2022 ICD-10-CM Code G56

Mononeuropathies of upper limb

Version 2021

Not Valid for Submission

ICD-10:G56
Short Description:Mononeuropathies of upper limb
Long Description:Mononeuropathies of upper limb

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Nerve, nerve root and plexus disorders (G50-G59)
      • Mononeuropathies of upper limb (G56)

G56 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of mononeuropathies of upper limb. The code is not specific and is NOT valid for the year 2022 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Mononeuropathies of upper limb

Non-specific codes like G56 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for mononeuropathies of upper limb:

  • NON-BILLABLE CODE - G56.0 for Carpal tunnel syndrome
  • BILLABLE CODE - Use G56.00 for Carpal tunnel syndrome, unspecified upper limb
  • BILLABLE CODE - Use G56.01 for Carpal tunnel syndrome, right upper limb
  • BILLABLE CODE - Use G56.02 for Carpal tunnel syndrome, left upper limb
  • BILLABLE CODE - Use G56.03 for Carpal tunnel syndrome, bilateral upper limbs
  • NON-BILLABLE CODE - G56.1 for Other lesions of median nerve
  • BILLABLE CODE - Use G56.10 for Other lesions of median nerve, unspecified upper limb
  • BILLABLE CODE - Use G56.11 for Other lesions of median nerve, right upper limb
  • BILLABLE CODE - Use G56.12 for Other lesions of median nerve, left upper limb
  • BILLABLE CODE - Use G56.13 for Other lesions of median nerve, bilateral upper limbs
  • NON-BILLABLE CODE - G56.2 for Lesion of ulnar nerve
  • BILLABLE CODE - Use G56.20 for Lesion of ulnar nerve, unspecified upper limb
  • BILLABLE CODE - Use G56.21 for Lesion of ulnar nerve, right upper limb
  • BILLABLE CODE - Use G56.22 for Lesion of ulnar nerve, left upper limb
  • BILLABLE CODE - Use G56.23 for Lesion of ulnar nerve, bilateral upper limbs
  • NON-BILLABLE CODE - G56.3 for Lesion of radial nerve
  • BILLABLE CODE - Use G56.30 for Lesion of radial nerve, unspecified upper limb
  • BILLABLE CODE - Use G56.31 for Lesion of radial nerve, right upper limb
  • BILLABLE CODE - Use G56.32 for Lesion of radial nerve, left upper limb
  • BILLABLE CODE - Use G56.33 for Lesion of radial nerve, bilateral upper limbs
  • NON-BILLABLE CODE - G56.4 for Causalgia of upper limb
  • BILLABLE CODE - Use G56.40 for Causalgia of unspecified upper limb
  • BILLABLE CODE - Use G56.41 for Causalgia of right upper limb
  • BILLABLE CODE - Use G56.42 for Causalgia of left upper limb
  • BILLABLE CODE - Use G56.43 for Causalgia of bilateral upper limbs
  • NON-BILLABLE CODE - G56.8 for Other specified mononeuropathies of upper limb
  • BILLABLE CODE - Use G56.80 for Other specified mononeuropathies of unspecified upper limb
  • BILLABLE CODE - Use G56.81 for Other specified mononeuropathies of right upper limb
  • BILLABLE CODE - Use G56.82 for Other specified mononeuropathies of left upper limb
  • BILLABLE CODE - Use G56.83 for Other specified mononeuropathies of bilateral upper limbs
  • NON-BILLABLE CODE - G56.9 for Unspecified mononeuropathy of upper limb
  • BILLABLE CODE - Use G56.90 for Unspecified mononeuropathy of unspecified upper limb
  • BILLABLE CODE - Use G56.91 for Unspecified mononeuropathy of right upper limb
  • BILLABLE CODE - Use G56.92 for Unspecified mononeuropathy of left upper limb
  • BILLABLE CODE - Use G56.93 for Unspecified mononeuropathy of bilateral upper limbs

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code G56:


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Information for Patients


Peripheral Nerve Disorders

Your peripheral nerves are the ones outside your brain and spinal cord. Like static on a telephone line, peripheral nerve disorders distort or interrupt the messages between the brain and the rest of the body.

There are more than 100 kinds of peripheral nerve disorders. They can affect one nerve or many nerves. Some are the result of other diseases, like diabetic nerve problems. Others, like Guillain-Barre syndrome, happen after a virus infection. Still others are from nerve compression, like carpal tunnel syndrome or thoracic outlet syndrome. In some cases, like complex regional pain syndrome and brachial plexus injuries, the problem begins after an injury. Some people are born with peripheral nerve disorders.

Symptoms often start gradually, and then get worse. They include

Treatment aims to treat any underlying problem, reduce pain and control symptoms.

NIH: National Institute of Neurological Disorders and Stroke


[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)