Independent guide. Not affiliated with CMS, HHS, or Medicare.gov. Data updated October 24, 2026
Medicare Plan Exits County-level 2027 plan exit tracker

2027 Medicare Advantage exits · CA county list

Medicare Advantage Plans Leaving California in 2027

138,212 Medicare Advantage members in California are in plans that CMS lists as non-renewed for 2027. The exits reach 38 counties and 49 contract-plan combinations. Check your county and your plan before December 7, 2026.

138,212 Affected members in non-renewed plans.
38 Counties with at least one exit and affected members.
49 2026 plans ending in California.
4.7% Share of the state’s 2026 county-level MA enrollment.

Check your California county

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What is changing in California

The 2026 Medicare Advantage market in California includes 390 contract-plan combinations across 57 counties, with 2,964,491 members in the October 2026 CPSC file. For 2027, 49 of those plans are marked as terminated or non-renewed. The affected population is 138,212 members, or 4.7% of the state’s county-level enrollment.

The largest local impact is in San Diego, where 28,746 members (10.2% of the county’s MA enrollment) are in 17 ending plans. The county still has 79 2027 plan options in the crosswalk, so most members should have alternatives in the same county — but the networks and drug lists can differ.

A plan marked continuing is not automatically unchanged. The 2027 crosswalk includes “Renewal Plan,” “Renewal Plan with SAR” (service area reduced), “Renewal Plan with SAE” (service area expanded), and “Consolidated Renewal Plan” (plan ID or plan structure changes). Check the plan detail on each county page, and confirm your doctors and drugs with the plan.

Counties with the largest affected populations

The table lists the 25 counties with the most affected members. Counties marked “County page” have a full plan-level page; the rest are covered by this state page and Medicare Plan Finder.

California counties with a 2027 Medicare Advantage exit
County Affected 2026 MA Ending plans 2027 options Detail
San Diego 28,746 280,956 17 79 County page
Los Angeles 24,745 812,110 16 129 County page
Orange 16,222 296,150 14 108 County page
Santa Clara 8,847 129,588 9 41 State page
Sacramento 7,366 121,169 8 41 State page
Riverside 6,518 247,220 13 96 State page
Alameda 5,404 103,700 5 46 State page
San Bernardino 3,984 201,978 10 99 State page
Contra Costa 3,563 78,232 3 26 State page
Imperial 3,250 12,246 7 13 State page
Santa Barbara 2,755 12,227 2 6 State page
San Mateo 2,191 49,896 7 28 State page
San Luis Obispo 2,141 12,594 2 14 State page
Solano 2,111 31,639 5 19 State page
San Joaquin 2,003 57,898 6 47 State page
Yolo 1,953 11,112 7 24 State page
Fresno 1,768 63,070 5 38 State page
Ventura 1,709 55,980 4 42 State page
Kern 1,662 55,311 5 41 State page
Butte 1,591 2,878 1 4 State page
San Francisco 1,486 57,997 7 42 State page
Sonoma 1,486 48,314 2 10 State page
Tulare 1,223 23,957 5 17 State page
Shasta 1,007 1,824 1 3 State page
El Dorado 714 13,366 1 13 State page

Affected members are the October 2026 CPSC enrollment of plans the 2027 crosswalk marks as terminated or non-renewed. “2027 options” counts distinct 2027 contract-plan targets in the crosswalk.

Show all 38 counties with an exit
All California counties with affected enrollment
County Affected 2026 MA Ending plans 2027 options
San Diego 28,746 280,956 17 79
Los Angeles 24,745 812,110 16 129
Orange 16,222 296,150 14 108
Santa Clara 8,847 129,588 9 41
Sacramento 7,366 121,169 8 41
Riverside 6,518 247,220 13 96
Alameda 5,404 103,700 5 46
San Bernardino 3,984 201,978 10 99
Contra Costa 3,563 78,232 3 26
Imperial 3,250 12,246 7 13
Santa Barbara 2,755 12,227 2 6
San Mateo 2,191 49,896 7 28
San Luis Obispo 2,141 12,594 2 14
Solano 2,111 31,639 5 19
San Joaquin 2,003 57,898 6 47
Yolo 1,953 11,112 7 24
Fresno 1,768 63,070 5 38
Ventura 1,709 55,980 4 42
Kern 1,662 55,311 5 41
Butte 1,591 2,878 1 4
San Francisco 1,486 57,997 7 42
Sonoma 1,486 48,314 2 10
Tulare 1,223 23,957 5 17
Shasta 1,007 1,824 1 3
El Dorado 714 13,366 1 13
Tehama 616 969 1 2
Yuba 606 2,007 1 5
Sutter 555 737 1 3
Amador 473 2,145 2 10
Kings 389 6,349 4 20
Napa 309 9,793 1 8
Placer 233 38,855 4 28
Tuolumne 207 726 1 5
Calaveras 176 1,089 1 7
Stanislaus 75 49,442 3 36
Madera 65 10,997 2 33
Inyo 45 158 1 2
Mono 18 80 1 2

Carriers with the most affected members in California

The table groups ending plans by parent organization and counts the 2026 members behind them. It is not a ranking of plan quality or a recommendation.

California parent organizations with affected members
Organization Affected members Ending plans Counties
Aetna Medicare 41,938 34 13
Central Health Medicare Plan 31,700 93 23
Sharp Health Plan 17,328 5 2
UnitedHealthcare 8,949 3 3
Anthem Blue Cross Life and Health Insurance Company 7,686 14 14
Wellcare 6,853 6 6
SCAN Health Plan 4,545 8 4
Anthem Blue Cross 3,983 5 5
Providence Medicare Advantage Plans 3,926 1 1
Humana 3,186 1 1

Parent organization names come from the CMS CPSC Contract Info file. One organization can operate several contracts and plan names.

Counties with a published page

California deadlines

2027 Medicare Advantage dates for California
Event Date
Annual Election Period (AEP) October 15 – December 7, 2026
Non-renewal Special Enrollment Period December 8, 2026 – February 28, 2027
2027 plan year begins January 1, 2027
Medicare Advantage Open Enrollment Period January 1 – March 31, 2027

What to do next

  1. Read your notice and confirm the plan ID Non-renewal notices for contracts ending December 31 must be sent by October 2, 2026.
  2. Compare the 2027 plans in your county Check networks, drug lists, premiums, and service areas. A continuing plan can still change benefits.
  3. Enroll by December 7, 2026 Coverage chosen during the Annual Election Period starts January 1, 2027.
  4. Use the non-renewal SEP if you need it December 8, 2026 through February 28, 2027, for people whose plan is leaving.
  5. Check Medigap if you return to Original Medicare The federal guaranteed-issue window is November 1, 2026 through March 4, 2027 for a December 31, 2026 plan ending.

California Medicare Advantage questions

How many Medicare Advantage plans are leaving California in 2027?

The 2027 CMS crosswalk marks 49 contract-plan combinations serving California as terminated or non-renewed. Those plans had 138,212 members in 38 counties where CPSC reports enrollment.

Which California county is most affected?

San Diego has the largest affected population: 28,746 members, or 10.2% of its 2026 Medicare Advantage enrollment. 17 of its 97 2026 plans are ending.

Can I get free help in California?

Yes. California Health Insurance Counseling and Advocacy Program (HICAP) provides free, unbiased Medicare counseling. Call 1-800-434-0222 or visit the state SHIP page.

Do I have to change plans if my plan is not on the exit list?

No. A plan marked continuing stays in the CMS crosswalk for 2027, but benefits, premiums, networks, and drug lists can still change. Review your Annual Notice of Change and confirm your doctors and drugs before the Annual Election Period ends December 7, 2026.

Sources and data notes

State totals are built from the October 2026 CMS CPSC files and the CMS 2027 Part C&D Plan Crosswalk. Star ratings are 2027 contract-level Part C ratings. Data version 2026-10-24; last updated October 24, 2026. Read the methodology and limitations.

  1. Monthly Enrollment by Contract/Plan/State/County (CPSC), October 2026 — Centers for Medicare & Medicaid Services.
  2. 2027 Part C&D Plan Crosswalk — Centers for Medicare & Medicaid Services.
  3. 2027 Star Ratings Data Tables — Centers for Medicare & Medicaid Services.
  4. MA Plan Directory — Centers for Medicare & Medicaid Services.
  5. Medicare Advantage in 2026: Enrollment Update and Key Trends — KFF.
  6. CNN: More than 3 million Medicare Advantage enrollees need to find new plans for 2027 — Better Medicare Alliance.
  7. Medicare Advantage insurer exits pile up for 2027 — Modern Healthcare.
  8. CMS Finalizes 2027 Medicare Advantage Rates: 1,471 Counties, 32 Carriers — SeniorWire.

This page is information only and is not insurance advice. Medicare Plan Exits is not affiliated with CMS, HHS, or Medicare.gov. Confirm plan details with the plan, your SHIP, or Medicare.gov before enrolling.