Unsp fx l forearm, subs for opn fx type 3A/B/C w nonunion

This code signifies a nonunion of an unspecified fracture in the left forearm that was initially an open fracture of types IIIA, IIIB, or IIIC. Nonunion indicates that the bone has failed to heal completely after a period of time, requiring ongoing management.

Use this code for follow-up encounters when a patient with a previously diagnosed open left forearm fracture (types IIIA, IIIB, or IIIC) is now presenting with evidence of nonunion. This applies to situations where the fracture site remains unhealed and requires further intervention or monitoring.

• Ensure documentation clearly specifies "nonunion" and the left forearm as the affected site.
• Verify the initial fracture was an open fracture classified as type IIIA, IIIB, or IIIC.
• This code is for subsequent encounters, not the initial treatment of the fracture.