ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.3 > L89.31 > L89.311 L89.311 Pressure ulcer of right buttock, stage 1 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of right buttock, stage 1Pressure pre-ulcer skin changes limited to persistent focal edema, right buttock