King of Prussia, Pa.-based Select Physical Therapy is the largest physician group based on the amount of its Medicare charges, which reach nearly $6 billion annually, according to Feb. 28 data from Definitive Healthcare.
There are more than 123,000 physician groups in the U.S., with the Panorama City-based Southern California Permanente Medical Group being the largest based on its number of physicians, according to Feb. 28 data from Definitive Healthcare.