ICD-10 Code L97.321 – Non-pressure chronic ulcer of left ankle limited to breakdown of skin (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.321 – Non-pressure chronic ulcer of left ankle limited to breakdown of skin
What it is
This code identifies a chronic ulcer on the left ankle caused by factors other than pressure, with skin breakdown limited to the epidermis or superficial dermis. It is used when the documentation specifies the left ankle location and superficial depth.
Clinical signs
Findings usually include a persistent open sore at the left ankle with superficial tissue loss and no deeper exposure. Clinical features vary; refer to documentation.
When to use this code
Use L97.321 when the record clearly states a non-pressure chronic ulcer of the left ankle and notes breakdown of skin only. You should also use it when the provider documents a chronic superficial ulcer at that site without deeper tissue involvement. Confirm laterality and depth before coding.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers at a different location. If the depth is not limited to skin or the site is not the left ankle, Check documentation.
Coding tip
Verify the ulcer’s cause, laterality, and depth together in the note before assigning L97.321.