Largest Health Insurance Companies 2024 – Forbes Advisor - Forbes

Kaiser Permanente is the largest health insurance company in the U.S., followed by two Blue Cross Blue Shield companies (Elevance Health and HCSC), according to S&P Global Market Intelligence.

While some of these large health insurance companies are household names, others might seem obscure to the average consumer. Here is the list of the 50 largest health insurance companies in the U.S., and a deeper look at each of the top five.

50 Largest Health Insurance Companies in the U.S. Overall

sandoclr
Rank Health insurance company Market share Total health plan enrollment in 2021
1 Kaiser Permanente 12.81% 8,228,765
2 Elevance Health (Anthem) 7.27% 4,670,236
3 HCSC (including BCBS plans) 6.88% 4,419,293
4 UnitedHealth Group 6.70% 4,306,492
5 Centene Corp. 6.17% 3,962,897
6 CVS Health Corp. (Aetna) 4.01% 2,574,348
7 GuideWell (Florida Blue) 3.88% 2,491,019
8 Blue Cross Blue Shield of Michigan 2.08% 1,337,400
9 Highmark 1.61% 1,035,585
10 Blue Cross of North Carolina 1.40% 897,649
11 Humana 1.38% 887,612
12 Blue Cross and Blue Shield of Alabama 1.26% 810,745
13 Blue Cross Blue Shield of Massachusetts 1.24% 794,909
14 Molina Healthcare 1.21% 778,269
15 Independence Health Group 1.21% 774,155
16 CareFirst 1.20% 773,007
17 Tufts Health 1.14% 733,482
18 Horizon Blue Cross Blue Shield of New Jersey 1.07% 684,988
19 Bright Health 0.95% 609,981