Unsp fx l forearm, subs for opn fx type I/2 w nonunion

This code signifies a fracture of the left forearm where the specific bone (radius or ulna) and fracture type are not documented, and the fracture has failed to heal properly. It indicates that the patient is receiving ongoing care for this nonunion, and the initial injury was an open fracture classified as Type I or Type II.

Apply this code when a patient presents for follow-up treatment of a non-healing, unspecified left forearm fracture that was initially an open fracture (Type I or II). This is appropriate for subsequent encounters where the focus is on managing the nonunion, such as for bone grafting, hardware removal, or continued immobilization.

• Ensure documentation clearly states "nonunion" and specifies the left forearm.
• Verify the initial injury was an open fracture, Type I or II, even if the specific bone is not identified.
• Do not use for initial encounters or for fractures that are healing normally.