2027 open enrollment. 3.15M must pick a new plan.

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Vlada / Medicare Advantage / Oklahoma

Medicare Advantage plan exits 2027 in Oklahoma, by county

16,237 of Oklahoma's 315,509 Medicare Advantage members (5.1%) are in a plan that is not sold in their county for 2027, measured from the CMS 2027 Landscape and crosswalk against September 2026 enrollment. Nationally the share is 10.6%.

Period: plan year 2027 against September 2026 members · Updated 2026-10-19 · Next: CMS January 2027 enrollment (February 2027): where the members landed

members, Sept 2026
315,509
members, Sept 2026
must pick for 2027
16,237
must pick for 2027
share of members
5.1%
share of members
counties
77
counties

Members who must pick a new plan each year, 2016 to 2027

Members of individual Medicare Advantage plans in Oklahoma whose plan is not sold in their county the next year, by plan year; the share of all members at the top of each bar. Orange: the last three years.

04k8k12k16k0.2%20162.6%20179.8%20180.1%201911.7%20200.3%20210.8%20223.1%20230.5%20242.6%20251.5%20265.1%2027

Every Oklahoma county, 2027

Members in September 2026; those whose plan is not sold in their county for 2027; their share; of those, the members offered a new or renumbered plan by their own company in the county, and the members whose company sells no plan there for 2027. Sorted by members who must pick. Each county links to its own page: the plans that end, the companies, enrollment and penetration since 2015, the Stars.

CountyMembers, Sept 2026Must pick for 2027ShareOffered a new or renumbered planCompany gone
Creek9,2332,25124.4%072
Bryan3,42993027.1%020
Lincoln3,34789626.8%020
Marshall1,44283457.8%012
Tulsa61,1727911.3%0791
McCurtain2,07371634.5%00
Delaware5,12368513.4%058
Oklahoma59,6716591.1%0487
Carter3,88851913.3%086
Grady3,97248612.2%0138
Caddo1,99645422.7%035
Pontotoc2,45842117.1%031
Cleveland18,1304052.2%0176
Jackson1,13640435.6%044
Kay3,27238811.9%0148
Texas42131374.3%00
Nowata88431135.2%00
Love70229742.3%015
Pittsburg3,5872326.5%027
Johnston89222825.6%00
Canadian10,6012262.1%075
Woodward82422126.8%00
Choctaw1,31719715.0%00
Noble54519034.9%015
Okfuskee1,08217215.9%012
Osage4,3091633.8%066
Comanche7,2291592.2%0159
Blaine51315630.4%1725
Pottawatomie6,9231542.2%0154
Washington3,7581504.0%0150
Pawnee1,6321418.6%018
Garfield3,5031343.8%0134
Woods22811952.2%00
Hughes1,12711810.5%00
Beaver9393100.0%00
Stephens2,845913.2%00
Cherokee3,604902.5%090
Alfalfa1758850.3%00
Rogers9,243770.8%077
Roger Mills937681.7%00
Atoka926737.9%00
Wagoner8,401720.9%072
Logan3,789711.9%041
Ellis956669.5%00
Garvin2,447652.7%065
Major2226529.3%00
Jefferson3486418.4%00
Sequoyah4,696631.3%063
Muskogee6,324600.9%060
Harmon1096055.0%00
McClain3,403501.5%022
Le Flore4,922491.0%049
Okmulgee4,504451.0%045
Mayes4,397451.0%045
Grant1254536.0%00
Seminole2,546441.7%044
Cimarron4444100.0%00
Custer1,246413.3%041
Harper513874.5%00
McIntosh2,370341.4%034
Ottawa3,616290.8%029
Dewey1042726.0%00
Adair2,048221.1%022
Kiowa705192.7%019
Cotton304113.6%011
Payne2,47100.0%00
Craig1,49400.0%00
Haskell1,08400.0%00
Pushmataha1,04900.0%00
Beckham89800.0%00
Kingfisher83000.0%00
Latimer82900.0%00
Murray79000.0%00
Washita64000.0%00
Tillman54400.0%00
Coal39900.0%00
Greer26700.0%00
Oklahoma, 77 counties315,50916,2375.1%173,797

Download this table (CSV, CC BY 4.0) · cells under 11 members are suppressed by CMS and count as zero, so every count is a floor.

Oklahoma against the nation

MeasureOklahomaUnited States
Must pick a new plan for 202716,2373,153,512
Share of members5.1%10.6%
Share for 20261.5%10.1%

National figures: the Vlada report 3.15 million Medicare Advantage members must pick a new plan for 2027.

Star Ratings 2027, member-weighted

Measure20272026Change
Members in contracts rated 4+ stars80.9%68.2%+12.7 pts
Member-weighted average star4.023.96+0.06
Rated contracts24

Members by star, 2027: 5.0: 199 · 4.5: 80,848 · 4.0: 193,582 · 3.5: 61,185 · 3.0: 1,625 · 2.5: 2,053; 3,094 in unrated contracts. CMS Star Ratings released 2026-10-08, each contract's overall star weighted by its 2026-10 members in Oklahoma (individual and group); rating year 2027 pays in 2028.

By company, 2027

CMS parent organizations with members in Oklahoma in September 2026: members whose plan is not sold in their county for 2027, as a share of the company's own members; how the plan went (terminated, or its service area reduced so it continues elsewhere but not in their county); of those members, how many the company offers a new or renumbered plan of the same type in the county, and how many are left with no plan from the company there.

CompanyMembersMust pickShare of own membersPlan terminatedService area reducedOffered a new or renumbered planCompany gone
UnitedHealth Group, Inc.128,99611,4358.9%011,43500
Health Care Service Corporation6,0392,34938.9%1,42892101,739
Centene Corporation2,0582,058100.0%2,058002,058
Humana Inc.112,7343950.4%0395170
St Francis Health System & St John Health System35,86800.0%0000
MHH Healthcare, L.P.17,69800.0%0000
CVS Health Corporation9,04100.0%0000
Devoted Health, Inc.2,60800.0%0000
Mitchell Family Office46700.0%0000

Sources

  • CMS Medicare Advantage/Part D Landscape, plan year 2027: landscape_cy2027-landscape-202609-1.zip (CMS, September 2026).
  • CMS plan crosswalk, CY2027; CMS monthly enrollment by contract, plan and county, 2026-09.
  • CMS Star Ratings 2027, released 2026-10-08.
  • Page object written 2026-10-19; the series 2016 to 2027 from the locked exits history of the Vlada report (independent audit 2026-10-13).

Receipts: athena(table=medicare_semantic.exits_cells_county_2027_v1, block=counties) bce72deb8c12…; athena(table=medicare_semantic.exits_cells_county_2027_v1, block=companies) 15de170f7bb5…; get_stars_rollup(group_by=state, limit=60) 2c1fa6b01add…; file(path=docs/research/plan-exits-2027/data/audited/by_year_state.csv) b2f25ce9152e…. Suppressed cells (under 11 members) count as zero in every count.

Cite: Vlada Health (2026). Medicare Advantage plan exits 2027 in Oklahoma, by county. https://www.vladahealth.com/medicare-advantage/ok. Data: CC BY 4.0.

Method

  • Population: members of individual Medicare Advantage plans (H and R contracts, plans 001 to 799, special needs plans included; employer group, Cost, MMP and PACE excluded) in the county in September 2026.
  • Must pick: the CMS crosswalk names no successor plan sold in the member's county for 2027; members CMS moves to a successor in their county are not counted.
  • Company: CMS's reported parent organization in September 2026; a company's share is over its own members in the state.
  • Stars: each contract's overall star weighted by its members in Oklahoma; unrated contracts counted apart, never as zero stars.
  • Suppression: CMS hides cells under 11 members; they count as zero, so every count is a floor and every share is not.

The full method, with the national tables: How we counted, and how to check it.

Questions

How many Medicare Advantage members in Oklahoma must pick a new plan for 2027?
16,237 of 315,509 members (5.1%): their plan is not sold in their county for 2027 according to the CMS crosswalk and Landscape. Nationally the share is 10.6% (3,153,512 members).
Which Oklahoma county has the most members who must pick?
Creek County: 2,251 of 9,233 members (24.4%). 2 of the 77 counties lose 90% or more of their members' plans; 12 lose none.
Which company ended the most plans in Oklahoma for 2027?
UnitedHealth Group, Inc.: 11,435 of its 128,996 Oklahoma members (8.9%) are in a plan it does not sell in their county for 2027.
How did Oklahoma's Star Ratings change for 2027?
80.9% of members are in contracts rated 4 stars or more for 2027, against 68.2% the year before; the member-weighted average star is 4.02, from 3.96, over 24 rated contracts.
How does 2027 compare with 2026 in Oklahoma?
4,687 members (1.5%) had to pick a new plan for 2026; for 2027 it is 16,237 (5.1%), a change of +11,550 members.

Ask this in Claude or ChatGPT

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Use Vlada. Which Oklahoma counties have the most Medicare Advantage members who must pick a new plan for 2027? Give me a table with the members in the market, the members who lose their plan and the share, then the source file, the data vintage and the response hash.

Behind it: get_landscape_exits (transition_year 2026, group_by county, state OK) and get_stars_rollup (group_by state).