Path fx in oth disease, l ulna, subs for fx w delay heal

This code signifies a fracture of the left ulna that occurred due to an underlying disease process, not from normal trauma. The fracture is currently in a phase of delayed healing, meaning it is taking longer than expected to mend. This code is used for follow-up care after the initial treatment of the fracture.

Use this code for patients presenting for ongoing management of a left ulnar pathological fracture where healing is progressing slower than anticipated. Documentation should clearly state the underlying disease causing the fracture, the anatomical site (left ulna), and the delayed healing status during a subsequent encounter.

• Ensure documentation specifies "pathological fracture" and the underlying disease.
• Verify the encounter type is "subsequent" and healing is explicitly noted as "delayed."
• Differentiate from nonunion (M84.4-) or malunion (M84.3-) which have separate codes.