Medicare Outpatient Observation Notice (MOON)

The Centers for Medicare & Medicaid Services (CMS) requires hospitals, including critical access hospitals (CAHs), to give written and verbal notice of receiving outpatient observation services of more than 24 hours to Medicare beneficiaries, including Medicare Advantage enrollees. All hospitals and CAHs must use the updated version of the Medicare Outpatient Observation Notice (MOON) (CMS-10611) no later than April 27, 2023. The notice is available for download.