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

This code signifies a fracture at the base of the thumb's metacarpal bone that is not displaced and has developed malunion. It indicates that the patient is presenting for follow-up care related to this previously treated fracture, where the bone has healed in an unsatisfactory alignment.

Apply this code when documenting a patient's visit for ongoing management or evaluation of a malunited fracture at the base of the first metacarpal, regardless of which hand was affected. This is appropriate for subsequent encounters after the initial treatment of the fracture.

• Ensure documentation specifies "malunion" and that the fracture is "nondisplaced" at the base of the first metacarpal.
• Verify that this is a subsequent encounter, not the initial treatment or a sequela.
• Do not use if the fracture is explicitly described as displaced or if the specific hand (left/right) is known.