Open enrollment 2027
Medicare Advantage in California, county by county.
34 of 58 counties have a page with their 2027 plans, the plans that end and who must pick a new plan. 3,718,450 people in the state had an individual Medicare Advantage plan in October 2026.
Sources: CMS CY2027 and CY2026 plan files, CMS CPSC enrollment October 2026, CMS 2027 Plan Crosswalk (October 1, 2026). Smaller counties open in the free lookup instead.
Counties
- Alameda
- Alpinelookup
- Amador
- Buttelookup
- Calaveraslookup
- Colusalookup
- Contra Costa
- Del Nortelookup
- El Dorado
- Fresno
- Glennlookup
- Humboldtlookup
- Imperial
- Inyolookup
- Kern
- Kings
- Lakelookup
- Lassenlookup
- Los Angeles
- Madera
- Marin
- Mariposalookup
- Mendocinolookup
- Merced
- Modoclookup
- Monolookup
- Monterey
- Napa
- Nevadalookup
- Orange
- Placer
- Plumaslookup
- Riverside
- Sacramento
- San Benitolookup
- San Bernardino
- San Diego
- San Francisco
- San Joaquin
- San Luis Obispo
- San Mateo
- Santa Barbara
- Santa Clara
- Santa Cruz
- Shastalookup
- Sierralookup
- Siskiyoulookup
- Solano
- Sonoma
- Stanislaus
- Sutterlookup
- Tehamalookup
- Trinitylookup
- Tulare
- Tuolumnelookup
- Ventura
- Yolo
- Yuba
All states. Agents can get every county in one file with the AEP 2027 County Kit.