Unsp fx shaft of left radius, subs for clos fx w malunion

This code signifies a previously sustained fracture of the shaft of the left radius that is now in a healing phase, but with evidence of malunion. Malunion indicates that the bone fragments have healed in an anatomically incorrect or misaligned position. The fracture was initially closed, meaning the skin was not broken.

Apply this code during follow-up encounters for a left radial shaft fracture where imaging confirms malunion and the fracture is no longer acute but still undergoing treatment or observation. This is appropriate when the patient is receiving ongoing care for the improperly healed fracture, such as physical therapy or surgical planning for corrective osteotomy.

• Ensure documentation explicitly states "malunion" and specifies the left radius shaft.
• Verify the encounter is for a "subsequent encounter" and not the initial treatment of the fracture.
• Confirm the original fracture was "closed" to align with the seventh character "P".