Path fx in oth disease, unsp ankle, subs for fx w delay heal

This code signifies a fracture of an unspecified ankle bone that occurred due to an underlying disease process, not from trauma. It indicates that the patient is in a subsequent phase of care for this fracture, specifically experiencing delayed healing.

Apply this code when documentation specifies a pathological fracture of an ankle, without identifying a specific ankle bone, and the patient is being treated for delayed union or nonunion. This is appropriate for follow-up encounters after initial treatment, where the fracture has not healed as expected.

• Requires documentation of an underlying disease causing the fracture (e.g., osteoporosis, neoplasm, Paget's disease).
• Always sequence the underlying disease code first, followed by this fracture code.
• Distinguish from traumatic fractures (S82.8- series) and stress fractures (M84.3- series).