2020 ICD-10-CM Diagnosis Code G56.0

Carpal tunnel syndrome

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • G56.0 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM G56.0 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of G56.0 - other international versions of ICD-10 G56.0 may differ.
The following code(s) above G56.0 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G56.0:
  • G00-G99
    2020 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G50-G59
    2020 ICD-10-CM Range G50-G59

    Nerve, nerve root and plexus disorders

    Type 1 Excludes
    • current traumatic nerve, nerve root and plexus disorders - see Injury, nerve by body region
    • neuralgia NOS (M79.2)
    • neuritis NOS (M79.2)
    • peripheral neuritis in pregnancy (O26.82-)
    • radiculitis NOS (M54.1-)
    Nerve, nerve root and plexus disorders
  • G56
    ICD-10-CM Diagnosis Code G56

    Mononeuropathies of upper limb

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • current traumatic nerve disorder - see nerve injury by body region
    Mononeuropathies of upper limb
Clinical Information
  • Entrapment of the median nerve in the carpal tunnel, which is formed by the flexor retinaculum and the carpal bones. This syndrome may be associated with repetitive occupational trauma (cumulative trauma disorders); wrist injuries; amyloid neuropathies; rheumatoid arthritis (see arthritis, rheumatoid); acromegaly; pregnancy; and other conditions. Symptoms include burning pain and paresthesias involving the ventral surface of the hand and fingers which may radiate proximally. Impairment of sensation in the distribution of the median nerve and thenar muscle atrophy may occur. (Joynt, Clinical Neurology, 1995, ch51, p45)
  • Entrapment of the median nerve in the carpal tunnel, which is formed by the flexor retinaculum and the carpal bones; this syndrome may be associated with repetitive occupational trauma, wrist injuries, amyloid neuropathies, rheumatoid arthritis, acromegaly, pregnancy, and other conditions; symptoms include burning pain and paresthesias involving the ventral surface of the hand and fingers which may radiate proximally; impairment of sensation in the distribution of the median nerve and thenar muscle atrophy may occur.
  • You're working at your desk, trying to ignore the tingling or numbness you've had for some time in your hand and wrist. Suddenly, a sharp, piercing pain shoots through the wrist and up your arm. Just a passing cramp? more likely you have carpal tunnel syndrome. The carpal tunnel is a narrow passageway of ligament and bones at the base of your hand. It contains nerve and tendons. Sometimes, thickening from irritated tendons or other swelling narrows the tunnel and causes the nerve to be compressed. Symptoms usually start gradually. As they worsen, grasping objects can become difficult. What causes the problem? some people have smaller carpal tunnels than other people do. Other causes include performing assembly line work, wrist injury, or swelling due to certain diseases, such as rheumatoid arthritis. Women are three times more likely to have carpal tunnel syndrome than men. Treatment includes resting your hand, splints, pain and anti-inflammatory medicines, and surgery.
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to G56.0:
  • Neuropathy, neuropathic G62.9
    ICD-10-CM Diagnosis Code G62.9

    Polyneuropathy, unspecified

      2016 2017 2018 2019 2020 Billable/Specific Code
    Applicable To
    • Neuropathy NOS
    • entrapment G58.9
      ICD-10-CM Diagnosis Code G58.9

      Mononeuropathy, unspecified

        2016 2017 2018 2019 2020 Billable/Specific Code
      • median nerve G56.0-
  • Syndrome - see also Disease
    • carpal tunnel G56.0-

ICD-10-CM Codes Adjacent To G56.0
G54.2 Cervical root disorders, not elsewhere classified
G54.3 Thoracic root disorders, not elsewhere classified
G54.4 Lumbosacral root disorders, not elsewhere classified
G54.5 Neuralgic amyotrophy
G54.6 Phantom limb syndrome with pain
G54.7 Phantom limb syndrome without pain
G54.8 Other nerve root and plexus disorders
G54.9 Nerve root and plexus disorder, unspecified
G55 Nerve root and plexus compressions in diseases classified elsewhere
G56 Mononeuropathies of upper limb
G56.0 Carpal tunnel syndrome
G56.00 …… unspecified upper limb
G56.01 …… right upper limb
G56.02 …… left upper limb
G56.03 …… bilateral upper limbs
G56.1 Other lesions of median nerve
G56.10 …… unspecified upper limb
G56.11 …… right upper limb
G56.12 …… left upper limb
G56.13 …… bilateral upper limbs
G56.2 Lesion of ulnar nerve

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.