Internet-Only Manual (IOM) Updates to Pub. 100-04, Chapter 12 for the New Hospital Inpatient or Observation Care Code Family, Nursing Facility Visits Code Family, Billing the Substantive Portion of a Split (or Shared) Visit, Changes for Prolonged Services, and Updates to the IOM with Policies Finalized for Office/Outpatient E/M Visits in the CY2020 and CY2021 Final Rules