ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.3 > L89.32 > L89.324 L89.324 Pressure ulcer of left buttock, stage 4 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of left buttock, stage 4Pressure ulcer with necrosis of soft tissues through to underlying muscle, tendon, or bone, left buttock