Medicare Outpatient Observation Notice (MOON)

In the event any Medicare recipient has been in a status of outpatient observation for greater than 24 hours, Acute Hospitals are required to provide Medicare Members with a Medicare Outpatient Observation Notice (MOON). Medicare recipients must receive the MOON within 36 hours of admission to observation level of care

Please refer to the following website for further details on MOON requirements:

Document Catalog:

  1. MOON FAQs
  2. MOON Instruction Summary
  3. CMS Manual System 10611_Pub 100-04 Medicare Claims Processing MOON Instructions
  4. MOON Forms
  5. MOON Correspondence