Medicare Advantage plans in California, 2027
387 Medicare Advantage plans are sold in California for 2027 (391 in 2026); 257 are open to everyone and 174 of those have a $0 premium everywhere they are sold. 157,157 California members in September 2026 were in plans that end or leave their county for 2027.
What changes in California for 2027?
| In the state | 2026 | 2027 | Change |
|---|---|---|---|
| Plans sold in the state | 391 | 387 | ▼down 4 |
| Plans open to everyone | 271 | 257 | ▼down 14 |
| Plans with a $0 premium everywhere they are sold | 184 | 174 | ▼down 10 |
| Plans that lower the Part B premium | 43 | 41 | ▼down 2 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026.
Which companies sell the most plans in California?
Plans open to everyone, by parent company and the brands it sells under, 2027
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which California counties lose the most?
Plans end in or leave California counties 244 times for 2027. Counties with the most members in those plans come first; each links to its 2027 plan list.
| County | Plans open to all | $0 premium | Plans that end or leave | Their members here |
|---|---|---|---|---|
| San Diego | 46 | 37 | 23 | 30,358 |
| Los Angeles | 70 | 60 | 19 | 22,439 |
| Orange | 62 | 54 | 19 | 17,949 |
| Sacramento | 16 | 10 | 11 | 14,740 |
| Santa Clara | 19 | 10 | 11 | 8,930 |
| Riverside | 47 | 43 | 14 | 7,326 |
| Alameda | 16 | 9 | 7 | 6,488 |
| San Bernardino | 49 | 44 | 14 | 4,450 |
| Yolo | 14 | 9 | 12 | 3,828 |
| Contra Costa | 5 | 2 | 2 | 3,577 |
| Imperial | 5 | 3 | 8 | 3,417 |
| San Joaquin | 22 | 11 | 9 | 3,241 |
| Santa Barbara | 5 | 2 | 2 | 2,751 |
| Fresno | 19 | 14 | 7 | 2,532 |
| Ventura | 17 | 15 | 6 | 2,375 |
| San Luis Obispo | 8 | 6 | 3 | 2,292 |
| San Mateo | 18 | 11 | 9 | 2,212 |
| Solano | 5 | 2 | 5 | 2,128 |
| Kern | 21 | 17 | 6 | 1,714 |
| Butte | 2 | 2 | 1 | 1,622 |
| San Francisco | 25 | 13 | 9 | 1,498 |
| Sonoma | 7 | 2 | 2 | 1,496 |
| Mendocino | 2 | 2 | 1 | 1,450 |
| Tulare | 13 | 9 | 5 | 1,236 |
| Placer | 13 | 7 | 6 | 1,171 |
| Shasta | 2 | 2 | 1 | 1,021 |
| El Dorado | 5 | 2 | 1 | 725 |
| Tehama | 2 | 2 | 1 | 620 |
| Yuba | 4 | 2 | 1 | 614 |
| Sutter | 4 | 2 | 1 | 559 |
| Amador | 5 | 2 | 2 | 479 |
| Kings | 14 | 10 | 5 | 391 |
| Stanislaus | 21 | 11 | 5 | 367 |
| Napa | 4 | 3 | 1 | 315 |
| Merced | 8 | 5 | 1 | 211 |
| Tuolumne | 2 | 2 | 1 | 208 |
| Calaveras | 2 | 1 | 1 | 182 |
| Madera | 18 | 13 | 7 | 128 |
| Marin | 11 | 7 | 2 | 54 |
| Inyo | 2 | 2 | 1 | 45 |
| Mono | 4 | 3 | 1 | 18 |
| Alpine | 2 | 1 | 1 | 0 |
| Colusa | 0 | 0 | 0 | 0 |
| Del Norte | 2 | 2 | 0 | 0 |
| Glenn | 2 | 2 | 0 | 0 |
| Humboldt | 2 | 2 | 0 | 0 |
| Lake | 0 | 0 | 0 | 0 |
| Lassen | 2 | 1 | 0 | 0 |
| Mariposa | 6 | 3 | 0 | 0 |
| Modoc | 2 | 2 | 0 | 0 |
| Monterey | 6 | 3 | 0 | 0 |
| Nevada | 3 | 2 | 0 | 0 |
| Plumas | 4 | 3 | 0 | 0 |
| San Benito | 2 | 2 | 0 | 0 |
| Santa Cruz | 5 | 2 | 0 | 0 |
| Sierra | 2 | 1 | 0 | 0 |
| Siskiyou | 2 | 2 | 0 | 0 |
| Trinity | 0 | 0 | 0 | 0 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which large plans sold in California end?
| 2026 plan | Brand | Members in all states, Sept. 2026 |
|---|---|---|
| Aetna Medicare SignatureH5521-419 | Aetna Medicare | 11,844 |
| Sharp Direct Advantage VIPH5386-005 | Sharp Health Plan | 10,183 |
| Aetna Medicare SignatureH5521-425 | Aetna Medicare | 9,827 |
| Anthem Dual Advantage 2H4704-002 | Anthem Blue Cross Life and Health Insurance Company | 6,564 |
| Wellcare GivebackH5087-032 | Wellcare | 6,340 |
| Central Health Embrace Care PlanH5649-025 | Central Health Medicare Plan | 6,252 |
| Central Health Medicare PlanH5649-001 | Central Health Medicare Plan | 6,096 |
| Aetna Medicare EnhancedH5521-578 | Aetna Medicare | 5,335 |
| Sharp Direct Advantage VIP PlusH5386-006 | Sharp Health Plan | 4,551 |
| Central Health Classic Care Plan IIIH5649-023 | Central Health Medicare Plan | 4,485 |
Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which plans in California lower the Part B premium?
41 plans open to everyone and sold in at least one California county pay part of the Part B premium in 2027; the largest reduction comes first.
| 2027 plan | Brand | Monthly reduction |
|---|---|---|
| Alignment Health Smart 055H3815-055 | Alignment Health Plan | $197 |
| Astiva Health Savings PlanH1993-001 | Astiva Health | $186 |
| SCAN Essential SavingsH5425-133 | SCAN Health Plan | $185 |
| Alignment Health Smart 056H3815-056 | Alignment Health Plan | $179 |
| Astiva Health Savings Plan: NorCalH1993-011 | Astiva Health | $161 |
| Elite Core HMOH6368-002 | Elite Health Plan, Inc. | $154 |
| Alignment Health Smart 013H3815-013 | Alignment Health Plan | $150 |
| Alignment Health Smart 047H3815-047 | Alignment Health Plan | $146 |
| Alignment Health Smart 038H3815-038 | Alignment Health Plan | $135 |
| SCAN AlliedH5425-123 | SCAN Health Plan | $125 |
| Clever Care ValueH7607-015 | Clever Care Health Plan | $120 |
| Alignment Health ValorCare 053H3815-053 | Alignment Health Plan | $119 |
| Alignment Health Smart 040H3815-040 | Alignment Health Plan | $108 |
| Humana USAA Honor GivebackH5525-078 | Humana | $90 |
| Imperial Courage PlanH5496-016 | Imperial Health Plan of California, Inc. | $85 |
| Humana Gold Plus GivebackH5619-146 | Humana | $84 |
| Humana USAA Honor GivebackH5525-079 | Humana | $75 |
| Anthem I CareMore Premium SavingsH4161-012 | Anthem Blue Cross Partnership Plan | $62 |
| Humana USAA Honor Giveback with RxH5525-057 | Humana | $55 |
| Humana USAA Honor GivebackH5619-121 | Humana | $45 |
Show the other 21 giveback plans
Source: CMS plan benefit package files, 2027 and 2026; CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which California counties have no Medicare Advantage plan open to everyone in 2027?
3 counties in California have no plan open to everyone for 2027: people there can use Original Medicare with a stand-alone drug plan and a Medigap policy, or a special needs plan if they qualify.
Colusa, CA
No Medicare Advantage plan open to everyone is sold in Colusa, California for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 10 stand-alone drug plans offered in California.
Lake, CA
No Medicare Advantage plan open to everyone is sold in Lake, California for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 10 stand-alone drug plans offered in California.
Trinity, CA
No Medicare Advantage plan open to everyone is sold in Trinity, California for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 10 stand-alone drug plans offered in California.
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
3,751,199 of California's 7,284,886 people with Medicare were in a Medicare Advantage plan in September 2026 (51%).
What else should you check?
- Every plan not offered in 2027By company and state
- Part B giveback plansWhere they are sold
- Every statePlan counts for 2027