ICD-10-CM Code G90.8

Other disorders of autonomic nervous system

Version 2020 Billable Code

Valid for Submission

G90.8 is a billable code used to specify a medical diagnosis of other disorders of autonomic nervous system. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code G90.8 might also be used to specify conditions or terms like acute pandysautonomia, autonomic nervous system disorder co-occurrent and due to neurodegenerative disorder, autonomic nervous system hyperactivity, autonomic neuropathy due to disorder of immune function, autonomic neuropathy due to sodium channelopathy, baroreflex failure syndrome, etc

Short Description:Other disorders of autonomic nervous system
Long Description:Other disorders of autonomic nervous system

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code G90.8 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute pandysautonomia
  • Autonomic nervous system disorder co-occurrent and due to neurodegenerative disorder
  • Autonomic nervous system hyperactivity
  • Autonomic neuropathy due to disorder of immune function
  • Autonomic neuropathy due to sodium channelopathy
  • Baroreflex failure syndrome
  • Cold-induced sweating syndrome
  • Disorder of autonomic nervous system caused by substance
  • Disorder of autonomic nervous system due to infectious disease
  • Excessive muscarinic activity
  • Hypothermia-sweating syndrome
  • Segmental autonomic dysfunction
  • Sympathetically maintained pain
  • Syncope due to autonomic failure

Convert G90.8 to ICD-9

  • 337.9 - Autonomic nerve dis NEC (Approximate Flag)

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

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

  • 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

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