ICD-10 Code L98.434 – Non-pressure chronic ulcer of abdomen with necrosis of bone (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.434 – Non-pressure chronic ulcer of abdomen with necrosis of bone
What it is
This code identifies a chronic, non-pressure ulcer on the abdomen that extends to and involves necrosis of bone. Use it when documentation shows a persistent abdominal ulcer with bone death, not a pressure injury.
Clinical signs
Typical findings include an open abdominal wound with chronic tissue breakdown, exposed or affected bone, and documentation of bone necrosis. Clinical features vary; refer to documentation.
When to use this code
Use L98.434 when the provider documents a chronic ulcer of the abdomen and specifically states necrosis of bone. It is appropriate when the ulcer is non-pressure in origin, such as from chronic skin breakdown or another non-pressure cause. Code it only when the record supports bone involvement.
Do not use for
Do not use this code for pressure ulcers, surgical wounds, or acute abdominal skin breakdown without chronic ulceration. If bone necrosis is not documented, check documentation.
Coding tip
Confirm both the abdominal location and the phrase “with necrosis of bone” before assigning L98.434.