ICD-10 Code L98.418 – Non-pressure chronic ulcer of buttock with other specified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.418 – Non-pressure chronic ulcer of buttock with other specified severity
What it is
This code identifies a chronic ulcer on the buttock that is not caused by pressure and is documented as having a specified severity other than the standard listed stages. Use it when the record clearly places the wound on the buttock.
Clinical signs
Clinical features vary; refer to documentation. You may see an open skin lesion with chronic tissue breakdown, drainage, or delayed healing, but the chart should specify the ulcer location and severity.
When to use this code
Use L98.418 when the provider documents a non-pressure chronic ulcer of the buttock and describes its severity as “other specified” rather than a named stage. It is appropriate for chronic wounds not due to pressure injury. Check documentation for laterality, depth, and any linked underlying condition.
Do not use for
Do not use this code for pressure ulcers, because those are coded in the pressure ulcer category. If the site is not the buttock or the severity is not documented, check documentation.
Coding tip
Confirm both the anatomic site and the exact severity wording in the note before assigning L98.418.