I'm in Colorado and my MAC is Trailblazer. I am still confused as to when you can use the 99211. I understand a physician has to see the patient prior to ancillary staff seeing the patient therafter (incident to seeing the physician), and if it's face to face, and if there are no other CPT code to use (say for irrigating an ear when the physician has previously seen the patient for this condition). What are the other circumstances then? We don't use it for any labs or screens? When should we use it?