ICD-10 Code L97.521 – Non-pressure chronic ulcer of other part of left foot limited to breakdown of skin (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.521 – Non-pressure chronic ulcer of other part of left foot limited to breakdown of skin
What it is
This code identifies a chronic, non-pressure ulcer on another part of the left foot that is limited to skin breakdown. It means the wound is superficial and does not extend beyond the skin layer.
Clinical signs
Look for an open sore on the left foot with loss of the skin surface and no deeper tissue involvement. Clinical features vary; refer to documentation for ulcer location, chronicity, and depth.
When to use this code
Use L97.521 when the record clearly documents a chronic ulcer on the left foot, in a site other than the heel or toe, and specifies breakdown of skin only. You should also confirm that the ulcer is non-pressure in origin. If the note does not identify depth or exact location, check documentation.
Do not use for
Do not use this code for pressure ulcers, ulcers of the heel or toe, or wounds that extend into fat, muscle, or bone. Check documentation if the site or depth is unclear.
Coding tip
Verify both laterality and anatomic site, because “other part of left foot” is required for correct code assignment.