The cities with the least competitive Medicare Advantage markets | 2024

Most Medicare Advantage markets are highly concentrated, but in a handful of markets, one payer controls more than 70% of the MA landscape, according to the American Medical Association’s annual Competition in Health Insurance report. 

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The report, published Nov. 19, examines competition in commercial, individual and Medicare Advantage markets. 

In 91% of Medicare Advantage markets, one insurer controlled more than 30% of the market. In just 4% of markets, one insurer had a more than 70% market share. 

Here are the least competitive Medicare Advantage markets: 

Casper, Wyo. 
UnitedHealth Group: 92% 

Cheyenne, Wyo. 
UnitedHealth Group: 86% 

Napa, Calif.
Kaiser Permanente: 82% 

California-Lexington Park, Md. 
UnitedHealth Group: 85% 

Vallejo, Calif. 
Kaiser Permanente: 82% 

Dubuque, Iowa
Medical Associates: 79% 

Jefferson City, Mo. 
UnitedHealth Group: 77% 

Santa Rosa-Petaluma, Calif. 
Kaiser Permantente: 76% 

Salinas, Calif. 
Montage Health: 75% 

Wenatchee, Wash. 
Carle Health: 74% 

Chico, Calif. 
Elevance Health: 73% 

Columbia, Mo. 
UnitedHealth Group: 72% 

St. Joseph Mo.-Kan. 
UnitedHealth Group: 72% 

Great Falls, Mont. 
Humana: 71% 

Wilmington, N.C. 
Humana: 71% 

Logan, Utah-Idaho 
UnitedHealth Group: 70% 

Read the full report here. 

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