Unsp fx first MC bone, right hand, subs for fx w malunion

This code describes a situation where a patient has a previously diagnosed, unspecified fracture of the first metacarpal bone (thumb) in their right hand that is now healing improperly, resulting in a malunion. This indicates a follow-up visit where the physician is addressing the complications of the fracture's healing process.

Use this code for subsequent encounters where a patient presents with a right first metacarpal fracture that has healed in an unsatisfactory position, leading to functional impairment or deformity. This would apply when the malunion is being evaluated, monitored, or treated, such as for physical therapy, further imaging, or surgical planning to correct the malunion.

• Ensure documentation clearly specifies "malunion" and the "right hand" for the first metacarpal.
• This code is for subsequent encounters; an initial encounter for the fracture would use an initial encounter code.
• Always review the medical record for laterality and the specific bone involved to ensure accurate coding.