Disp fx of neck of first MC bone, unsp hand, init for opn fx

This code signifies a break in the neck of the first metacarpal bone (thumb) that has resulted in displacement of the bone fragments. The fracture is open, meaning there is a break in the skin communicating with the fracture site, and this is the initial encounter for treatment.

Apply this code for a patient presenting with an open, displaced fracture of the thumb metacarpal neck, regardless of which hand is affected. This code is appropriate for the initial visit where the fracture is diagnosed and definitive treatment is planned or initiated.

• Ensure documentation specifies "displaced" and "open fracture" to support this code.
• Confirm this is the patient's first encounter for this specific injury; subsequent encounters will require a different seventh character.
• Laterality (left or right hand) is not specified in this code, so it is used when the hand is not documented or is truly unspecified.