ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.9 > L89.91 L89.91 Pressure ulcer of unspecified site, stage 1 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of unspecified site, stage 1Pressure pre-ulcer skin changes limited to persistent focal edema, unspecified site