Pressure ulcer of unspecified ankle, unstageable

This code signifies a pressure ulcer located on an unspecified ankle where the full extent of tissue damage cannot be determined because the wound base is obscured by slough or eschar. It indicates a severe pressure injury where the depth of tissue loss is unknown.

Apply this code when documentation clearly states a pressure ulcer on the ankle, and the clinician has identified it as "unstageable" due to the presence of non-viable tissue (slough or eschar) covering the wound bed. This code is appropriate when debridement is required to determine the true stage of the ulcer.

• Always sequence this code as a primary diagnosis when the pressure ulcer is the reason for the encounter.
• Do not use this code if the wound can be staged (e.g., Stage 1, 2, 3, 4, or deep tissue injury).
• Ensure documentation specifies "unspecified ankle" if the laterality (left/right) is not documented.