ICD-10 Code L97.803 – Non-pressure chronic ulcer of other part of unspecified lower leg with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.803 – Non-pressure chronic ulcer of other part of unspecified lower leg with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on an unspecified lower leg location other than the ankle or heel, with necrosis of muscle. Use it when the record clearly documents tissue loss extending to muscle.
Clinical signs
Typical findings include a persistent open ulcer with exposed or necrotic muscle tissue and delayed healing. Clinical features vary; refer to documentation for the exact lower-leg site and depth.
When to use this code
Use this code when the provider documents a chronic ulcer of the lower leg, the site is not more specifically identified, and muscle necrosis is present. It also fits when the note states non-pressure ulcer and does not describe a pressure injury. Confirm laterality and location details if available.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers limited to skin or fat only. If the chart identifies a more specific lower-leg site or different tissue depth, check documentation.
Coding tip
Code the most specific ulcer site and depth documented; if the location is vague, this unspecified lower-leg option may be appropriate.