Oth fx fourth metacarpal bone, right hand, init for opn fx

This code signifies a fracture of the fourth metacarpal bone in the right hand, which has broken through the skin, exposing the bone to the outside environment. This injury is currently in its initial phase of treatment.

This code is appropriate for documenting an open fracture of the right fourth metacarpal bone during the patient's first encounter for this specific injury. It applies when the fracture is not explicitly classified as a Boxer's fracture or other more specific metacarpal fracture types.

• Ensure documentation clearly specifies "right hand" and "fourth metacarpal" to support this code.
• Verify the fracture is explicitly described as "open" and that this is the initial encounter for treatment.
• Distinguish from closed fractures or subsequent encounters, which require different seventh characters.