2022 ICD-10-CM Code G90

Disorders of autonomic nervous system

Version 2021

Not Valid for Submission

ICD-10:G90
Short Description:Disorders of autonomic nervous system
Long Description:Disorders of autonomic nervous system

Code Classification

  • Diseases of the nervous system (G00–G99)
    • Other disorders of the nervous system (G89-G99)
      • Disorders of autonomic nervous system (G90)

G90 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of disorders of autonomic nervous system. 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 Disorders of autonomic nervous system

Non-specific codes like G90 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 disorders of autonomic nervous system:

  • NON-BILLABLE CODE - G90.0 for Idiopathic peripheral autonomic neuropathy
  • BILLABLE CODE - Use G90.01 for Carotid sinus syncope
  • BILLABLE CODE - Use G90.09 for Other idiopathic peripheral autonomic neuropathy
  • BILLABLE CODE - Use G90.1 for Familial dysautonomia [Riley-Day]
  • BILLABLE CODE - Use G90.2 for Horner's syndrome
  • BILLABLE CODE - Use G90.3 for Multi-system degeneration of the autonomic nervous system
  • BILLABLE CODE - Use G90.4 for Autonomic dysreflexia
  • NON-BILLABLE CODE - G90.5 for Complex regional pain syndrome I (CRPS I)
  • BILLABLE CODE - Use G90.50 for Complex regional pain syndrome I, unspecified
  • NON-BILLABLE CODE - G90.51 for Complex regional pain syndrome I of upper limb
  • NON-BILLABLE CODE - G90.52 for Complex regional pain syndrome I of lower limb
  • BILLABLE CODE - Use G90.59 for Complex regional pain syndrome I of other specified site
  • BILLABLE CODE - Use G90.8 for Other disorders of autonomic nervous system
  • BILLABLE CODE - Use G90.9 for Disorder of the autonomic nervous system, unspecified

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 G90:


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


Autonomic Nervous System Disorders

Your autonomic nervous system is the part of your nervous system that controls involuntary actions, such as the beating of your heart and the widening or narrowing of your blood vessels. When something goes wrong in this system, it can cause serious problems, including

Autonomic nervous system disorders can occur alone or as the result of another disease, such as Parkinson's disease, alcoholism and diabetes. Problems can affect either part of the system, as in complex regional pain syndromes, or all of the system. Some types are temporary, but many worsen over time. When they affect your breathing or heart function, these disorders can be life-threatening.

Some autonomic nervous system disorders get better when an underlying disease is treated. Often, however, there is no cure. In that case, the goal of treatment is to improve symptoms.

NIH: National Institute of Neurological Disorders and Stroke


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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)