Unsp fracture of first metacarpal bone, left hand, init

This code signifies a fracture of the first metacarpal bone (thumb) in the left hand, where the specific type of fracture (e.g., Bennett, Rolando, transverse) is not documented. It indicates that the skin over the fracture site remains intact, and this is the initial treatment encounter for the injury.

This code is appropriate for initial encounters where a left first metacarpal fracture is diagnosed, but the physician's documentation does not specify the fracture's morphology. It is used when the fracture is closed, meaning there is no open wound communicating with the fracture site.

• Ensure the documentation clearly states "left hand" and "first metacarpal" to support this specific code.
• Verify that the encounter is for the initial treatment of the fracture and that it is explicitly documented as "closed."
• If the fracture type is later identified, a more specific code should be used for subsequent encounters.