Pathological fracture, l humerus, subs for fx w delay heal

This code signifies a pathological fracture of the left humerus that is currently undergoing treatment, but healing is not progressing at the expected rate. A pathological fracture occurs due to a disease process weakening the bone, rather than from trauma alone. The "subsequent encounter" indicates the patient is receiving routine care during the healing phase.

Apply this code when a patient presents for follow-up care of a left humeral pathological fracture that has been identified as having delayed healing. Documentation should clearly state the presence of a pathological fracture, its location, and the physician's assessment of delayed healing during a subsequent visit. This code is appropriate for ongoing management, cast changes, or physical therapy related to the delayed healing.

• Requires a seventh character "G" for subsequent encounter with delayed healing.
• Always sequence this code after the underlying condition causing the pathological fracture (e.g., osteoporosis, neoplasm).
• Distinguish from nonunion (M84.422K) or malunion (M84.422P), which represent more severe healing complications.