Disp fx of base of unsp metacarpal bone, init for opn fx

This code signifies a break in the base of any of the metacarpal bones in the hand, where the bone fragments are not properly aligned. It specifically indicates that the skin and soft tissues overlying the fracture site have been compromised, exposing the bone to the external environment. This is the initial encounter for treatment of this open injury.

This code is appropriate for documenting the initial treatment of a patient presenting with an open fracture at the base of an unspecified metacarpal bone. This includes scenarios such as a crush injury to the hand with visible bone, or a penetrating wound that has fractured the metacarpal base. It should be used when the specific metacarpal bone (e.g., first, second) is not documented.

• Ensure documentation clearly states "open fracture" and "displaced" for accurate code assignment.
• Verify that this is the initial encounter for treatment; subsequent care will require different encounter codes.
• If the specific metacarpal bone is identified in the documentation, a more precise code should be selected.