Other disorders of continuity of bone, left ulna

This code signifies a disruption in the normal structure or integrity of the left ulna bone, excluding fractures or nonunion/malunion specifically coded elsewhere. It encompasses conditions like stress fractures, bone cysts, or other structural abnormalities that compromise the bone's continuity without being a complete break.

Use this code for documented conditions affecting the left ulna that are not explicitly classified as a fracture (traumatic or pathological) or a nonunion/malunion. Supporting documentation should clearly describe a structural defect or abnormality of the left ulna, such as a stress reaction, bone lesion, or other specified disorder impacting bone continuity.

• Ensure documentation specifies "left ulna" to justify laterality.
• Distinguish from acute fractures (S52.-) or nonunion/malunion (M84.3-, M84.4-).
• Always review the medical record for a more specific diagnosis before defaulting to this code.