ICD-10 Code L89.510 – Pressure ulcer of right ankle, unstageable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.510 – Pressure ulcer of right ankle, unstageable
What it is
This code identifies a pressure ulcer on the right ankle where the base cannot be seen because it is covered by slough, eschar, or other tissue. You use it when the ulcer is present, but its depth cannot yet be staged.
Clinical signs
Typical findings include localized skin breakdown over the right ankle with full-thickness tissue loss obscured by wound debris or necrosis. Clinical features vary; refer to documentation.
When to use this code
Use L89.510 when the provider documents a pressure ulcer of the right ankle as unstageable. This is appropriate when the wound’s true depth cannot be determined from the available exam. If later documentation identifies a stage, code the documented stage instead.
Do not use for
Do not use this code for a non-pressure wound, such as a venous or traumatic ulcer. Do not assign it if the ulcer stage is clearly documented or if the site is not the right ankle.
Coding tip
Check for laterality, exact site, and the word “unstageable” before coding.