ASC Surgical: CPT Codes Eligible for the Ambulatory Surgery Center

The codes in this category are ASC-eligible surgical procedures. In plain terms, these are surgical procedures that can be performed in a certified ambulatory surgery center. When a procedure is ASC-eligible, the surgery center has a clear path to scheduling it, and the surgeon bills separately for the professional component.

This list spans the high-volume surgery that defines outpatient care. You will find orthopedic work such as 27447 (total knee arthroplasty) and 29881 (knee arthroscopy with meniscectomy), ophthalmology such as 66984 (cataract extraction with lens insertion), and gastroenterology such as 45378 (diagnostic colonoscopy). Each individual code page below gives the short descriptor and the code's ASC-eligibility status.

For billers, the takeaway is straightforward. ASC-eligibility answers the site-of-service question, but it does not by itself answer whether a specific patient encounter will be approved. Medical necessity, the correct diagnosis pairing, site-of-service rules, and payer-specific prior authorization still apply, and commercial and government plans can set their own conditions. DataLily AI shows what commercial plans pay for these codes and which providers perform them most.