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Medicare Advantage plans changing or leaving California counties for 2027

Across 56 California counties, 316 Medicare Advantage plans are leaving for 2027 and 455 are changing. Pick your county for its numbers.

316Leavingoffered last year, not this year
455Changingoffered both years, listing differs
771Totalplans leaving or changing
These counts come from comparing the two official CMS Medicare Advantage Landscape files for 2026 and 2027. A plan counts as leaving when it was offered in the county for 2026 and is not offered there for 2027. A plan counts as changing when it is offered in both years but its 2027 listing differs on something a member would notice: the premium, the drug deductible, the plan type, or the plan name. Only the counts are shown here. This page does not name plans, list premiums or benefits, or recommend anything.
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2027 PLAN ALERT

Medicare Advantage plans in your area are changing or leaving for 2027.

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Annual Enrollment: Oct 15 – Dec 7

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BEFORE YOU ENROLL

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  • Your doctors — confirmed in-network for 2027
  • Your prescriptions — checked against the plan's 2027 drug tiers
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California counties, most changes first

CountyLeavingChangingTotal
Los Angeles County233861
San Diego County262854
Orange County213253
Riverside County173249
San Bernardino County173249
San Francisco County122234
San Joaquin County141933
Santa Clara County151833
Stanislaus County101828
Alameda County101727
Sacramento County131427
Fresno County111526
Madera County111526
Yolo County131326
Ventura County81422
Placer County71421
San Mateo County12921
Kern County81018
Marin County21315
San Luis Obispo County5914
Kings County9413
Merced County21113
Tulare County9413
Imperial County8412
Solano County549
Amador County347
Contra Costa County257
El Dorado County156
Santa Barbara County246
Monterey County145
Sonoma County235
Santa Cruz County044
Yuba County134
Alpine County123
Calaveras County213
Mariposa County033
Mono County213
Sutter County123
Inyo County202
Napa County112
Tuolumne County202
Butte County101
Lake County101
Lassen County011
Mendocino County101
Nevada County011
Plumas County011
Shasta County101
Sierra County011
Tehama County101
Del Norte County000
Glenn County000
Humboldt County000
Modoc County000
San Benito County000
Siskiyou County000

What to do before December 7

If you are in a Medicare Advantage plan today, your plan must send you an Annual Notice of Change by September 30 that spells out exactly what is different for 2027. Read it before the Annual Enrollment Period, which runs October 15 through December 7.

If your plan is leaving your county, you will get a separate notice and a Special Enrollment Period to choose new coverage. If you do nothing, you may be returned to Original Medicare without drug coverage, so it is worth acting during the window.

A licensed agent can check your doctors and prescriptions against the plans that will actually operate in your county next year. For unbiased help, contact Medicare.gov, 1-800-MEDICARE, or your State Health Insurance Assistance Program (SHIP).

Good to know

Frequently asked questions

Why do the numbers differ so much from county to county?
Medicare Advantage plans are approved county by county, so a plan can leave one county and stay in the next. Each county's count reflects only the plans approved for that county.
What does “changing” mean for 2027?
A plan offered in both 2026 and 2027 whose 2027 listing differs on premium, drug deductible, plan type, or plan name. The count is neutral: it does not say whether a change helps or hurts any particular member.
Do you list which plans are leaving?
No. We publish area-level counts only, never plan names, premiums or benefits. Your Annual Notice of Change, Medicare.gov, 1-800-MEDICARE, or a licensed agent can tell you about a specific plan.
Sources & further reading

For personalized answers, contact Medicare.gov, 1-800-MEDICARE, or your local SHIP.

Medicare plans in your area changing for 2027 — check yoursCall