Unsp fracture of facial bones, subs for fx w nonunion

This code signifies a patient's return visit for an unspecific fracture of any facial bone (e.g., nasal, zygomatic, maxillary, orbital floor) that has failed to heal properly. "Nonunion" indicates that the bone fragments have not united after a sufficient healing period, requiring further medical intervention.

Apply this code for follow-up encounters where a previously diagnosed, unspecified facial bone fracture is documented as having nonunion. This typically involves ongoing management, evaluation of the nonunion, or preparation for surgical correction. Documentation should clearly state "nonunion" and specify the facial bone(s) involved, even if the exact fracture type remains unspecified.

• Ensure documentation explicitly states "nonunion" and not just delayed healing or malunion.
• This code requires a "subsequent encounter" designation; do not use for initial fracture diagnosis.
• Always sequence this code after any definitive treatment codes for the nonunion (e.g., surgical procedures).