ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.5 > L89.52 > L89.523 L89.523 Pressure ulcer of left ankle, stage 3 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of left ankle, stage 3Pressure ulcer with full thickness skin loss involving damage or necrosis of subcutaneous tissue, left ankle