Inpatient Procedure
A surgical or medical procedure that requires hospital admission and an overnight stay due to complexity, risk, or recovery needs. Payer inpatient-only lists determine which procedures cannot be reimbursed if performed in an ambulatory surgery center.
What is an inpatient procedure?
An inpatient procedure is a surgical or medical procedure that requires hospital admission and an overnight stay because of its complexity, risk, or the recovery it demands. The need to admit the patient reflects a clinical judgment that the case cannot be safely managed on a same-day basis.
These procedures typically involve more extensive monitoring, longer recovery, or a greater likelihood of complications than outpatient cases. As a result, they remain anchored to the hospital setting.
Why do inpatient procedures matter for ASCs?
For ambulatory surgery centers, the boundary around inpatient procedures is set in part by payer inpatient-only lists, which designate procedures that will not be reimbursed if performed in an outpatient setting. A center that performs a listed procedure risks having the claim denied.
Knowing which procedures are classified as inpatient-only is therefore essential to scheduling and case selection. As payers periodically move procedures off these lists, surgery centers can take on cases that were previously hospital-only, making the list a key driver of what an ASC can perform.
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