Pathological fracture in other disease, left ulna, sequela

This code signifies a pathological fracture of the left ulna that occurred due to an underlying disease process, and the patient is now experiencing a long-term complication or late effect of that fracture. This indicates that the initial fracture event has resolved, but residual issues related to it persist.

Use this code when documentation clearly indicates a healed or resolving pathological fracture of the left ulna, and the patient is being treated for a sequela (e.g., malunion, nonunion, chronic pain, deformity) directly attributable to that past fracture. The medical record should specify the left ulna and the pathological nature of the original fracture, as well as the ongoing sequela.

• Always sequence this code after the code for the specific sequela being treated (e.g., M84.4xx for malunion).
• Ensure the documentation specifies "pathological fracture" and not a traumatic fracture, as different code categories apply.
• Verify the laterality (left ulna) is explicitly stated in the clinical notes to support this specific code.