ICD-10 Code L97.523 – Non-pressure chronic ulcer of other part of left foot with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.523 – Non-pressure chronic ulcer of other part of left foot with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on another part of the left foot, with necrosis extending into muscle. Use it when documentation specifies both the left foot location and muscle involvement.
Clinical signs
Typical findings include a persistent open wound on the left foot with devitalized tissue and deeper tissue loss. Clinical features vary; refer to documentation for evidence of muscle necrosis and exact ulcer site.
When to use this code
Use L97.523 when the record clearly states a chronic non-pressure ulcer on the left foot at a site other than heel or midfoot, and the ulcer involves necrosis of muscle. It is appropriate when the provider documents depth and laterality. Check documentation if the anatomic site is unclear.
Do not use for
Do not use this code for pressure ulcers or for ulcers on the heel, midfoot, ankle, or toes. Do not assign it if muscle necrosis is not documented.
Coding tip
Confirm the exact left-foot location and tissue depth before coding, because site and severity determine the correct L97 category.