ICD-10 Code L98.A113 – Non-pressure chronic ulcer of right upper arm with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.A113 – Non-pressure chronic ulcer of right upper arm with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on the right upper arm with muscle necrosis. Use it when documentation shows a persistent skin break in that location and the ulcer extends to dead muscle tissue.
Clinical signs
Typical findings include an open wound that does not heal normally, localized tissue loss, and exposed or necrotic muscle. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a chronic ulcer of the right upper arm and specifies necrosis of muscle. It applies to non-pressure ulcers, not ulcers caused by pressure injury. Make sure the record clearly supports the site and depth.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or ulcers without documented muscle necrosis. Check documentation if the laterality, location, or tissue depth is unclear.
Coding tip
Confirm both the right upper arm site and muscle necrosis in the note before assigning L98.A113.