ICD-10 Code L98.A399 – Non-pressure chronic ulcer of unspecified hand with unspecified severity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L98.A399 – Non-pressure chronic ulcer of unspecified hand with unspecified severity
What it is
This code identifies a chronic, non-pressure ulcer located on an unspecified hand when the severity is not documented. Use it when the record confirms a persistent skin breakdown of the hand but gives no more detail.
Clinical signs
Typical findings include an open sore on the hand that does not heal normally and may show drainage, crusting, or surrounding skin irritation. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents a chronic ulcer of the hand and does not specify the exact hand side or ulcer severity. It is appropriate when the note clearly supports a non-pressure chronic ulcer but lacks the detail needed for a more specific code. Check documentation if the ulcer is pressure-related or if another diagnosis better explains the lesion.
Do not use for
Do not use this code for pressure ulcers, acute wounds, or skin lesions without documentation of chronic ulceration. If the site, laterality, or severity is known, code the more specific documented option instead.
Coding tip
Before assigning L98.A399, verify that the ulcer is documented as chronic, non-pressure, and on the hand, with no further detail available.