Here are the five largest ASC chains by number of affiliated physicians, based on the most recent information available:
1. USPI (Dallas): 11,000+ physicians
2. SCA Health (Deerfield, Ill.): 9,200+ physicians
3. Surgery Partners (Brentwood, Tenn.): 4,000+ physicians
4. HCA Surgery Ventures (Nashville, Tenn.): 3,400+ physicians
5. AmSurg (Nashville): 2,000+ physicians
