UnitedHealthcare in California for 2027
Partly. UnitedHealthcare offers 42 Medicare Advantage plans in 22 California counties in 2027, down from 43 plans in 2026. It leaves Lake, Mendocino and Santa Clara counties. Under the CMS crosswalk, 3 of its 2026 California plans end; they had at least 9,002 members in September 2026.
| 2026 | 2027 | |
|---|---|---|
| Medicare Advantage plans in California | 43 | 42 |
| California counties with at least one plan | 25 | 22 |
| Plans in Los Angeles County | 8 | 8 |
Distinct Medicare Advantage plan IDs in the CMS CY2026 and CY2027 Landscape files (September 2026 releases), Special Needs Plans included, stand-alone drug plans excluded.
UnitedHealthcare in Los Angeles County
In Los Angeles County, UnitedHealthcare lists 8 Medicare Advantage plans for 2027, compared with 8 in 2026. One of its 2026 plans in the county is not offered there in 2027: AARP Medicare Advantage from UHC CA-37 (HMO-POS) H0543-251, with 3,212 county members in September 2026.
The plans that end
These UnitedHealthcare plans from 2026 end in California under the CMS crosswalk: AARP Medicare Advantage from UHC CA-8 (HMO-POS) H0543-189, AARP Medicare Advantage from UHC CA-37 (HMO-POS) H0543-251 and AARP Medicare Advantage from UHC CA-10 (HMO-POS) H0543-193. Where we have a page for the plan, its name links to the plan ID, the counties it served and what members can do.
If your plan is one of them
Your plan should have mailed you a letter. You can choose new coverage during Annual Enrollment, October 15 to December 7, and members of a plan that ends also get a Special Enrollment Period from December 8 to the last day of February. Leaving a plan that ends often gives the right to buy a Medicare Supplement policy with no health questions. Lara Goulson compares the options available where you live with you, at no cost, in English, Spanish or Hebrew: (818) 472-5484.
Your deadlines and rights when a plan ends or leaves your county
You can use the Annual Enrollment Period, October 15 through December 7, to choose your 2027 coverage. When your plan is not renewed for 2027, whether the insurer ends that plan, stops offering it in your county or ends its whole contract with Medicare, you have a Special Enrollment Period from December 8 through the last day of February. Coverage you choose by December 31 starts January 1 with no gap, while coverage you choose in January starts February 1 and coverage you choose in February starts March 1, leaving you on Original Medicare alone until then. If you make no choice, you return to Original Medicare automatically, but for most people drug coverage does not follow: unless you choose a Part D plan you may start the year without it, and if you later join a drug plan after going 63 days or more in a row without creditable drug coverage, a late enrollment penalty is added to your premium for as long as you have Medicare drug coverage, unless you get Extra Help. If you have Extra Help or Medi-Cal, Medicare may assign you a drug plan automatically, though you can still choose a different one. When your plan ends, you can also have a guaranteed issue right to buy certain Medigap policies with no medical underwriting, from the date you receive your plan's termination notice until 63 days after your coverage ends, but a Medigap policy works only with Original Medicare, and joining another Medicare Advantage plan does not extend that window. If you have Medi-Cal, insurers generally cannot sell you a Medigap policy. Our guide to a plan ending for 2027 explains each of these in more detail.
Next steps for 2027
These pages can help you compare your choices for 2027. The Medigap rates and Medicare Advantage pages cover Los Angeles County. Lara is licensed across California and can go over your options with you at no cost.
Questions about your plan?
Call Lara Goulson at (818) 472-5484. She goes through your letter, your doctors and your medications with you, at no cost.
Call (818) 472-5484 for help at no cost.
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