ICD-10 Code L98.428 – Non-pressure chronic ulcer of back with other specified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.428 – Non-pressure chronic ulcer of back with other specified severity
What it is
This code identifies a chronic ulcer on the back that is not caused by pressure and has a documented severity level other than the standard stages. Use it when the record specifies a back ulcer and the exact severity is not otherwise classified.
Clinical signs
Findings typically include a persistent open skin lesion on the back with loss of tissue and delayed healing. Clinical features vary; refer to documentation for depth, drainage, or surrounding skin changes.
When to use this code
Use L98.428 when the clinician documents a chronic non-pressure ulcer on the back and notes an unspecified “other specified severity.” It is appropriate when the ulcer is not described as a pressure injury and the location is clearly the back. Check documentation if the depth or severity level is unclear.
Do not use for
Do not use this code for pressure ulcers, since those are coded in a different category. Do not use it if the lesion is an acute wound, abrasion, or another skin disorder without documentation of a chronic ulcer.
Coding tip
Verify both the anatomic site and the non-pressure nature of the ulcer before assigning this code.