ICD-10 Code L97.924 – Non-pressure chronic ulcer of unspecified part of left lower leg with necrosis of bone (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.924 – Non-pressure chronic ulcer of unspecified part of left lower leg with necrosis of bone
What it is
This code identifies a chronic, non-pressure ulcer on the left lower leg with bone necrosis. It is used when the ulcer is not caused by pressure and documentation specifies necrosis of bone.
Clinical signs
Expect a persistent open wound on the left lower leg with exposed or necrotic bone documented by the clinician. Clinical features vary; refer to documentation for depth, drainage, infection, or surrounding tissue changes.
When to use this code
Use this code when the record clearly states a chronic ulcer of the left lower leg and specifically notes necrosis of bone. You should apply it for non-pressure ulcers only, such as vascular or other chronic ulcers, when the site and severity are documented.
If the note does not confirm bone necrosis, or if the ulcer location is different, check documentation before coding. The code depends on accurate laterality and anatomical site.
Do not use for
Do not use this code for pressure ulcers, ulcers of the foot or ankle, or ulcers without documented bone necrosis. Check documentation if the record only says “ulcer” or does not specify the left lower leg.
Coding tip
Verify both laterality and the phrase “necrosis of bone” in the provider note before assigning L97.924.