ICD-10 Code L97.804 – Non-pressure chronic ulcer of other part of unspecified lower leg with necrosis of bone (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.804 – Non-pressure chronic ulcer of other part of unspecified lower leg with necrosis of bone
What it is
This code describes a chronic, non-pressure ulcer on another part of an unspecified lower leg with bone necrosis. Use it when the record documents a long-standing skin breakdown that extends to or involves dead bone.
Clinical signs
Typical findings include an open ulcer with exposed or necrotic bone, persistent nonhealing tissue loss, and local signs of chronic wound disease. Clinical features vary; refer to documentation.
When to use this code
Use L97.804 when the provider clearly documents a non-pressure chronic ulcer of the lower leg and specifies necrosis of bone, but does not identify a more exact lower-leg site. It is appropriate for chronic wound encounters, follow-up care, and wound assessments. Check documentation if laterality or a more specific location is recorded elsewhere.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers without bone necrosis. Also avoid it if the chart identifies a more specific lower-leg site or a different ulcer type.
Coding tip
Verify that “necrosis of bone” is explicitly documented; if not, select the code that matches the documented ulcer depth.