ICD-10 Code L97.329 – Non-pressure chronic ulcer of left ankle with unspecified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.329 – Non-pressure chronic ulcer of left ankle with unspecified severity
What it is
This code identifies a chronic ulcer on the left ankle that is not caused by pressure and whose severity is not documented. Use it when the record confirms location and chronicity, but does not specify depth or tissue involvement.
Clinical signs
Typical findings include a persistent open sore at the left ankle with delayed healing, drainage, or surrounding skin changes. Clinical features vary; refer to documentation for ulcer depth, exposed structures, and any infection.
When to use this code
Use this code when the provider documents a chronic, non-pressure ulcer of the left ankle and does not state the severity. It also fits when laterality and site are clear, but the chart lacks enough detail for a more specific ulcer code. Check documentation if the wound is described only as a sore or skin breakdown.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers at another site. It is also incorrect if the record documents a more specific severity level or a different ankle laterality.
Coding tip
Query for ulcer depth and tissue involvement when the note says “chronic ulcer” but does not clearly support unspecified severity.