Unsp fx fifth MC bone, right hand, subs for fx w nonunion

This code signifies an unconfirmed fracture of the fifth metacarpal bone in the right hand that has failed to heal properly. The patient is presenting for follow-up care or treatment related to this ongoing nonunion.

Apply this code when a patient with a previously diagnosed, but unspecified, fracture of the right fifth metacarpal presents for management of a nonunion. This would include scenarios such as surgical intervention for nonunion, casting changes, or evaluation of healing progress when nonunion is confirmed.

• Ensure documentation clearly states "nonunion" and specifies the fifth metacarpal of the right hand.
• This code is for subsequent encounters; an initial encounter for the nonunion would use a different code.
• Verify laterality (right hand) and bone (fifth metacarpal) are explicitly documented.