ASC - Ambulatory Surgical Center Resources

About Ambulatory Surgical Centers (ASC)

For Medicare purposes, an ASC is a distinct entity that operates exclusively to furnish surgical services to patients who do not require hospitalization and in which the expected duration of services does not exceed 24 hours following admission. This definition applies to the ASC no matter who the payor is for the ASC’s services. Additionally, services to Medicare patients are not expected to require active medical monitoring at midnight on the day of the procedure when furnished in an ASC.

You must be certified as meeting the requirements for an ASC and enter into an agreement with the Centers for Medicare & Medicaid Services (CMS) to be eligible for Medicare payment. An ASC can be either:

An ASC operated by a hospital is not the same as a provider-based outpatient surgery department of a hospital. A provider-based outpatient department of a hospital, including an outpatient surgery department:


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