Non-prs chr ulcer of unsp ankl with msl invl w/o evd of necr

This code signifies a persistent open sore on an unspecified ankle that is not caused by pressure. The ulceration extends into the muscle tissue, but there is no indication of dead tissue (necrosis) present within the wound. This condition often arises from underlying vascular insufficiency, neuropathy, or trauma.

Apply this code when documentation clearly indicates a chronic, non-pressure ulcer located on an unspecified ankle, with the depth of the ulcer reaching the muscle layer. The medical record must explicitly state the absence of necrosis. This code is appropriate for ulcers that are long-standing and not healing spontaneously.

• Ensure documentation specifies "non-pressure" to differentiate from pressure ulcers.
• Verify the depth of the ulceration is explicitly stated as involving "muscle" and not just skin or subcutaneous tissue.
• Confirm the absence of necrosis; if necrosis is present, a different code reflecting that severity would be required.