Oth fx third MC bone, right hand, subs for fx w nonunion

This code describes a situation where a patient has sustained a fracture of their right third metacarpal bone, and the fracture has failed to heal properly, resulting in a nonunion. This indicates a persistent gap at the fracture site with no evidence of bone healing after an expected period.

This code is appropriate for documenting follow-up care for a patient whose right third metacarpal fracture has been diagnosed as a nonunion. It should be used when the patient is receiving ongoing treatment for this specific complication, such as surgical intervention for nonunion or continued conservative management.

• Ensure documentation clearly states "nonunion" of the right third metacarpal.
• Verify this is a subsequent encounter for the fracture, not the initial treatment.
• Do not use this code for malunion or delayed union; specific codes exist for those conditions.