MedPAC's 2019 commission report to Congress outlined data on ASC characteristics, including what specialties are the most common.
The majority of ASCs billing Medicare in 2017 specialized in a single area. In 2017, 61 percent of ASCs were single-specialty and 40 percent were multispecialty.
The top ASC specialties:
1. Gastroenterology: 21 percent
2. Ophthalmology: 21 percent
3. Pain management: 8 percent
4. Dermatology: 4 percent
5. Urology: 3 percent
6. Podiatry: 2 percent
7. Orthopedics/musculoskeletal: 1 percent
8. Respiratory: 1 percent