The following information appeared on, cms.gov
Since the beginning of the OPPS, CMS has maintained the Inpatient Only (IPO) list, which is a list of services that, due to their medical complexity, Medicare will only pay for when performed in the inpatient setting. In the CY 2021 OPPS/ASC final rule, CMS finalized a policy to eliminate the IPO list over a three-year period, removing 298 services from the IPO list in the first phase of the elimination.
