ICD-10 Code L89.310 – Pressure ulcer of right buttock, unstageable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.310 – Pressure ulcer of right buttock, unstageable
What it is
This code identifies a pressure ulcer on the right buttock whose true depth cannot be determined because the wound bed is covered by slough or eschar. Use it when the ulcer is clearly documented as unstageable.
Clinical signs
Typical findings include localized skin breakdown over the right buttock with full-thickness tissue loss obscured by yellow, tan, brown, or black necrotic tissue. Clinical features vary; refer to documentation.
When to use this code
Use L89.310 when the provider documents an unstageable pressure ulcer specifically on the right buttock. The record should show pressure-related injury and indicate that staging cannot be assigned because the wound base is not visible. If later documentation reveals a stage, update coding accordingly.
Do not use for
Do not use this code for pressure injuries at another site or for ulcers that are staged as stage 1, 2, 3, or 4. Check documentation if the wound is described as nonpressure, traumatic, or unspecified.
Coding tip
Confirm both the anatomic site and the unstageable designation before assigning L89.310.