Blue Cross Blue Shield companies have the largest market share among commercial insurers in the majority of states, according to the American Medical Association's annual "Competition in Health Insurance" report.
The report, published Nov. 19, found that 95% of metropolitan areas have "highly concentrated" commercial health insurance markets.
In 11 states, one insurer controlled more than half of the commercial insurance market.
Here is the largest insurer in commercial and exchange markets in every state:
Alabama
Blue Cross Blue Shield of Alabama
Market share: 86%
Alaska
Premera Blue Cross
Market share: 46%
Arizona
UnitedHealth Group
Market share: 28%
Arkansas
Blue Cross Blue Shield of Arkansas
Market share: 45%
California
Kaiser Permanente
Market share: 37%
Colorado
UnitedHealth Group
Market share: 24%
Connecticut
Elevance Health
Market share: 37%
Delaware
Highmark Blue Cross Blue Shield
Market share: 56%
District of Columbia
CareFirst Blue Cross Blue Shield
Market share: 22%
Florida
Florida Blue
Market share: 36%
Georgia
Elevance Health
Market share: 33%
Hawaii
Hawaii Medical Service Association (Blue Cross Blue Shield)
Market share: 63%
Idaho
Blue Cross of Idaho
Market share: 42%
Illinois
Health Care Service Corp.
Market share: 63%
Indiana
Elevance Health
Market share: 56%
Iowa
Wellmark Blue Cross Blue Shield
Market share: 47%
Kansas
Blue Cross Blue Shield of Kansas
Market share: 45%
Kentucky
Elevance Health
Market share: 67%
Louisiana
Louisiana Blue
Market share: 66%
Maine
Elevance Health
Market share: 43%
Maryland
CareFirst BlueCross BlueShield
Market share: 43%
Massachusetts
Blue Cross Blue Shield of Massachusetts
Market share: 35%
Michigan
Blue Cross Blue Shield of Michigan
Market share: 67%
Minnesota
Blue Cross Blue Shield of Minnesota
Market share: 38%
Mississippi
Blue Cross Blue Shield of Mississippi
Market share: 50%
Missouri
Elevance Health
Market share: 29%
Montana
Health Care Service Corp.
Market share: 50%
Nebraska
Blue Cross Blue Shield of Nebraska
Market share: 45%
Nevada
UnitedHealth Group
Market share: 36%
New Hampshire
Elevance Health
Market share: 48%
New Jersey
Horizon Blue Cross Blue Shield
Market share: 39%
New Mexico
Health Care Service Corp.
Market share: 48%
New York
UnitedHealth Group
Market share: 26%
North Carolina
Blue Cross Blue Shield of North Carolina
Market share: 48%
North Dakota
Blue Cross Blue Shield of North Dakota
Market share: 48%
Ohio
Elevance Health
Market share: 31%
Oklahoma
Health Care Service Corp.
Market share: 57%
Oregon
Cambia Health Solutions (Regence BlueCross BlueShield)
Market share: 21%
Pennsylvania
Highmark Blue Cross Blue Shield
Market share: 31%
Rhode Island
Blue Cross Blue Shield of Rhode Island
Market share: 42%
South Carolina
Blue Cross Blue Shield of South Carolina
Market share: 59%
South Dakota
Avera Health
Market share: 33%
Tennessee
Blue Cross Blue Shield of Tennessee
Market share: 42%
Texas
Health Care Service Corp.
Market share: 44%
Utah
Intermountain Health (Select Health)
Market Share: 46%
Vermont
Blue Cross Blue Shield of Vermont
Market share: 57%
Virginia
Elevance Health
Market share: 43%
Washington
Kaiser Permanente
Market share: 21%
West Virginia
Highmark Blue Cross Blue Shield
Market share: 52%
Wisconsin
UnitedHealth Group
Market share: 27%
Wyoming
Cigna
Market share: 40%
Read the full report here.