Are observation codes submitted by the hour or by the calendar date?

Observation codes are for calendar dates. If your patient is admitted and discharged on the same date if service, submit the appropriate code from the CPT code Observation or Inpatient Care Services range 99234 to 99236. If your patient is admitted on one date and discharged on another, submit a CPT code Initial Observation Care code from 99218 to 99220 for the first date and code the discharge date with Observation Care Discharge CPT code 99217.


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