Since the procedure was "cancelled due to contraindication," I would guess this was prior to Anesth? If so, I wouldn't imagine there'd be much of a bill for the CRNA/Ans Attending.
However, if anesth. had been administered, you would indicate an anesthesia code that would represent the most complex portion of the procedure completed and bill start/stop times, like normally. Your ICD would be where you'd indicate the contraindication. To my knowledge there is no modifier indicative of a discontinued anesthesia service.
Hope that helps.