Bennett's fracture, left hand, subs for fx w malunion

This code signifies a Bennett's fracture, which is an intra-articular fracture of the base of the first metacarpal bone, specifically in the left hand. The "malunion" indicates that the fracture has healed in an anatomically incorrect or misaligned position.

This code is appropriate for follow-up encounters where a patient is being treated for complications arising from a previously sustained Bennett's fracture of the left hand that has healed improperly. This could include evaluations for pain, reduced range of motion, or surgical planning to correct the malunion. It should not be used for the initial treatment of the fracture or for nonunion.

• Ensure documentation clearly specifies "left hand" and "malunion" for accurate code assignment.
• Verify that the encounter is for a subsequent visit related to the malunion, not the initial fracture care.
• Distinguish between malunion (healed incorrectly) and nonunion (failed to heal) as they have different coding pathways.