Fracture of symphysis of mandible, subs for fx w nonunion

This code signifies a fracture located at the mandibular symphysis, which is the midline fusion point of the two halves of the mandible. The "subsequent encounter" indicates that the patient is receiving follow-up care for this fracture, and "nonunion" specifies that the bone has failed to heal completely after a reasonable period.

Use this code for patients presenting for ongoing management of a previously diagnosed symphysis of mandible fracture that has not united. Documentation should clearly state "nonunion" or evidence of failed healing, such as persistent mobility at the fracture site or radiographic findings of a persistent fracture gap. This code is appropriate for clinic visits, hospital admissions, or surgical interventions related to addressing the nonunion.

• Always confirm the specific location of the mandibular fracture (symphysis) and the healing status (nonunion).
• Ensure the encounter is "subsequent" and not the initial treatment for the fracture.
• Distinguish from malunion (S02.66XN) or routine healing (S02.66XD, S02.66XS).