The Ambulatory Surgery Center (ASC)
$6,000 for a Procedure That Costs $15,000 at the Hospital
Same surgeon. Same procedure. Same anesthesiologist. Same outcome. But when a knee arthroscopy happens at an ASC instead of a hospital outpatient department, the total cost drops by 40–60%.
What It Is
About 6,100 Medicare-certified ASCs perform same-day surgical procedures — orthopedic, ophthalmologic, GI, pain management, and increasingly cardiac and spine. No overnight stays.
Why It Exists
Hospital outpatient departments carry enormous overhead: a sprawling campus, 24/7 staffing, emergency capabilities, teaching infrastructure. ASCs strip all that away. Purpose-built facilities with focused operations, lower overhead, and faster throughput. CMS actively shifts procedures to ASCs to reduce total spending.
The Tradeoffs
The upside: Dramatically lower cost. Higher patient satisfaction. CMS is expanding the ASC-approved procedure list every year.
The downside: Cherry-picks healthy patients. Can’t handle complications requiring overnight stays. Creates revenue tension with hospitals.
The Bottom Line
ASCs are the clearest example of site-of-service economics in healthcare. The same procedure costs dramatically less when you remove the hospital’s overhead. This is one of the few areas where the policy direction is unambiguous: CMS wants more care in ASCs.