Displaced transverse fracture of shaft of unsp ulna, sequela

This code signifies a long-term complication or late effect stemming from a previously sustained fracture of the transverse shaft of the ulna, where the bone fragments were not in their normal anatomical alignment. The specific ulna (left or right) is not documented. This sequela could manifest as chronic pain, nonunion, malunion, or functional impairment related to the original injury.

Apply this code when documenting a condition that is a direct consequence of a past displaced transverse ulnar shaft fracture, and the acute phase of the fracture has concluded. This is appropriate for follow-up encounters addressing residual problems from the original injury, such as ongoing pain, deformity, or limited range of motion attributed to the healed or unhealed fracture.

• Always sequence this sequela code after the code for the specific manifestation of the sequela (e.g., M84.4x for nonunion).
• Ensure documentation clearly links the current condition to the previous displaced transverse ulnar shaft fracture.
• Avoid using this code for acute fracture care; it is exclusively for late effects.