ICD-10 Code L98.433 – Non-pressure chronic ulcer of abdomen with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.433 – Non-pressure chronic ulcer of abdomen with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on the abdomen that extends through skin and subcutaneous tissue with necrosis of muscle. Use it when documentation clearly states abdominal ulceration with muscle necrosis.
Clinical signs
Typical findings include an open abdominal wound with persistent tissue breakdown and documented muscle involvement. Clinical features vary; refer to documentation for depth, location, and whether necrosis is present.
When to use this code
Use L98.433 when the provider documents a chronic abdominal ulcer and specifies necrosis of muscle. This applies to non-pressure ulcers, not pressure injuries, and the record should support the abdominal site and tissue depth. If the note is vague, check documentation before coding.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers at other body sites. If muscle necrosis is not documented, select the code that matches the documented depth instead.
Coding tip
Verify the ulcer is chronic, non-pressure, abdominal, and explicitly documented with muscle necrosis before assigning L98.433.