ICD-10-CM > G00-G99 > G50-G59 > G56 > G56.0 G56.0 Carpal tunnel syndrome Non-Billable/Non-Specific Codes G56.00Carpal tunnel syndrome, unspecified upper limbG56.01Carpal tunnel syndrome, right upper limbG56.02Carpal tunnel syndrome, left upper limbG56.03Carpal tunnel syndrome, bilateral upper limbs