Hello. I recently started working for a surgeon. This is my first time coding for a physician that sees patients in a hospital setting. He is on call and sees patients in the ED, ICU, etc..I am often unclear on which place of service to choose for his E/Ms. He mostly does surgery consults. Sometimes the patient paperwork states they have been admitted, but they appear to still be in the ED. Is the POS automatically 21 after the patient is admitted or is it truly dependent on what part of the hospital the patient was seen (23)? Any help greatly appreciated.