ICD-10 Diagnosis Code G90.3

Multi-system degeneration of the autonomic nervous system

Diagnosis Code G90.3

ICD-10: G90.3
Short Description: Multi-system degeneration of the autonomic nervous system
Long Description: Multi-system degeneration of the autonomic nervous system
This is the 2019 version of the ICD-10-CM diagnosis code G90.3

Valid for Submission
The code G90.3 is valid for submission for HIPAA-covered transactions.

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

Information for Medical Professionals

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Multiple system atrophy
  • Multiple system atrophy, cerebellar variant
  • Multiple system atrophy, Parkinson's variant
  • Multisystem degeneration of autonomic nervous system
  • Orthostatic hypotension
  • Orthostatic hypotension
  • Orthostatic hypotension co-occurrent and due to Parkinson's disease
  • Parkinsonian syndrome associated with idiopathic orthostatic hypotension
  • Parkinson's disease
  • Shy-Drager syndrome
  • Sympathotonic orthostatic hypotension

Index of Diseases and Injuries
References found for the code G90.3 in the Index of Diseases and Injuries:

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)


Multiple system atrophy Multiple system atrophy is a progressive brain disorder that affects movement and balance and disrupts the function of the autonomic nervous system. The autonomic nervous system controls body functions that are mostly involuntary, such as regulation of blood pressure. The most frequent autonomic symptoms associated with multiple system atrophy are a sudden drop in blood pressure upon standing (orthostatic hypotension), urinary difficulties, and erectile dysfunction in men.Researchers have described two major types of multiple system atrophy, which are distinguished by their major signs and symptoms at the time of diagnosis. In one type, known as MSA-P, a group of movement abnormalities called parkinsonism are predominant. These abnormalities include unusually slow movement (bradykinesia), muscle rigidity, tremors, and an inability to hold the body upright and balanced (postural instability). The other type of multiple system atrophy, known as MSA-C, is characterized by cerebellar ataxia, which causes problems with coordination and balance. This form of the condition can also include speech difficulties (dysarthria) and problems controlling eye movement.Multiple system atrophy usually occurs in older adults; on average, signs and symptoms appear around age 55. The condition worsens with time, and affected individuals survive an average of 10 years after the signs and symptoms first appear.
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