The cities with the most competitive Medicare Advantage markets | 2023

Almost three-quarters of the nation's local Medicare Advantage markets are highly concentrated, according to the American Medical Association. 

The AMA's annual "Competition in Health Insurance" report, published in December, found that 71% of metropolitan areas have "highly concentrated" Medicare Advantage markets. In 90% of metropolitan areas, one payer has at least a 30% MA market share. In 31% of markets, one insurer had a share of 50% or more.

These are the metro areas where the largest Medicare Advantage payer controls less than 30 percent of the market:

Canton-Massillon, Ohio
UnitedHealth Group: 21% market share

Birmingham-Hoover, Ala.
UnitedHealth Group: 24% market share

Bangor, Maine
Martin's Point: 24% market share

Akron, Ohio:
UnitedHealth Group 24% market share

Glens Falls, N.Y.
Humana: 24% market share

Springfield, Mass.
Commonwealth Care Alliance: 25% market share

Worcester, Mass.-Conn.
Point32Health: 25% market share

Baltimore-Columbia-Towson, Md.
Kaiser: 26% market share

Yuma, Ariz.
Centene: 26% market share

Homosassa Springs, Fla.
Humana: 26% market share

Kokomo, Ind.
UnitedHealth Group: 26% market share

Cincinnati, Ohio-Ky.-Ind.
Humana: 26% market share

Cleveland-Elyria, Ohio
UnitedHealth Group: 26% market share

Binghamton, N.Y.
Excellus BCBS: 26% market share

Allentown-Bethlehem-Easton, Pa.-N.J.
Aetna: 26% market share

Memphis, Tenn.-Miss.-Ark.
Humana: 26% market share

Minneapolis-St. Paul-Bloomington, Minn.-Wis.
UCare: 27% market share

New York-Newark-Jersey City, N.Y.-N.J.-Pa.
UnitedHealth Group: 27% market share

Anniston-Oxford, Ala.
Viva Health: 27% market share

Clarksville, Tenn.-Ky.
Humana: 27% market share

Wheeling, W.V.-Ohio
Humana: 27% market share

Santa Fe, N.M.
UnitedHealth Group: 28% market share

Michigan City-La Porte, Ind.
Humana: 28% market share

Elmira, N.Y.
Excellus BCBS: 28% market share

Janesville-Beloit, Wis.
Aetna: 28% market share

Mansfield, Ohio
Aetna: 28% market share

Philadelphia-Camden-Wilmington, Pa.-N.J.-Del.-Md.
Aetna: 28% market share

Reading, Pa.
Aetna: 28% market share

Atlanta-Sandy Springs-Alpharetta, Ga.
Humana: 29% market share

Columbus, Ohio
Aetna: 29% market share

Youngstown-Warren-Boardman, Ohio-Pa.
Aetna: 29% market share

Portland-Vancouver-Hillsboro, Ore.-Wash.
Kaiser: 29% market share

Salem, Ore.
UnitedHealth Group: 29% market share

East Stroudsburg, Pa.
Aetna: 29% market share