ICD-10 Code L89.500 – Pressure ulcer of unspecified ankle, unstageable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.500 – Pressure ulcer of unspecified ankle, unstageable
What it is
This code identifies a pressure ulcer located on the ankle when the stage cannot be determined because the wound base is covered by slough or eschar. Use it for documentation that specifies the ankle but does not identify a laterality.
Clinical signs
Typical findings include a localized skin or tissue injury over the ankle, often with full-thickness loss that cannot be staged until the base is visible. Clinical features vary; refer to documentation.
When to use this code
Use L89.500 when the provider documents a pressure injury or pressure ulcer at the ankle and states it is unstageable. This is appropriate when necrotic tissue or eschar prevents staging, and the record does not specify right or left ankle. If laterality is documented, choose the more specific code.
Do not use for
Do not use this code for ulcers that are not pressure-related, or when the ankle side is documented and a more specific code is available. Check documentation if the wound stage is known or if the site is not the ankle.
Coding tip
Confirm both the pressure-ulcer diagnosis and the exact ankle location before assigning L89.500.