The Largest US Physician Group Parents
The "Parent" organizations that manage these groups are now massive corporations. As of 2026, the top entities by physician count include:
The Permanente Medical Group (Kaiser Permanente): A physician-led model with over 17,000 doctors.
Optum (UnitedHealth Group): Now the largest employer of physicians in the US, with an arsenal exceeding 90,000 doctors.
HCA Healthcare: One of the nation's leading for-profit hospital operators with extensive physician group holdings.
Veteran's Health Administration: A massive government-run integrated system.
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