ICD-10 Code L98.493 – Non-pressure chronic ulcer of skin of other sites with necrosis of muscle (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.493 – Non-pressure chronic ulcer of skin of other sites with necrosis of muscle
What it is
This code identifies a chronic, non-pressure ulcer on skin at a site other than the usual pressure areas, with necrosis extending into muscle. Use it when documentation clearly states ulceration with muscle involvement.
Clinical signs
Typical findings include a persistent open skin lesion, tissue breakdown, and visible or documented muscle necrosis. Clinical features vary; refer to documentation for the exact site and depth.
When to use this code
Use L98.493 when the provider documents a chronic ulcer at an “other site” and specifically notes necrosis of muscle. It applies when the ulcer is not a pressure ulcer and the record supports the depth of tissue loss. Check documentation if the site or depth is unclear.
Do not use for
Do not use this code for pressure ulcers or for ulcers without documented muscle necrosis. Do not assign it if the record only describes skin loss, fat exposure, or an unspecified ulcer depth.
Coding tip
Confirm both the non-pressure etiology and the muscle necrosis detail before coding.