Medicare in the region
The North State: what shapes the choice here
North of Sacramento the Medicare question changes shape: it is less about which of many plans and more about whether an Advantage plan exists at your address with a network you can reach. Redding and Chico have real menus built on Mercy, Shasta Regional and Enloe; the coast and the mountains have thin ones, and specialty care usually means Sacramento or the Bay Area.
For a lot of North State households, Original Medicare with a Medigap policy and a Part D plan is the coverage that works everywhere — at the local hospital, at UC Davis, and at the grandchildren’s in Oregon. We say so when it is true.
What changed for 2026: the North State is where the national Advantage pullback landed hardest in California — UnitedHealthcare, Humana and Aetna withdrew from rural counties, and some counties (Plumas, Modoc, Trinity among them) have only one or two plans or none. A plan leaving you opens a Special Enrollment Period and, in most cases, a guaranteed-issue right to Medigap. Partnership HealthPlan runs Medi-Cal across the region.
Counties: Shasta, Butte, Humboldt, Tehama, Siskiyou, Mendocino, Lake, Del Norte, Trinity, Lassen, Plumas, Modoc, Glenn, Colusa.
Health systems
- Mercy Medical Center Redding (Dignity)
- Shasta Regional Medical Center
- Enloe Health (Chico)
- Providence St. Joseph (Eureka)
- Adventist Health (Ukiah, Clearlake)
- Sutter (Yuba City, Lakeside)
- UC Davis Health (referrals)
Each contracts differently with each plan; we check your doctors first.
Cities in this region
When you can enroll
Turning 65? Your Initial Enrollment Period is the 7 months around your birthday. Already on Medicare? The Annual Election Period is Oct 15–Dec 7, Medicare Advantage Open Enrollment runs Jan 1–Mar 31, and California’s Medigap birthday rule gives you 60 days from your birthday each year to switch supplements without health questions.