-Cal recipients in the county.How to contact the county of san mateo in california? CONTACT US. County of San Mateo. 400 County Center, Redwood City, CA 94063. (650) 363-4000. Office hours are M-F (holidays excepted) 8:00 a.m. to 5:00 p.m. Previous. Next. Finding County Center ». Media Contacts ».Does hicap of san mateo county offer phone appointments? Until further notice, HICAP of San Mateo County is only offering phone appointments with registered HICAP counselors due to COVID-19. Virtual presentations are also available during shelter in place. Would you like assistance with choosing a health or prescription drug plan that covers all of your medications?