Colles' fx r radius, subs for opn fx type 3A/B/C w malunion

This code signifies a Colles' fracture of the right radius that has previously been treated, but has healed in an anatomically incorrect or misaligned position (malunion). The original fracture was an open fracture, indicating a break in the skin, and was classified as a severe type (IIIA, IIIB, or IIIC) according to the Gustilo-Anderson classification system.

This code is used when a patient presents for follow-up care, evaluation, or treatment related to a previously sustained and treated Colles' fracture of the right radius that has resulted in malunion. This would include scenarios where the malunion is causing functional impairment, pain, or cosmetic concerns, and the original injury was a severe open fracture.

• Ensure documentation clearly specifies "malunion" and not "nonunion" or "delayed union."
• Verify the original fracture was explicitly documented as an open fracture type IIIA, IIIB, or IIIC.
• This code is for a subsequent encounter; an initial encounter for the malunion would use a different code.