This educational content was developed through a thoughtful and deliberate consensus process by the technical expert panel (TEP) of the American College of Physician Advisors (ACPA) known as the Observation Subcommittee. Every attempt has been made to ensure the accuracy and reliability of the information provided at the time of publication, however, the information is provided “as is” without liability or warranty of any kind. These materials are not intended to be used in lieu of clinical practice, utilization management, or denial management institutional policies or guidelines, nor are they meant to supersede the individual clinical provider’s judgment.