Bennett's fracture, left hand, init encntr for open fracture

This code signifies a fracture at the base of the left thumb's first metacarpal bone, specifically an intra-articular fracture-dislocation. It is characterized by a small triangular fragment of the metacarpal base remaining attached to the trapezium, with the main metacarpal shaft dislocating radially and dorsally. The "open" designation indicates a break in the skin, exposing the bone to the external environment.

Apply this code for the initial treatment of a patient presenting with a newly diagnosed Bennett's fracture affecting the left hand, where there is an associated open wound. This is appropriate for the first encounter where definitive treatment, such as wound debridement and fracture reduction, is initiated.

• Ensure documentation clearly specifies "left hand" and "open fracture" to support this code.
• Confirm this is the patient's initial encounter for this specific injury; subsequent care would use a different encounter character.
• Always code any associated external cause of injury (e.g., fall, direct blow) with an external cause code.