Nondisp transverse fx shaft of unsp ulna, 7thR

This code describes a situation where a patient has a transverse fracture of the shaft of the ulna that was initially nondisplaced. The fracture was an open fracture of type IIIA, IIIB, or IIIC, and during the healing process, the bone has united in an abnormal position (malunion). This code is specifically for a subsequent encounter, indicating ongoing treatment or follow-up for this complex fracture and its complication.

Use this code for follow-up visits or ongoing management of a patient who previously sustained an open transverse ulnar shaft fracture (Type IIIA, IIIB, or IIIC) that was initially nondisplaced, and has now developed a malunion. This would apply when the patient is seen for assessment of the malunion, planning for corrective surgery, or managing symptoms related to the malunion.

• Ensure documentation clearly specifies "subsequent encounter" and the presence of malunion.
• Verify the original fracture was an open fracture of type IIIA, IIIB, or IIIC, and initially nondisplaced.
• Do not use for initial treatment of the fracture or for nonunion.