ICD-10 Code L97.823 – Non-pressure chronic ulcer of other part of left lower leg with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.823 – Non-pressure chronic ulcer of other part of left lower leg with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on the left lower leg, in a location other than the heel or ankle, with necrosis extending into muscle. Use it when the record clearly documents tissue breakdown and muscle involvement.
Clinical signs
Typical findings include a persistent open wound with nonhealing tissue loss, exposed or affected deeper structures, and documented muscle necrosis. Clinical features vary; refer to documentation.
When to use this code
Use L97.823 when the provider documents a chronic ulcer on the left lower leg and specifically states necrosis of muscle. It fits non-pressure ulcers caused by conditions such as vascular disease, diabetes, or other chronic causes when the site and depth are confirmed. If the depth is not stated, check documentation before assigning this code.
Do not use for
Do not use this code for pressure ulcers, ulcers of the heel or ankle, or ulcers without documented muscle necrosis. If the laterality, site, or depth is unclear, check documentation.
Coding tip
Code the ulcer’s location and depth exactly as documented; “other part of left lower leg” and “necrosis of muscle” must both be supported in the record.