ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.8 > L89.81 > L89.813 L89.813 Pressure ulcer of head, stage 3 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of head, stage 3Pressure ulcer with full thickness skin loss involving damage or necrosis of subcutaneous tissue, head