Some of the health plan expansions approved for 2025 cover only certain ZIP codes within a county. The exact service areas are still contingent upon successful provider negotiations, completion of the 2025 rate development process, as well as Department of Managed Health Care (DMHC) approval where applicable.

For more information regarding changes to our health plans or benefits, view our Annual Health Plan Changes page.

How to Use this Table

  1. Navigate to the respective health plan.
  2. Select the county, where applicable.
  3. Search the table for the ZIP code.

If the ZIP code appears in the table, then the respective health plan may expand there in 2025.

Blue Shield Trio HMO

Shasta county
ZIP Code
96001
96002
96003

Kaiser Permanente (HMO)

Monterey county
ZIP Code
93901
93902
93905
93906
93907
93912
93915
93933
93955
93962
95004
95012
95039
95076

United Healthcare Signature Value Harmony (HMO)

Contra Costa

Contra Costa county
ZIP Code
94506
94507
94509
94511
94513
94516
94517
94518
94519
94520
94521
94522
94523
94524
94525
94526
94527
94528
94529
94530
94531
94547
94548
94549
94553
94556
94561
94563
94564
94565
94569
94570
94572
94575
94582
94583
94595
94596
94597
94598
94801
94802
94803
94804
94805
94806
94807
94808
94820
94850

Solano

Solano county
ZIP Code
94510
94591