ICD-10 Code L89.324 – Pressure ulcer of left buttock, stage 4 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.324 – Pressure ulcer of left buttock, stage 4
What it is
This code identifies a pressure ulcer on the left buttock that is stage 4. Stage 4 means full-thickness skin and tissue loss, with exposed deeper structures such as muscle, tendon, or bone.
Clinical signs
Typical findings include an open ulcer with deep tissue destruction and visible or palpable underlying structures. Clinical features vary; refer to documentation for wound depth, drainage, necrosis, and any tunneling or undermining.
When to use this code
Use this code when the record clearly documents a pressure ulcer on the left buttock and specifies stage 4. It may appear in inpatient, outpatient, or home health documentation when the wound is present on assessment. If laterality, site, or stage is unclear, check documentation before coding.
Do not use for
Do not use this code for pressure injuries at another body site, or for ulcers documented as stage 1, 2, 3, unstageable, or deep tissue pressure injury. Do not assign it if the note does not confirm both left buttock and stage 4.
Coding tip
Always verify the exact anatomic site and stage in the provider note; laterality and stage drive correct code selection.