AMBULATORY SURGERY CENTER (ASC)

Ambulatory surgery is surgery that does not require an overnight hospital stay. It is also called ‘Day Surgery’, ‘Same Day Surgery’ (SDS), or ‘Short Procedure Unit’ (SPU). ASC may either be affiliated with a hospital or have no affiliation with a hospital. Ambulatory Surgery Centers act as autonomous units and are treated as separate entities.

Ambulatory programs offer patients the convenience of being treated and released the same day without being admitted to the hospital. This means that eligible patients come to the hospital either in the morning or afternoon of the day of surgery, undergo the operation, and are discharged within the same day to recover in the comfort of their home.

Ambulatory surgery centers, or freestanding ambulatory centers, provide outpatient services. This day-care, or ambulatory technique provides an efficient and flexible approach to provision of many surgical and therapeutic procedures. It is a freestanding facility, other than a physician’s office, that operates exclusively to provide surgical services to patients who do not require hospitalization.

  AMBULATORY SURGICAL CENTER MODIFIERS

73   – Discontinued outpatient hospital/ambulatory surgery center (ASC) procedure prior to the administration of anesthesia
74   – Discontinued outpatient hospital/ambulatory surgery center (ASC) procedure after administration of anesthesia
SG   – Ambulatory Surgical Center (ASC) Facility service

CPT surgery Modifiers
CPT modifier 62 and 66
CPT Modifiers for Global period
CPT modifier 22 and 51

Ambulatory surgery center billing
ASC Modifier SG