Initial hospital care – E&M codes (99221, 99222, 99223) used to report the first hospital inpatient encounter between the patient and admitting physician.
Subsequent inpatient care – E&M codes (99231, 99232, 99233) used to report subsequent hospital visits.
Hospital Discharge Day Management Services – E&M codes (99238, 99239) used to report the work performed to discharge a patient from an inpatient stay.
Admission and Discharge Same Day – E&M codes (99234 – 99236) used to report services for a patient who is admitted and discharged from an observation or inpatient stay on the same calendar date. Patient's stay must be a minimum of eight hours in order to bill these codes.