Oth nondisp fx of base of 1st MC bone, r hand, 7thP

This code signifies a healed or healing fracture of the base of the first metacarpal (thumb) bone on the right hand that was not displaced at the time of injury, but has subsequently healed with malunion. Malunion indicates that the bone has healed in an abnormal position, which may lead to functional impairment.

This code is appropriate for follow-up encounters where a patient presents with a previously diagnosed nondisplaced right first metacarpal base fracture that has healed with a noticeable deformity or angulation. It should be used when the malunion is documented by the treating physician and is the focus of the current encounter, such as for assessment of function or consideration of corrective measures.

• Ensure physician documentation clearly states "malunion" and specifies the right first metacarpal base.
• Verify the original fracture was nondisplaced; displaced fractures would use a different subcategory.
• This code is for subsequent encounters; use an initial encounter code for the acute injury.