ICD-10-CM Code G90

Disorders of autonomic nervous system

Version 2021 Non-Billable Code

Not Valid for Submission

G90 is a "header" nonspecific and non-billable 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 valid for the year 2021 for the submission of HIPAA-covered transactions.

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

Consider the following ICD-10 codes with a higher level of specificity:

  • G90.0 - Idiopathic peripheral autonomic neuropathy
  • G90.01 - Carotid sinus syncope
  • G90.09 - Other idiopathic peripheral autonomic neuropathy
  • G90.1 - Familial dysautonomia [Riley-Day]
  • G90.2 - Horner's syndrome
  • G90.3 - Multi-system degeneration of the autonomic nervous system
  • G90.4 - Autonomic dysreflexia
  • G90.5 - Complex regional pain syndrome I (CRPS I)
  • G90.50 - Complex regional pain syndrome I, unspecified
  • G90.51 - Complex regional pain syndrome I of upper limb
  • G90.511 - Complex regional pain syndrome I of right upper limb
  • G90.512 - Complex regional pain syndrome I of left upper limb
  • G90.513 - Complex regional pain syndrome I of upper limb, bilateral
  • G90.519 - Complex regional pain syndrome I of unspecified upper limb
  • G90.52 - Complex regional pain syndrome I of lower limb
  • G90.521 - Complex regional pain syndrome I of right lower limb
  • G90.522 - Complex regional pain syndrome I of left lower limb
  • G90.523 - Complex regional pain syndrome I of lower limb, bilateral
  • G90.529 - Complex regional pain syndrome I of unspecified lower limb
  • G90.59 - Complex regional pain syndrome I of other specified site
  • G90.8 - Other disorders of autonomic nervous system
  • G90.9 - 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 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.
  • dysfunction of the autonomic nervous system due to alcohol G31.2

Code Classification

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

Code History

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

Information for Patients


Autonomic Nervous System Disorders

Also called: Dysautonomia

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

  • Blood pressure problems
  • Heart problems
  • Trouble with breathing and swallowing
  • Erectile dysfunction in men

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

  • Autonomic neuropathy (Medical Encyclopedia)
  • Multiple system atrophy (Medical Encyclopedia)

[Learn More]