ICD-10 Code L98.A293 – Non-pressure chronic ulcer of unspecified forearm with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.A293 – Non-pressure chronic ulcer of unspecified forearm with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on the forearm when the affected site is unspecified and the wound extends to necrosis of muscle. Use it for a long-standing skin breakdown not caused by pressure.
Clinical signs
Look for an open ulcer on the forearm with tissue loss and documented muscle necrosis. Clinical features vary; refer to documentation for depth, drainage, odor, and whether infection or exposed deeper structures are noted.
When to use this code
Use this code when the provider documents a chronic non-pressure ulcer of the forearm and specifies necrosis of muscle, but does not identify left or right side. It is appropriate when the record clearly supports chronicity and an unspecified forearm location.
If the note describes only skin breakdown or a lesser depth, choose a different ulcer code. Check documentation when the site, chronicity, or depth is unclear.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers without muscle necrosis. Do not assign it if the record specifies a different forearm side or a more severe depth.
Coding tip
Verify three elements in the note: non-pressure cause, chronic ulcer, and unspecified forearm with muscle necrosis.