Barton's fx left radius, subs for opn fx type I/2 w malunion

This code signifies a malunion of a Barton's fracture affecting the left radius, which was initially an open fracture of either Type I or Type II. A Barton's fracture is an intra-articular fracture of the distal radius involving the dorsal or volar rim, and malunion indicates improper healing of the bone. This specific code is used during the healing phase after the initial treatment, when the fracture has healed incorrectly.

Use this code for patients presenting with complications of a previously treated open Barton's fracture of the left radius, specifically when the fracture has healed in an anatomically incorrect position. This applies to follow-up encounters where the physician is managing the malunion, such as for pain, functional limitation, or planning corrective surgery. It is appropriate when the initial open fracture was classified as Type I or Type II.

• Ensure documentation clearly specifies a malunion of the left radial Barton's fracture and that the original injury was an open fracture (Type I or II).
• This code is for subsequent encounters; do not use it for the initial treatment of the fracture or for nonunion.
• Verify laterality (left radius) is explicitly documented to support code assignment.