Unsp fracture of left forearm, subs for clos fx w nonunion

This code signifies a follow-up encounter for a left forearm fracture where the specific bone (radius or ulna) is not documented, and the fracture has failed to heal after the expected time frame (nonunion). The skin over the fracture site remains intact, indicating a closed fracture.

Apply this code when a patient presents for ongoing management of a previously diagnosed, unspecified closed fracture of the left forearm that has developed nonunion. This is appropriate for subsequent visits after initial treatment, such as for evaluation of nonunion, planning for revision surgery, or ongoing conservative management of the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the left forearm.
• Confirm the fracture is closed; if open, a different seventh character is required.
• This code is for subsequent encounters; use an initial encounter code for the first visit.