How Health Plans Stack Up, Dollar- and Membership-Wise

Since American Medical News was kind enough to compile the data (subscription required), I thought I'd offer up this quick pair of tables on the nation's largest nonprofit and for-profit health insurers. These accompanied an article about the proposed merger of the Blues plans Highmark and Independence Blue Cross, and so treats them as a single entity.

Largest nonprofit health plans, by membership (2007)

Health Care Service Corp. (owns four Blues plans)	12.1 million
Kaiser Permanente	8.6 million
Highmark-IBC	7 million
BlueCross BlueShield of Florida	4.2 million
Blue Shield of California	3.2 million

Largest for-profit and nonprofit insurers, by annual revenue (2007)

UnitedHealth Group	$75.4 billion
WellPoint	$61.1 billion
Kaiser Permanente	$37.8 billion
Aetna	$27.6 billion
Humana	$25.3 billion
Highmark-IBC	$22 billion
Cigna	$17.6 billion
Health Care Service Corp.	$14.4 billion
HealthNet	$14.1 billion
Coventry	$9.8 billion