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
- Navigate to the respective health plan.
- Select the county, where applicable.
- 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 |
| 93943 |
| 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 |