Question: The podiatrist documented that the patient has a stage 3 pressure ulcer in her left heel, with associated gangrene. How should I code this? Maine Subscriber Answer: You should always check for any associated gangrene when reporting pressure ulcers and code the associated gangrene first, according to ICD-10-CM. In this case, you would first report I96 (Gangrene, not elsewhere classified) for the associated gangrene, then L89.623 (Pressure ulcer of left heel, stage 3) for the pressure ulcer.