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

This code signifies a break in the neck of the first metacarpal bone (thumb) in the right hand, where the bone fragments are no longer in their normal alignment. It specifically indicates that the fracture is an open type, meaning there is a wound communicating with the fracture site.

Apply this code for patients presenting with an open, displaced fracture of the right thumb's metacarpal neck, typically resulting from direct trauma or a crush injury. This code is appropriate for the initial treatment phase of such an injury, including surgical repair or initial wound management.

• Ensure documentation clearly specifies "displaced" and "open fracture" for the right first metacarpal neck.
• The "B" in the seventh character indicates an initial encounter for an open fracture; use subsequent encounter codes for follow-up care.
• Always code the open fracture type (e.g., Gustilo-Anderson classification) if documented, in addition to this code.