Health Plan Enrollment

Company

2008 Enrollment

UnitedHealth Group, Inc.

32,702,445

WellPoint, Inc.

30,622,381

Aetna, Inc.

16,318,625

Health Care Service Corporation

12,218,623

CIGNA HealthCare, Inc.

9,922,135

Kaiser Permanente

8,532,951

Humana, Inc.

8,486,913

Health Net, Inc.

6,180,395

Highmark, Inc.

5,182,186

Blue Cross Blue Shield of Michigan

5,011,359

Coventry Health Care, Inc.

4,762,000

EmblemHealth, Inc. (fka HIP Health Plan of NY)

4,035,710

Medical Mutual of Ohio

3,929,677

WellCare Group of Companies

3,537,777

Independence Blue Cross

3,480,168

Blue Shield of California

3,474,951

Horizon Blue Cross Blue Shield

3,149,279

CareFirst, Inc.

3,044,880

Blue Cross Blue Shield of Massachusetts

3,012,396

Blue Cross and Blue Shield of Alabama

2,971,869

BlueCross BlueShield of Tennessee

2,907,762

Blue Cross Blue Shield of North Carolina

2,789,587

Blue Cross and Blue Shield of Florida, Inc.

2,675,923

Regence Group, The

2,545,973

Blue Cross Blue Shield of Minnesota

2,483,968

*Includes medical enrollment in all models of fully insured and self-insured health plans; does not include specialty benefit enrollment.
**see AIS’s Directory of Health Plans: 2009 for complete listing.
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