Texas Subscriber
Answer: Location is not the most important factor when deciding whether to use an observation E/M code. The patient does not have to be in a designated observation unit for you to use the codes.
When you code observation services, select from 99218-99220 (Initial observation care, per day, for the evaluation and management of a patient -) for new or established patients.
Remember it this way: Observation is a status, not a location where the service occurs.