Fortune's Fortune 500 tracks the largest companies in the world in terms of 2020 revenue.
Here are the 10 biggest healthcare companies, using Fortune's 2020 edition of its list:
1. CVS Health: $256.8 billion
2. UnitedHealth Group: $242.2 billion
3. McKesson: $214.3 billion
4. AmerisourceBergen: $179.6 billion
5. Cigna: $153.6 billion
6. Cardinal Health: $145.5 billion
7. Anthem: $104.2 billion
8. Johnson & Johnson: $82.1 billion
9. Centene: $74.6 billion
10. Humana: $64.9 billion