Unsp fx second MC bone, right hand, subs for fx w nonunion

This code signifies an unspecified fracture of the second metacarpal bone in the right hand that has failed to heal properly. "Nonunion" indicates that the bone fragments have not united after a sufficient period, requiring further medical intervention.

This code is appropriate for follow-up encounters where a patient with a previously diagnosed right second metacarpal fracture is being treated for nonunion. This could include evaluations for surgical intervention, cast changes, or ongoing monitoring of the nonunion.

• Ensure documentation clearly specifies "nonunion" as the complication of the fracture.
• Verify the laterality (right hand) and the specific bone (second metacarpal) are documented.
• Confirm this is a subsequent encounter, not the initial treatment for the fracture.