United Surgical Partners International has the largest market share by number of centers in the network. Here is the breakdown of the five companies cornering the market.
1. Dallas-based USPI, part of Tenet Healthcare: 8.1%
2. Deerfield, Ill.-based SCA Health, part of Optum: 5%
3. Nashville, Tenn.-based AmSurg: 3.9%
4. Nashville-based HCA Healthcare: 2.3%
5. Brentwood, Tenn.-based Surgery Partners: 2%