Nondisp fx of base of oth metacarpal bone, init for opn fx

This code signifies a break at the very bottom (base) of a metacarpal bone other than the thumb or little finger, where the bone fragments remain in their normal anatomical position. This injury involves an open wound, meaning the skin and soft tissue were compromised, exposing the fracture site.

Apply this code for initial treatment of an open, nondisplaced fracture affecting the base of the second, third, or fourth metacarpal. This is appropriate when the patient presents for the first time for this specific injury and the fracture is visible through a skin laceration.

• Ensure the documentation specifies "nondisplaced" and "open fracture" at the base of a metacarpal other than the first or fifth.
• The "B" seventh character indicates an initial encounter for an open fracture, requiring active treatment.
• Do not use for displaced fractures, closed fractures, or fractures of the thumb or little finger metacarpals.