Question: I have a cosmetic case that canceled after the pre-op exam but before induction. Do I bill an evaluation and management (E/M) code or the time? The anesthesiologist says that no E/M code is needed because it is self-pay. I’m thinking that I should bill the E/M code because the surgery never started due to patient’s atrial fibrillation with uncontrolled rate. Are rules different for self-pay cases? Nevada Subscriber Answer: Discontinuation of anesthesia before drug administration would be an E/M regardless of patient status (insured versus non-insured). You cannot waive charges in a self-pay patient if you wouldn’t waive charges to an insured patient. The pre-op exam or pre-anesthesia assessment typically has sufficient information to assign an E/M code.