Fortune's Fortune 500 tracks the highest-performing companies in the U.S. Here are the top healthcare companies by 2019 revenue:
1. UnitedHealth Group: $226.24 billion
2. McKesson: $208.36 billion
3. CVS Health: $194.58 billion
4. AmerisourceBergen: $167.94 billion
5. Cardinal Health: $136.81 billion
6. Anthem: $92.11 billion
7. Johnson & Johnson: $81.58 billion
8. Centene: $60.12 billion
9. Humana: $56.91 billion
10. Pfizer: $53.65 billion