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Data study · CMS 2026 vs. 2027 plan files · Updated October 18, 2026

Where $0 Medicare Advantage plans are disappearing in 2027

We compared every general-audience Medicare Advantage plan in the CMS landscape files for 2026 and 2027, county by county. 74 counties that had at least one $0-premium plan this year have none for 2027. About 2.9 million people are in a plan that ends or stops covering their county, and 72% of the 3,107 counties with a plan have fewer to pick from. Open enrollment runs October 15 to December 7, 2026.

74counties lose every $0-premium plan
2.9 millionpeople whose plan ends or leaves their county
$4,174 → $4,870cheapest worst-case year in the typical county
$5,900 → $6,600median in-network out-of-pocket cap

Key findings

  1. 74 counties lose all of their $0-premium plans. Minnesota (22) and North Dakota (22) account for 44 of them; the rest are in Idaho, Oklahoma, South Dakota, Montana, Colorado, Nebraska, Washington, and Utah. 67 of the 74 are nonmetro counties. In 61 of them no general-audience Medicare Advantage plan is offered at all for 2027; the other 13 still have plans, but every one charges a premium. About 40,000 people were in a Medicare Advantage plan in these counties in October 2026, and 98% of them are in a plan that ends or leaves the county. Only 5 counties gain a $0 option they didn’t have.
  2. About 2.9 million people are in a plan that ends or leaves their county. That’s 13.5% of the 21.5 million people in general-audience Medicare Advantage plans: their plan ends for 2027 or no longer covers their county. If they don’t pick a new plan, they go back to Original Medicare on January 1. Of the 16.5 million people in a $0-premium plan, about 2.0 million are in one that ends or leaves their county, and about 689,000 more are in one that stays but starts charging a premium where they live.
  3. The cheapest bad year costs more. CMS projects the average Medicare Advantage premium, weighted by enrollment and including Special Needs Plans, to fall 16.5% for 2027. But premiums are only part of the bill. Add a year of premiums to the out-of-pocket cap, and the lowest-cost plan with drug coverage in the typical county goes from $4,174 to $4,870. That worst-case cost rises in 2,325 of 3,032 counties and falls in 351.
  4. Higher out-of-pocket caps. The median in-network maximum out-of-pocket rose from $5,900 to $6,600. CMS raised the ceiling from $9,250 to $9,850, and 383 plans (10.8%) sit right at it, up from 336 (9.0%).
  5. Fewer plans almost everywhere, and the cuts hit PPOs. The number of plans fell from 3,753 to 3,553 (−5.3%), and $0-premium plans from 2,562 to 2,443 (−4.6%). PPO plans fell from 1,591 to 1,426, while HMO plans went from 2,139 to 2,115. 2,236 of 3,107 counties have fewer plans than in 2026; 547 have more. The typical nonmetro county goes from 22 plans to 18; the typical metro county from 33.5 to 30.
  6. Twelve parent companies stop selling general-audience Medicare Advantage plans, led by Group 1001 (Clear Spring Health), Molina Healthcare (Central Health Medicare Plan and others), and CHRISTUS Health (CHRISTUS Health Advantage); four of the twelve still offer Special Needs Plans. Four new ones enter. Among those that stay, Health Care Service Corporation shrinks the most, from 948 counties to 450; Devoted Health grows the most, from 999 to 1,341.
  7. More plans rated 4 stars, fewer at the top. The share of plans under a contract rated 4 stars or higher rose from 58.0% to 62.5%, but plans rated 4.5 or 5 stars fell from 1,241 to 806. These are counts of plans, not weighted by how many people are in them.

Counties losing every $0 plan

A $0 plan premium was available in 3,094 of the 3,105 counties with a general-audience plan in 2026. For 2027 that drops to 3,025 of 3,040. 67 of the 74 counties losing every $0 plan are nonmetro, by the USDA’s 2023 Rural-Urban Continuum Codes, and 62 are in the Upper Midwest and Plains (Minnesota, the Dakotas, Nebraska, Oklahoma and Montana).

Counties that lose every $0-premium plan in 2027, by state

General-audience Medicare Advantage plans. Hover or tab to a bar for the share of the state’s $0 counties.

Minnesota: 22 of 84 counties with a $0 plan in 2026 have none in 2027 Minnesota 22North Dakota: 22 of 53 counties with a $0 plan in 2026 have none in 2027 North Dakota 22Idaho: 7 of 43 counties with a $0 plan in 2026 have none in 2027 Idaho 7Oklahoma: 7 of 77 counties with a $0 plan in 2026 have none in 2027 Oklahoma 7South Dakota: 6 of 51 counties with a $0 plan in 2026 have none in 2027 South Dakota 6Montana: 3 of 50 counties with a $0 plan in 2026 have none in 2027 Montana 3Colorado: 2 of 53 counties with a $0 plan in 2026 have none in 2027 Colorado 2Nebraska: 2 of 87 counties with a $0 plan in 2026 have none in 2027 Nebraska 2Washington: 2 of 39 counties with a $0 plan in 2026 have none in 2027 Washington 2Utah: 1 of 28 counties with a $0 plan in 2026 have none in 2027 Utah 1

Source: YourBestHealthPlans analysis of CMS CY2026 and CY2027 landscape files.

In 65 of the 74 counties, every company that sold a $0 plan there in 2026 sells no general-audience plan there in 2027: the carrier left rather than adding a premium. The parent companies whose $0 plans were in these counties in 2026:

Parent organization (CMS)Plan brandAffected counties with its $0 plan in 2026Of those, counties it leaves in 2027
Blue Cross Blue Shield of Michigan Mutual Ins. Co.NextBlue of North Dakota; Wellmark Advantage Health Plan2525
UnitedHealth Group, Inc.UnitedHealthcare2423
Humana Inc.Humana1313
Aware Integrated, Inc.Blue Cross and Blue Shield of Minnesota88
Medica Holding CompanyMedica88
CVS Health CorporationAetna Medicare55
Health Care Service CorporationBlue Cross and Blue Shield of IL, NM, OK, TX; Blue Cross and Blue Shield of Montana33
Allina Health and Aetna Insurance Holding CompanyAllina Health Aetna Medicare22
Centene CorporationWellcare22
HealthPartners, Inc.HealthPartners22
Intermountain Health Care, Inc.Select Health11

A county can appear under more than one carrier. Parent organization names are as CMS reports them.

Other options remain in many of these counties. A Medicare Cost plan is still sold in 46 of the 74 counties, including 41 of the 61 with no general-audience Medicare Advantage plan left. Cost plans are a different kind of Medicare health plan: you can also see doctors outside the network under Original Medicare rules. None of them is $0; the cheapest premium CMS lists is $48 to $53 a month, depending on the county. Special Needs Plans are also sold in many of these counties for people who qualify, such as those with both Medicare and Medicaid. And Original Medicare, with or without a Medigap policy and a Part D drug plan, is available everywhere.

All 74 counties (10 states)
County$0 plans in 2026All plans 2026 → 2027MA enrollees, Oct. 2026Cost plan in 2027
Alamosa, ColoradoNonmetro37 → 0689No
Rio Grande, ColoradoNonmetro24 → 0669No
Benewah, IdahoNonmetro23 → 0262No
Blaine, IdahoNonmetro47 → 11,021No
Idaho, IdahoNonmetro24 → 0617No
Latah, IdahoNonmetro24 → 21,089No
Lemhi, IdahoNonmetro23 → 0156No
Lewis, IdahoNonmetro23 → 083No
Nez Perce, IdahoMetro24 → 21,339No
Aitkin, MinnesotaNonmetro25 → 0521Yes, from $48
Carlton, MinnesotaMetro13 → 0394Yes, from $48
Chippewa, MinnesotaNonmetro59 → 01,159Yes, from $53
Cook, MinnesotaNonmetro14 → 083Yes, from $48
Crow Wing, MinnesotaNonmetro59 → 010,861No
Goodhue, MinnesotaNonmetro12 → 0328Yes, from $48
Koochiching, MinnesotaNonmetro14 → 0259Yes, from $48
Lake, MinnesotaNonmetro39 → 0381Yes, from $48
Lake of the Woods, MinnesotaNonmetro512 → 0632No
Mahnomen, MinnesotaNonmetro510 → 2379No
McLeod, MinnesotaNonmetro39 → 0887Yes, from $48
Meeker, MinnesotaNonmetro39 → 0459Yes, from $48
Mille Lacs, MinnesotaMetro38 → 0745Yes, from $48
Norman, MinnesotaNonmetro510 → 2610Yes, from $53
Pine, MinnesotaNonmetro12 → 0502Yes, from $48
Pipestone, MinnesotaNonmetro12 → 281Yes, from $48
Polk, MinnesotaMetro510 → 22,456No
Red Lake, MinnesotaNonmetro510 → 2545No
Rock, MinnesotaMetro12 → 2234Yes, from $48
Sibley, MinnesotaNonmetro37 → 0563Yes, from $48
Traverse, MinnesotaNonmetro26 → 245Yes, from $48
Wadena, MinnesotaNonmetro59 → 01,944No
Custer, MontanaNonmetro46 → 0347No
Hill, MontanaNonmetro46 → 0214No
McCone, MontanaNonmetro24 → 012No
Rock, NebraskaNonmetro45 → 010 or fewerYes, from $53
Sioux, NebraskaNonmetro33 → 012Yes, from $53
Adams, North DakotaNonmetro13 → 016Yes, from $53
Benson, North DakotaNonmetro27 → 064Yes, from $53
Billings, North DakotaNonmetro13 → 010 or fewerYes, from $53
Bottineau, North DakotaNonmetro13 → 075Yes, from $53
Bowman, North DakotaNonmetro13 → 017Yes, from $53
Burke, North DakotaNonmetro13 → 020Yes, from $53
Cavalier, North DakotaNonmetro13 → 028Yes, from $53
Divide, North DakotaNonmetro13 → 012Yes, from $53
Dunn, North DakotaNonmetro13 → 030Yes, from $53
Golden Valley, North DakotaNonmetro13 → 016Yes, from $53
Hettinger, North DakotaNonmetro13 → 031Yes, from $53
McKenzie, North DakotaNonmetro13 → 056Yes, from $53
Mountrail, North DakotaNonmetro27 → 0142Yes, from $53
Pierce, North DakotaNonmetro13 → 058Yes, from $53
Ramsey, North DakotaNonmetro39 → 2251Yes, from $53
Renville, North DakotaMetro13 → 047Yes, from $53
Rolette, North DakotaNonmetro13 → 047Yes, from $53
Slope, North DakotaNonmetro13 → 011Yes, from $53
Stark, North DakotaNonmetro13 → 0200Yes, from $53
Towner, North DakotaNonmetro13 → 020Yes, from $53
Ward, North DakotaMetro13 → 0608Yes, from $53
Williams, North DakotaNonmetro13 → 0370Yes, from $53
Beaver, OklahomaNonmetro57 → 093No
Cimarron, OklahomaNonmetro57 → 043No
Ellis, OklahomaNonmetro23 → 066No
Harmon, OklahomaNonmetro913 → 059No
Harper, OklahomaNonmetro23 → 038No
Roger Mills, OklahomaNonmetro57 → 076No
Texas, OklahomaNonmetro57 → 0311No
Brule, South DakotaNonmetro23 → 012Yes, from $53
Buffalo, South DakotaNonmetro23 → 010 or fewerYes, from $53
Edmunds, South DakotaNonmetro12 → 045Yes, from $53
Gregory, South DakotaNonmetro23 → 013Yes, from $53
Jerauld, South DakotaNonmetro35 → 013Yes, from $53
McPherson, South DakotaNonmetro12 → 014Yes, from $53
Wayne, UtahNonmetro11 → 0158No
Clallam, WashingtonNonmetro69 → 13,607No
Grays Harbor, WashingtonNonmetro37 → 42,670No

Download: county list (CSV)

Look up your county

Type a county to see what changes there for 2027. The map colors every county by what happens to its $0-premium plans; select a county on the map to see its numbers.

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What happens to $0-premium plans in each county, 2026 to 2027

Loses every $0 plan Fewer $0 plans No change More $0 plans No general-audience plans either year, or no data

Puerto Rico isn’t drawn; use the lookup. The same data is in the county CSV. Source: YourBestHealthPlans analysis of CMS CY2026 and CY2027 landscape files.

Who is affected

We matched each plan’s October 2026 enrollment, county by county, to CMS’s 2027 plan crosswalk, which says whether each plan renews, merges into another plan, shrinks its service area or ends. A person counts as affected if their plan ends, or if the plan it becomes isn’t sold in their county in 2027.

AreaCountiesLose every $0 planLose every planFewer plansPlans in the typical countyEnrollees in a plan that ends or leaves
Nonmetro1,8616763 1,351 (73%)22 → 18 615,000 of 3.1 million (19.9%)
Metro1,23874 877 (71%)33.5 → 30 2.2 million of 18.2 million (12.1%)

Metro = USDA 2023 Rural-Urban Continuum Codes 1–3; nonmetro = 4–9. Connecticut’s 8 counties have no 2023 code because USDA now uses its planning regions, so they’re left out of this table. Enrollment is CMS’s October 2026 count; CMS hides plan-county cells of 10 or fewer people, so these are slight undercounts.

Out-of-pocket caps are going up

Every Medicare Advantage plan has to cap what you pay for covered in-network care in a year. For 2027 CMS lets plans set that cap as high as $9,850, up from $9,250. A $0 premium doesn’t make a plan cheap in a bad year: the cap is the number to compare.

All general-audience plans20262027
Plans3,7533,553
$0-premium plans2,562 (68.3%)2,443 (68.8%)
Median in-network out-of-pocket cap$5,900$6,600
Highest cap CMS allows$9,250$9,850
Plans at the highest cap336 (9.0%)383 (10.8%)
Counties with a plan3,1053,040
Plans in the median county2624

Carrier exits and entries

Twelve parent organizations that sold general-audience Medicare Advantage plans in 2026 have none in the 2027 file. Four appear for the first time.

LeavingPlan brandPlans in 2026Counties in 2026
Group 1001Clear Spring Health6138
Molina Healthcare, Inc.Central Health Medicare Plan; ConnectiCare; Molina Healthcare of California; Molina Healthcare of Illinois1775
CHRISTUS HealthCHRISTUS Health Advantage844
Aspirus, Inc.Aspirus Health Plan221
Horizon Mutual Holdings, IncBraven Health1021
Providence St Joseph HealthProvidence Medicare Advantage Plans713
BMC Health System, Inc.WellSense Health Plan410
Elderplan, Inc.Elderplan28
Presbyterian Healthcare ServicesPresbyterian Health Plan48
Memorial Hermann Health SystemMemorial Hermann Health Plan26
Central Mass Health Holding LLCMass Advantage41
Sharp HealthcareSharp Health Plan41
EnteringPlan brandPlans in 2027Counties in 2027
Muscogee Creek NationNative Advantage111
St. Luke's Health System, Inc.St. Luke's Health Plan37
MultiCare Health SystemsMultiCare Health Plan Medicare Advantage Evergreen Plans23
MedCare Partners Holding, LLCMedCare Partners Health Plan of Texas11

Bigger carriers that stay are pulling back too. The largest changes in county footprint:

Parent organization (CMS)Counties 2026 → 2027Plans 2026 → 2027
Health Care Service Corporation948 → 450232 → 149
Centene Corporation1,731 → 1,387187 → 110
Blue Cross Blue Shield of Michigan Mutual Ins. Co.299 → 10658 → 43
UnitedHealth Group, Inc.2,597 → 2,457524 → 490
CVS Health Corporation2,083 → 1,960483 → 464
Humana Inc.2,655 → 2,598653 → 621
Elevance Health, Inc.1,030 → 974170 → 164
Blue Cross Blue Shield of Kansas51 → 65 → 4
Devoted Health, Inc.999 → 1,341241 → 407
Singh Holdings LLC71 → 1161 → 4
Lumeris Group Holdings Corporation72 → 9413 → 14

Counties here are counties where the parent sells at least one general-audience plan. The first 8 rows are the biggest losses, the last 3 the biggest gains.

Star ratings

CMS rates each Medicare Advantage contract from 1 to 5 stars on quality and member experience, and every plan under a contract shares its rating. The 2027 ratings, released in October 2026, are the ones shown during this enrollment period.

Medicare Advantage plans by overall star rating, 2026 vs. 2027

2026 ratings2027 ratings
04008001,2001,6002.0★: 3 plans in 20262.0★: 2 plans in 20272.0★2.5★: 43 plans in 20262.5★: 49 plans in 20272.5★3.0★: 405 plans in 20263.0★: 402 plans in 20273.0★3.5★: 949 plans in 20263.5★: 681 plans in 20273.5★4.0★: 937 plans in 20264.0★: 1,416 plans in 20274.0★4.5★: 1,132 plans in 20264.5★: 756 plans in 20274.5★5.0★: 109 plans in 20265.0★: 50 plans in 20275.0★Too new: 107 plans in 2026Too new: 140 plans in 2027Too newNo data: 68 plans in 2026No data: 57 plans in 2027No data

Number of general-audience plans. Source: CMS 2026 and 2027 Star Ratings data tables; CMS landscape files.

Star rating table
Overall ratingPlans 2026Plans 2027
2.0 stars3 (0.1%)2 (0.1%)
2.5 stars43 (1.1%)49 (1.4%)
3.0 stars405 (10.8%)402 (11.3%)
3.5 stars949 (25.3%)681 (19.2%)
4.0 stars937 (25.0%)1,416 (39.9%)
4.5 stars1,132 (30.2%)756 (21.3%)
5.0 stars109 (2.9%)50 (1.4%)
Plan too new to be measured107 (2.9%)140 (3.9%)
Not enough data68 (1.8%)57 (1.6%)

State by state

Plans are counted once per state they’re sold in. Median cap = median in-network maximum out-of-pocket across the state’s plans.

StatePlans 2026 → 2027$0 plans 2026 → 2027Counties losing every $0 planMedian cap 2026 → 2027At the max cap, 2027
Alabama 63 → 65 44 → 45 0 $5,900 → $6,500 9.2%
Arizona 84 → 90 73 → 80 0 $4,900 → $5,450 0%
Arkansas 56 → 54 43 → 45 0 $6,700 → $6,750 7.4%
California 272 → 259 185 → 176 0 $2,900 → $2,900 0.8%
Colorado 71 → 65 54 → 55 2 $5,400 → $6,050 4.6%
Connecticut 31 → 27 21 → 15 0 $6,750 → $7,150 14.8%
Delaware 24 → 24 17 → 15 0 $6,725 → $7,150 20.8%
District of Columbia 16 → 11 8 → 5 0 $6,750 → $7,150 0%
Florida 325 → 308 294 → 288 0 $3,900 → $4,200 1.3%
Georgia 107 → 99 84 → 80 0 $9,250 → $9,850 53.5%
Hawaii 35 → 37 18 → 19 0 $6,700 → $7,150 0%
Idaho 36 → 33 17 → 11 7 $6,250 → $6,700 0%
Illinois 124 → 106 96 → 81 0 $4,800 → $5,200 7.5%
Indiana 94 → 98 68 → 72 0 $5,900 → $6,750 15.3%
Iowa 45 → 41 28 → 25 0 $5,000 → $6,500 4.9%
Kansas 68 → 60 53 → 49 0 $5,000 → $5,500 5%
Kentucky 79 → 80 60 → 55 0 $6,500 → $6,925 11.3%
Louisiana 71 → 70 53 → 53 0 $4,900 → $6,300 4.3%
Maine 36 → 32 19 → 14 0 $6,775 → $7,150 12.5%
Maryland 38 → 30 16 → 14 0 $7,500 → $7,500 3.3%
Massachusetts 84 → 79 30 → 29 0 $5,000 → $6,000 6.3%
Michigan 148 → 131 68 → 63 0 $5,100 → $6,000 9.2%
Minnesota 55 → 40 19 → 14 22 $5,000 → $6,900 12.5%
Mississippi 49 → 51 39 → 40 0 $6,000 → $6,900 13.7%
Missouri 109 → 113 89 → 91 0 $4,500 → $5,500 2.7%
Montana 28 → 19 15 → 8 3 $6,600 → $6,750 0%
Nebraska 33 → 30 24 → 22 2 $5,000 → $7,000 3.3%
Nevada 64 → 58 56 → 49 0 $2,975 → $3,950 0%
New Hampshire 17 → 15 10 → 9 0 $6,550 → $7,150 6.7%
New Jersey 72 → 56 43 → 33 0 $8,875 → $9,750 50%
New Mexico 50 → 39 37 → 32 0 $4,900 → $5,900 2.6%
New York 147 → 145 62 → 59 0 $8,900 → $9,750 49.7%
North Carolina 122 → 120 88 → 96 0 $6,250 → $6,950 27.5%
North Dakota 15 → 12 7 → 5 22 $6,500 → $6,825 0%
Ohio 155 → 134 95 → 83 0 $5,300 → $5,900 2.2%
Oklahoma 56 → 52 41 → 37 7 $5,700 → $6,050 5.8%
Oregon 80 → 69 47 → 42 0 $6,250 → $7,100 2.9%
Pennsylvania 273 → 267 137 → 134 0 $6,600 → $7,100 10.1%
Puerto Rico 31 → 32 30 → 32 0 $3,400 → $3,400 0%
Rhode Island 14 → 13 9 → 7 0 $5,825 → $6,750 0%
South Carolina 69 → 68 50 → 51 0 $8,200 → $9,250 42.6%
South Dakota 13 → 15 6 → 5 6 $5,500 → $7,150 0%
Tennessee 93 → 105 64 → 75 0 $5,100 → $6,200 6.7%
Texas 272 → 228 220 → 183 0 $5,925 → $6,500 7%
Utah 38 → 33 28 → 24 1 $5,800 → $6,700 3%
Vermont 3 → 5 3 → 3 0 $6,500 → $7,150 20%
Virginia 103 → 106 70 → 78 0 $6,750 → $7,150 26.4%
Washington 89 → 71 52 → 43 2 $6,600 → $6,750 5.6%
West Virginia 55 → 51 35 → 30 0 $6,900 → $7,150 15.7%
Wisconsin 82 → 75 47 → 42 0 $5,000 → $5,500 2.7%
Wyoming 13 → 8 7 → 4 0 $6,750 → $7,075 12.5%

Download: every county (CSV) · state summary (CSV) · counties losing every $0 plan (CSV) · headline numbers (JSON)

Is your plan leaving? If your plan won’t be offered in 2027, it must send you a notice, and you get a Special Enrollment Period to pick a new plan. You can also switch during open enrollment, October 15 to December 7, 2026. Compare what’s left in your county in our state rankings or the Medicare Plan Finder. Free one-on-one help: your State Health Insurance Assistance Program.

Going back to Original Medicare? When your Medicare Advantage plan leaves your area, federal law gives you a guaranteed-issue right to buy certain Medigap policies without health questions, from 60 days before your plan coverage ends to 63 days after. Some states give more rights. Medigap guaranteed-issue rights by state.

How our numbers compare

Other analyses of the same CMS files count different things. Here’s how ours line up, so you can use them side by side.

MeasurePublishedOursWhy they differ
Medicare Advantage plans, 20265,553 (CMS)5,553 with Special Needs Plans; 3,753 withoutSame count. This study leaves out the 1,800 Special Needs Plans, which only some people can join.
Medicare Advantage plans, 2027about 5,532 (CMS)5,522 with Special Needs Plans; 3,553 withoutCMS gave an approximate figure; ours is counted from the 2027 landscape file.
Counties with no general-audience drug plan123 → 193 (KFF)63 → 133Same rise of 70. Ours covers only the 3,167 counties listed in the CMS file; KFF’s also covers counties with no plan of any kind, such as Alaska’s. The gap is the same 60 counties in both years.
Counties carriers leave and enter (drug plans)KFFIdentical for all six carriers belowHealth Care Service Corporation: 498 out, 0 in; UnitedHealth Group: 228 out, 9 in; Humana: 62 out, 4 in; Centene Corporation: 359 out, 15 in; CVS Health Corporation: 186 out, 63 in; Devoted Health: 0 out, 342 in.
Average premium$14.37 → $12.00 (CMS)Not computedCMS weights by projected enrollment and includes Special Needs Plans. We report the worst-case year instead.

CMS: Medicare Advantage and Medicare Prescription Drug Programs Expected to Remain Stable in 2027, September 28, 2026. KFF: Medicare Advantage Plan Availability Varies Widely by County for 2027, October 9, 2026. Both read October 18, 2026.

Methodology

Data. CMS Medicare Advantage and Prescription Drug Plan Landscape files for contract years 2026 (CY2026_Landscape_202609.csv, data last updated September 2, 2026) and 2027 (CY2027_Landscape_202609.csv, released September 2026, revised September 30, 2026). Star ratings: CMS 2026 Star Ratings data tables (summary ratings as revised July 22, 2026, which match the 2026 ratings in the landscape file) and 2027 Star Ratings data tables (October 8, 2026). Enrollment: CMS Monthly Enrollment by Contract/Plan/State/County, October 2026. Plan changes: CMS 2027 Part C and D Plan Crosswalk (October 1, 2026 file). Metro and nonmetro: USDA Economic Research Service 2023 Rural-Urban Continuum Codes.

Plans counted. General-audience Medicare Advantage plans with and without drug coverage (HMO, HMO-POS, PPO, regional PPO, PFFS and MSA). Special Needs Plans, Cost plans, PACE and employer group plans are excluded; employer plans are not in the landscape file. Each CMS contract-plan-segment ID is one plan. Nationwide counts are unique plans; state counts count a plan once in each state where it’s sold. Plans under CMS sanction are included because they appear in the file.

Definitions. A $0-premium plan has a combined monthly plan premium (Part C plus Part D) of $0; the Part B premium is still owed. A county “loses every $0 plan” if at least one $0-premium plan was offered there in 2026 and none is in 2027. Out-of-pocket cap is the in-network maximum out-of-pocket amount; plans “at the maximum” equal the CMS mandatory limit for that year ($9,250 for 2026, $9,850 for 2027). Carrier exits and entries compare parent organization names as CMS reports them; no parent organization that kept a contract changed its name between the files. Star bands use the contract’s overall rating. The worst-case year is 12 months of premiums plus the in-network out-of-pocket cap, the same measure our rankings use; for each county we take the lowest among plans with drug coverage, and the “typical county” is the median across the 3,032 counties with such a plan in both years. County counts cover the 3,107 counties with a general-audience plan in either year.

People affected. October 2026 enrollment in general-audience plans (no Special Needs Plans, employer plans, Cost plans or PACE), by plan and county. Each plan is followed through the 2027 crosswalk; a person counts as affected if the plan is terminated or if the plan it continues as has no 2027 segment in their county. “Starts charging a premium” compares the plan’s 2026 premium in the county with the lowest premium of its 2027 plan there. CMS hides cells of 10 or fewer people, so totals are slight undercounts; enrollees living outside their plan’s 2026 service area (usually people who moved) are left out.

Checks. Every number on this page is computed from the data when the site is built. The headline numbers were recomputed independently from the raw CMS CSV files and matched.

Limits. County counts are not weighted by population; the enrollment figures above are the people-weighted view. A $0 plan that leaves a county may be replaced by a plan with a small premium and a lower cap; this study counts plans and does not judge their value. Plans can still change before January 1. Check your plan’s Annual Notice of Change for its exact 2027 terms.

Cite or republish

Journalists, researchers and SHIP counselors are welcome to use these numbers and charts. Please credit and link to this page:

YourBestHealthPlans analysis of CMS CY2026 and CY2027 Medicare Advantage landscape files, https://yourbesthealthplans.com/medicare-advantage-2027-changes/

HTML credit line for an embed or chart:

<p>Source: <a href="https://yourbesthealthplans.com/medicare-advantage-2027-changes/">YourBestHealthPlans analysis of CMS Medicare Advantage landscape files, 2026&ndash;2027</a></p>

Data files: every county (CSV), state summary CSV, counties losing every $0 plan (CSV), headline numbers JSON. Questions or a specific county or carrier cut: contact the YourBest Editorial Team.

Sources

  1. CMS, CY 2026 and CY 2027 Medicare Advantage and Prescription Drug Plan Landscape files, cms.gov (accessed October 17, 2026).
  2. CMS, 2026 and 2027 Part C and D Star Ratings data tables, cms.gov (accessed October 17, 2026).
  3. CMS, CY 2026 MOOP and cost-sharing limit calculations, cms.gov; CMS, final CY 2027 Part C MOOP limits (Part C bid guidance). The highest in-network cap in each year’s landscape file matches: $9,250 and $9,850.
  4. CMS, Monthly Enrollment by Contract/Plan/State/County, October 2026, and 2027 Part C and D Plan Crosswalk, cms.gov (accessed October 18, 2026).
  5. USDA Economic Research Service, 2023 Rural-Urban Continuum Codes, ers.usda.gov (accessed October 18, 2026).
  6. County map shapes: U.S. Census Bureau cartographic boundaries via the us-atlas project.

Educational information, not a recommendation to join any plan. We are not an insurance agent or broker, and we are not connected with or endorsed by the U.S. government or the federal Medicare program. · Advertiser disclosure

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