ICD-10 Code L97.504 – Non-pressure chronic ulcer of other part of unspecified foot with necrosis of bone (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L97.504 – Non-pressure chronic ulcer of other part of unspecified foot with necrosis of bone
What it is
This code identifies a chronic, non-pressure ulcer on another part of an unspecified foot, with bone necrosis. Use it when the record shows a persistent foot ulcer and the bone beneath the ulcer is dead or devitalized.
Clinical signs
Typical findings include a non-healing foot wound with exposed or affected bone, drainage, and local tissue breakdown. Clinical features vary; refer to documentation for the exact ulcer location and confirmation of necrosis of bone.
When to use this code
Use this code when the provider documents a chronic ulcer on the foot, not due to pressure, and specifies necrosis of bone. It applies when the site is another part of the foot and the foot is not otherwise specified. If laterality or a more exact site is documented, code that more specific option instead.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers without bone necrosis. Check documentation if the ulcer site is a different foot location or if laterality is known.
Coding tip
Verify that both chronic ulcer and bone necrosis are documented before assigning L97.504.