An ASC is an occupancy that provides services or treatment to 4 or more patients that does one of two things:
- renders patients incapable of self-preservation
- provides outpatient surgical treatment requiring general anesthesia
Reference NFPA 101 The Life Safety Code (2012) 3.3.188.1 and NFPA 99 Health Care Facilities Code (2012) 3.3.6 for the official definition.