Physicians Services Provided in an Ambulatory Surgical Center: Place of Service

Physicians/practitioners who perform services in an Ambulatory Surgical Center (ASC) should use POS code 24 (ASC). 

Special Note: Physicians/practitioners are not to use POS code 11 (office) for ASC based services unless the physician has an office at the same physical location of the ASC, which meets all other requirements for operating as a physician office at the same physical location as the ASC, including meeting the “distinct entity” criteria defined in the ASC State Operations Manual that precludes the ASC and an adjacent physician office from being open at the same time, and the physician service was actually performed in the office suite portion of the facility.

See Pub 100-07, Medicare State Operations Manual, Appendix L — Guidance for Surveyors: Ambulatory Surgical Centers (PDF) for a complete set of applicable ASC definitions, basic requirements, and conditions of coverage.