Disp fx of shaft of first metacarpal bone, unsp hand, init

This code signifies a break in the main body (shaft) of the first metacarpal bone, which is the long bone connecting the thumb to the wrist. The fracture fragments are not properly aligned (displaced), and the skin over the fracture site remains intact (closed). This code is used for the initial treatment of such an injury.

Apply this code when documenting the first encounter for a patient presenting with a displaced fracture of the first metacarpal shaft, confirmed by imaging. This typically occurs following direct trauma to the thumb or hand. It is appropriate for initial evaluation, reduction, and casting/splinting of the fracture.

• Ensure documentation specifies "displaced" and "shaft" of the first metacarpal.
• Verify that the encounter is the initial treatment for a closed fracture.
• Later encounters for this fracture will require a different seventh character (e.g., D for subsequent, G for subsequent with delayed healing).