Which health insurer dominates the market in each of the 50 states? Here is the name of each company, as well as its market share and number of enrollees.
The following information is from Kaiser Health Facts. The number of enrollees, rounded to the nearest whole number, reflects the number of people enrolled in 2011 for comprehensive major medical insurance.
Alabama
Blue Cross and Blue Shield of Alabama
92 percent market share
463,390 enrollees
Alaska
Premera Blue Cross
79 percent market share
37,980 enrollees
Arizona
UnitedHealth Group
39 percent market share
247,100 enrollees
Arkansas
Arkansas Blue Cross and Blue Shield
78 percent market share
169,650 enrollees
California
Kaiser Foundation Health Plan
42 percent market share
4,435,770 enrollees
Colorado
Kaiser Foundation Health Plan
47 percent market share
329,660 enrollees
Connecticut
WellPoint
38 percent market share
172,930 enrollees
Delaware
Highmark Blue Cross Blue Shield Delaware
71 percent market share
67,670 enrollees
District of Columbia
Aetna
29 percent market share
249,180 enrollees
Florida
Blue Cross and Blue Shield of Florida
42 percent market share
850,680 enrollees
Georgia
WellPoint
51 percent market share
458,630 enrollees
Hawaii
Hawaii Medical Service Association
62 percent market share
327,400 enrollees
Idaho
Blue Cross of Idaho
68 percent market share
155,800 enrollees
Illinois
Health Care Service Corp. [parent of Blue Cross and Blue Shield of Illinois]
68 percent market share
1,448,690 enrollees
Indiana
WellPoint
55 percent market share
205,190 enrollees
Iowa
Wellmark Blue Cross and Blue Shield
74 percent market share
275,020 enrollees
Kansas
Blue Cross and Blue Shield of Kansas
47 percent market share
206,010 enrollees
Kentucky
WellPoint
62 percent market share
229,198 enrollees
Louisiana
Blue Cross and Blue Shield of Louisiana
65 percent market share
214,790 enrollees
Maine
WellPoint
74 percent market share
144,320 enrollees
Maryland
CareFirst BlueCross BlueShield
62 percent market share
653,760 enrollees
Massachusetts
Blue Cross Blue Shield of Massachusetts
54 percent market share
715,170 enrollees
Michigan
Blue Cross Blue Shield of Michigan
52 percent market share
1,112,280 enrollees
Minnesota
HealthPartners
51 percent market share
392,210 enrollees
Mississippi
Blue Cross & Blue Shield of Mississippi
81 percent market share
149,160 enrollees
Missouri
WellPoint
33 percent market share
251,800 enrollees
Montana
Blue Cross and Blue Shield of Montana
66 percent market share
65,600 enrollees
Nebraska
Blue Cross and Blue Shield of Nebraska
86 percent market share
169,300 enrollees
Nevada
UnitedHealth Group
66 percent market share
258,660 enrollees
New Hampshire
WellPoint
55 percent market share
87,210 enrollees
New Jersey
Horizon Blue Cross Blue Shield of New Jersey
54 percent market share
592,630 enrollees
New Mexico
Health Care Service Corp. [parent of Blue Cross and Blue Shield of New Mexico]
40 percent market share
71,750 enrollees
New York
UnitedHealth Group
26 percent market share
1,732,190 enrollees
North Carolina
Blue Cross and Blue Shield of North Carolina
73 percent market share
419,180 enrollees
North Dakota
Noridian Mutual Insurance Co.
97 percent market share
137,750 enrollees
Ohio
WellPoint
42 percent market share
436,170 enrollees
Oklahoma
Health Care Service Corp. [parent of Blue Cross and Blue Shield of Oklahoma]
52 percent market share
247,800 enrollees
Oregon
Kaiser Foundation Health Plan
41 percent market share
281,650 enrollees
Pennsylvania
Highmark
32 percent market share
766,540 enrollees
Rhode Island
Blue Cross & Blue Shield of Rhode Island
74 percent market share
138,770 enrollees
South Carolina
BlueCross BlueShield of South Carolina
93 percent market share
335,350 enrollees
South Dakota
Wellmark Blue Cross and Blue Shield
56 percent market share
62,940 enrollees
Tennessee
BlueCross BlueShield of Tennessee
72 percent market share
334,750 enrollees
Texas
Health Care Service Corp. [parent of Blue Cross and Blue Shield of Texas]
46 percent market share
832,960 enrollees
Utah
SelectHealth [and affiliated companies]
49 percent market share
228,740 enrollees
Vermont
Blue Cross Blue Shield of Vermont
73 percent market share
53,680 enrollees
Virginia
WellPoint
52 percent market share
676,210 enrollees
Washington
Group Health Cooperative
33 percent market share
407,030 enrollees
West Virginia
Highmark
81 percent market share
112,430 enrollees
Wisconsin
UnitedHealth Group
16 percent market share
159,060 enrollees
Wyoming
Blue Cross Blue Shield of Wyoming
73 percent market share
25,800 enrollees
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