ICD-10 Code L97.923 – Non-pressure chronic ulcer of unspecified part of left lower leg with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.923 – Non-pressure chronic ulcer of unspecified 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, with tissue loss extending to muscle necrosis. Use it when the record clearly states the ulcer is non-pressure and located on an unspecified part of the left lower leg.
Clinical signs
Typical documentation includes a persistent open wound with necrotic muscle involvement and delayed healing. Clinical features vary; refer to documentation for the exact ulcer depth, location, and any associated infection or exposed tissue.
When to use this code
Use this code when the provider documents a chronic non-pressure ulcer of the left lower leg and specifies necrosis of muscle. It is appropriate when the site is not further described beyond “unspecified part” of the left lower leg. If the record is unclear, check documentation before assigning the code.
Do not use for
Do not use it for pressure ulcers, traumatic wounds, or ulcers on another leg or body site. Do not code it if muscle necrosis is not documented or if the ulcer depth is described differently.
Coding tip
Verify both laterality and tissue depth in the note; “left lower leg” and “necrosis of muscle” must both be documented.