ICD-10-CM > L00-L99 > L80-L99 > L89 > L89.9 > L89.94 L89.94 Pressure ulcer of unspecified site, stage 4 Billable/Specific Copy Code Copy Description Applicable To Healing pressure ulcer of unspecified site, stage 4Pressure ulcer with necrosis of soft tissues through to underlying muscle, tendon, or bone, unspecified site