Nondisp fx of base of 4th MC bone, l hand, 7thK

This code signifies a fracture of the base of the fourth metacarpal bone in the left hand that is not displaced. The key clinical feature is that the fracture has not healed as expected, indicating a nonunion, and the patient is in a subsequent phase of care for this specific complication.

Apply this code when documentation clearly indicates a left fourth metacarpal base fracture with nonunion, and the patient is presenting for follow-up care, ongoing treatment, or evaluation of this unhealed fracture. This code is appropriate after the initial treatment phase and when the nonunion has been identified and is being managed.

• Ensure laterality (left hand) and specific bone (fourth metacarpal base) are clearly documented.
• Verify that the fracture is explicitly described as "nondisplaced" and that "nonunion" is specified as the complication.
• Confirm that the encounter is for subsequent care, not the initial treatment of the acute fracture.