Nondisp fx of shaft of 4th MC bone, l hand, 7thK

This code describes a fracture in the long, central part of the fourth metacarpal bone in the left hand that has not shifted out of alignment. The fracture has failed to heal properly, and the patient is presenting for follow-up care related to this nonunion.

This code is appropriate for encounters where a patient is being treated for a previously diagnosed, nondisplaced shaft fracture of the left fourth metacarpal that has progressed to nonunion. This includes visits for evaluation, management, or surgical intervention specifically addressing the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the fourth metacarpal of the left hand.
• Verify the fracture was initially nondisplaced and located in the shaft.
• Always assign an additional code for any associated complications or external causes, if applicable.