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

This code describes a fracture of the neck of the fourth metacarpal bone in the left hand that is not displaced. The "subsequent encounter" indicates that the patient is receiving follow-up care for this fracture, and "nonunion" specifies that the bone fragments have failed to heal together after a reasonable period.

This code is used when a patient presents for ongoing treatment of a previously diagnosed, nondisplaced fracture of the left fourth metacarpal neck, and imaging or clinical assessment confirms that the fracture has not united. This would apply to visits for cast changes, physical therapy, or surgical planning for nonunion.

• Ensure documentation clearly states "nonunion" and specifies the fourth metacarpal of the left hand.
• Verify the fracture is explicitly described as "nondisplaced" to use this specific code.
• Confirm this is a subsequent encounter for care related to the fracture, not the initial treatment.