Pathological fracture, left ulna, subs for fx w nonunion

This code signifies a fracture of the left ulna that occurred due to an underlying disease process, not trauma, and has failed to heal properly. The patient is currently receiving routine care during the healing phase for this nonunion.

Apply this code when a patient presents for follow-up treatment, cast changes, or medication adjustments for a pathological fracture of the left ulna that has not united. Documentation should clearly state "pathological fracture," specify the left ulna, and indicate "nonunion" with the encounter being for subsequent care.

• Ensure documentation explicitly states "pathological fracture" and not a traumatic fracture.
• Verify the laterality (left ulna) is clearly documented.
• This "K" seventh character indicates subsequent care for a nonunion; do not use for initial treatment or routine healing.