Oth fx first metacarpal bone, unsp hand, init for opn fx

This code signifies an open fracture of the first metacarpal bone (thumb) that is not further specified as a Bennett's or Rolando's fracture. "Open" indicates a break in the skin overlying the fracture, exposing the bone to the external environment. "Initial encounter" means this is the first time the patient is receiving active treatment for this specific injury.

Use this code for a patient presenting with a newly diagnosed, non-specific open fracture of the first metacarpal bone. This applies when the documentation clearly states an open fracture but does not specify the fracture type (e.g., "open first metacarpal fracture"). It is appropriate for the initial surgical repair or emergency department visit for this injury.

• Ensure documentation explicitly states "open fracture" and "first metacarpal."
• Verify that the encounter is for the initial treatment of the fracture, not follow-up care.
• If the fracture type (Bennett's or Rolando's) is specified, a more specific code should be used.