ICD-10 Code L89.120 – Pressure ulcer of left upper back, unstageable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.120 – Pressure ulcer of left upper back, unstageable
What it is
This code identifies a pressure ulcer on the left upper back whose depth cannot be determined because the wound base is obscured. Use it when the location is documented and the stage is unstageable.
Clinical signs
Typical findings include a localized skin or tissue injury over the left upper back with eschar or slough covering the base. Clinical features vary; refer to documentation.
When to use this code
Use L89.120 when the provider documents a pressure ulcer on the left upper back and states it is unstageable. This is appropriate when necrotic tissue or another covering prevents staging. If the site or stage is unclear, check documentation before coding.
Do not use for
Do not use this code for ulcers at another body site or for a pressure injury with a documented stage. Do not use it if the record does not support pressure-related etiology.
Coding tip
Confirm both the anatomic location and the word “unstageable” in the provider note before assigning this code.