Path fx in neopltc dis, unsp hand, subs for fx w nonunion

This code signifies a fracture of an unspecified hand bone that occurred due to an underlying neoplastic (cancerous) process, and the fracture has failed to heal properly. The "K" in the seventh character indicates that this is a subsequent encounter for the fracture, specifically when nonunion is present.

Apply this code when a patient with a known malignancy presents for follow-up care of a hand fracture that is not healing as expected. Documentation should clearly state the presence of a pathological fracture, its location in the hand, the underlying neoplastic disease, and the diagnosis of nonunion.

• Ensure documentation specifies "nonunion" for the seventh character "K"; other healing statuses (e.g., routine, delayed, malunion) have different seventh characters.
• Always sequence the underlying neoplastic disease code first, as it is the etiology of the pathological fracture.
• Verify the specific hand bone involved if documented, as more specific codes exist for individual hand bones (e.g., M84.541-M84.548).