Oth nondisp fx of base of 1st MC bone, unsp hand, 7thK

This code signifies a follow-up encounter for a fracture at the base of the first metacarpal bone (thumb) that was initially nondisplaced, but has subsequently failed to heal properly (nonunion). The specific hand affected is not documented.

Use this code when a patient presents for ongoing management of a previously diagnosed nondisplaced fracture of the first metacarpal base, and the physician's assessment indicates that the bone has not united as expected. This would apply to situations like follow-up appointments for casting, physical therapy, or surgical planning related to the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the base of the first metacarpal.
• Confirm the initial fracture was nondisplaced; displaced fractures would use a different code.
• This code is for subsequent encounters only; an initial encounter for the nonunion would use a different code.