Displaced transverse fracture of shaft of left ulna, sequela

This code signifies a long-term complication or late effect arising from a transverse fracture of the shaft of the left ulna, where the bone fragments were displaced at the time of the original injury. This could encompass conditions such as malunion, nonunion, chronic pain, or functional limitations directly attributable to the previous fracture.

This code is appropriate when documenting a patient presenting with a current condition that is a direct consequence of a previously sustained displaced transverse fracture of the left ulnar shaft. It should be used for follow-up encounters addressing the sequelae, not the initial acute injury.

• Always assign an additional code to specify the exact nature of the sequela (e.g., M84.222A for malunion of left ulna).
• Do not use this code for the initial treatment of the acute fracture; use the appropriate acute fracture code with the correct encounter type.
• Ensure documentation clearly links the current condition to the prior displaced transverse fracture of the left ulnar shaft.