LeFort III fracture, subs encntr for fracture with nonunion

This code describes a LeFort III fracture, which is a complete craniofacial disjunction separating the facial skeleton from the skull base, that has failed to heal properly (nonunion). This specific code is used when the patient is receiving active treatment for the nonunion during a subsequent encounter, not for the initial injury.

Use this code for patients presenting for follow-up care, surgical intervention, or other active management of a previously diagnosed LeFort III fracture that has been confirmed as a nonunion. Documentation should clearly state "LeFort III fracture," "nonunion," and indicate that the encounter is for ongoing treatment of this specific complication.

• Ensure documentation explicitly states "nonunion" and that the encounter is for active treatment of this complication, not routine follow-up of a healed fracture.
• Do not use this code for initial treatment of a LeFort III fracture; refer to the acute fracture codes.
• Consider sequencing this code after any external cause codes (e.g., Y92.-, V00-Y99) if applicable and known.