ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.1 > L89.12 > L89.121 L89.121 Pressure ulcer of left upper back, stage 1 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of left upper back, stage 1Pressure pre-ulcer skin changes limited to persistent focal edema, left upper back