ICD-10 Code L89.503 – Pressure ulcer of unspecified ankle, stage 3 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.503 – Pressure ulcer of unspecified ankle, stage 3
What it is
This code identifies a pressure ulcer located at the ankle when the laterality is not specified and the wound is documented as stage 3. Stage 3 means full-thickness skin loss with visible subcutaneous tissue.
Clinical signs
Expect an open ulcer over the ankle with full-thickness tissue loss and exposed fat, but not exposed bone, tendon, or muscle. Clinical features vary; refer to documentation.
When to use this code
Use L89.503 when the record clearly states a pressure ulcer of the ankle, stage 3, and does not specify right or left. You should also use it when the provider documents the site as ankle and the stage is confirmed in the note or wound assessment.
Do not use for
Do not use this code for stage 1, stage 2, unstageable, or deep tissue pressure injuries. Do not assign it if the ulcer is at a different foot or leg location, or if documentation is unclear.
Coding tip
Verify both the pressure injury stage and the unspecified ankle location before coding; if laterality is present, choose the more specific code.