ICD-10 Code L98.42 – Non-pressure chronic ulcer of back (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.42 – Non-pressure chronic ulcer of back
What it is
This code identifies a chronic skin ulcer on the back that is not caused by pressure. It describes a persistent open wound with skin breakdown in the back area.
Clinical signs
Typical findings include a non-healing ulcer, visible skin loss, and local wound changes such as drainage or exposed tissue. Clinical features vary; refer to documentation.
When to use this code
Use L98.42 when the record clearly documents a chronic ulcer located on the back and it is not a pressure injury. You should code it when the provider describes a long-standing open lesion, ulcer, or chronic skin breakdown in that area.
Do not assume the cause from appearance alone. Verify that the documentation supports a non-pressure etiology and that the site is the back.
Do not use for
Do not use this code for pressure ulcers, traumatic wounds, or ulcers on other body sites. Check documentation if the cause or location is unclear.
Coding tip
Confirm both the ulcer site and the non-pressure cause in the note before assigning L98.42.