Carpal tunnel syndrome, right upper limb

This code identifies a specific mononeuropathy affecting the median nerve as it passes through the carpal tunnel in the wrist, resulting in symptoms such as pain, numbness, tingling, and weakness in the thumb, index, middle, and radial half of the ring finger. It specifies the involvement of the right upper extremity.

Apply this code when documentation clearly indicates a diagnosis of carpal tunnel syndrome affecting the patient's right hand or wrist. Supporting documentation typically includes physician notes detailing characteristic symptoms, physical examination findings (e.g., positive Tinel's sign or Phalen's maneuver), and often nerve conduction studies confirming median nerve compression at the wrist.

• Ensure laterality is explicitly documented as "right" to support this specific code.
• Distinguish from carpal tunnel syndrome affecting the left upper limb (G56.02) or bilateral involvement (G56.03).
• Consider sequencing this code as the primary diagnosis when it is the reason for the encounter, especially for diagnostic workups or surgical interventions.