ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesChapter 6: Diseases of the nervous systemG90

G90

Billable

Disorders of autonomic nervous system

Chapter 6:Diseases of the nervous system

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 G90 is a billable code used to indicate a diagnosis of disorders of autonomic nervous system.

Key Diagnostic Point:

Disorders of the autonomic nervous system (ANS) encompass a range of conditions that affect the involuntary functions of the body, including heart rate, blood pressure, digestion, and temperature regulation. These disorders can manifest as dysautonomia, which may present with symptoms such as orthostatic hypotension, syncope, and gastrointestinal dysmotility. Pain syndromes associated with autonomic dysfunction can include complex regional pain syndrome (CRPS) and neuropathic pain, where the ANS plays a role in the pain signaling pathways. Hydrocephalus, characterized by an accumulation of cerebrospinal fluid (CSF) in the brain, can also impact autonomic regulation due to pressure on brain structures that control autonomic functions. Other nervous system disorders, such as multiple sclerosis and Parkinson's disease, may also involve autonomic dysfunction, complicating the clinical picture. Accurate diagnosis often requires a multidisciplinary approach, including neurologists, cardiologists, and pain specialists, to address the multifaceted nature of these disorders.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Variety of symptoms and presentations
  • Overlap with other neurological conditions
  • Need for comprehensive diagnostic testing
  • Potential for co-morbid conditions

Audit Risk Factors

  • Inadequate documentation of symptoms
  • Failure to specify type of autonomic disorder
  • Misclassification of related pain syndromes
  • Lack of evidence for diagnostic testing

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, including autonomic testing results.

Common Clinical Scenarios

Patients presenting with syncope, orthostatic hypotension, or neuropathic pain.

Billing Considerations

Ensure documentation reflects the complexity of symptoms and any diagnostic tests performed.

Pain Management

Documentation Requirements

Comprehensive pain assessments, including pain scales and impact on daily activities.

Common Clinical Scenarios

Management of CRPS or neuropathic pain with autonomic involvement.

Billing Considerations

Document the relationship between pain symptoms and autonomic dysfunction clearly.

Coding Guidelines

Inclusion Criteria

Use G90 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the specific type of autonomic disorder
  • Include relevant clinical findings and diagnostic tests to support the use of G90

Exclusion Criteria

Do NOT use G90 When
No specific exclusions found.

Related CPT Codes

95999CPT Code

Unlisted neurological procedure

Clinical Scenario

Used when specific autonomic testing is performed but not listed elsewhere.

Documentation Requirements

Detailed report of the procedure and findings.

Specialty Considerations

Neurology specialists should ensure clarity in documentation to justify the unlisted code.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of autonomic disorders, improving the ability to capture the complexity of these conditions and their impact on patient care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of autonomic disorders, improving the ability to capture the complexity of these conditions and their impact on patient care.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of autonomic disorders, improving the ability to capture the complexity of these conditions and their impact on patient care.

Resources

Clinical References

  • •
    American Academy of Neurology
  • •
    National Institute of Neurological Disorders and Stroke

Coding & Billing References

  • •
    American Academy of Neurology
  • •
    National Institute of Neurological Disorders and Stroke

Frequently Asked Questions

What are the common symptoms of autonomic nervous system disorders?

Common symptoms include dizziness, fainting, abnormal heart rates, gastrointestinal issues, and temperature regulation problems.

How can I differentiate between autonomic and peripheral neuropathy?

Autonomic neuropathy affects involuntary functions, while peripheral neuropathy primarily impacts sensory and motor functions. Documentation should specify the nature of symptoms to clarify the diagnosis.