ICD-10 Code L98.429 – Non-pressure chronic ulcer of back with unspecified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.429 – Non-pressure chronic ulcer of back with unspecified severity
What it is
This code identifies a chronic skin ulcer on the back that is not caused by pressure and whose severity is not documented. Use it when the record confirms a non-pressure ulcer but does not specify depth or other severity details.
Clinical signs
Typical findings include a persistent open sore on the back, often with drainage, granulation, or surrounding skin breakdown. Clinical features vary; refer to documentation.
When to use this code
Use L98.429 when the provider documents a chronic non-pressure ulcer on the back and does not state the severity. It fits cases where the site is the back and the ulcer is clearly described as non-pressure. If the record later specifies depth or stage, code to the documented detail instead.
Do not use for
Do not use this code for pressure ulcers, traumatic wounds, or ulcers at other body sites. Check documentation if the note does not clearly identify the ulcer as chronic and non-pressure.
Coding tip
Verify both the anatomic site and that “non-pressure” is documented before assigning L98.429.