Oth physl fx upper end rad, unsp arm, subs for fx w nonunion

This code signifies a fracture of the growth plate (physis) at the upper end of the radius bone, where the specific type of physeal fracture is not otherwise specified. The injury is located in an unspecified arm, and the patient is presenting for follow-up care due to the fracture not healing properly (nonunion).

Use this code for subsequent encounters when a patient with a previously diagnosed, unspecified physeal fracture of the proximal radius is being managed for a confirmed nonunion. This applies when the laterality of the arm was not documented or is unknown.

• Ensure documentation clearly states "nonunion" for the fracture.
• Verify that the encounter is for follow-up care, not the initial treatment.
• Only use "unspecified arm" when laterality is genuinely not documented.