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v1.0.0
ICD-10 Guide
ICD-10 CodesG90.1

G90.1

Billable

Familial dysautonomia [Riley-Day]

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

Code Description

ICD-10 G90.1 is a billable code used to indicate a diagnosis of familial dysautonomia [riley-day].

Key Diagnostic Point:

Familial dysautonomia, also known as Riley-Day syndrome, is a rare genetic disorder that primarily affects the autonomic nervous system. It is characterized by a range of symptoms including severe orthostatic hypotension, insensitivity to pain, temperature dysregulation, and gastrointestinal dysmotility. Patients often experience recurrent episodes of vomiting, difficulty swallowing, and a lack of tears due to autonomic dysfunction. The disorder is caused by mutations in the IKBKAP gene, which is essential for the development and function of sensory and autonomic neurons. Individuals with familial dysautonomia may also present with developmental delays and cognitive impairments. Pain syndromes are particularly complex in these patients, as they may not perceive pain in the same way as individuals without the disorder. This can lead to undiagnosed injuries and complications. Additionally, patients may develop hydrocephalus due to abnormal cerebrospinal fluid dynamics, further complicating their clinical picture. Overall, familial dysautonomia presents a unique set of challenges for diagnosis and management, requiring a multidisciplinary approach to care.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Rare condition with limited awareness among healthcare providers
  • Varied presentation of symptoms complicating diagnosis
  • Need for genetic testing to confirm diagnosis
  • Potential for co-morbid conditions requiring additional coding

Audit Risk Factors

  • Inadequate documentation of symptoms and their impact
  • Failure to document genetic testing results
  • Misdiagnosis due to symptom overlap with other conditions
  • Lack of clear linkage between diagnosis and treatment

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological assessments and documentation of autonomic symptoms are essential.

Common Clinical Scenarios

Neurological evaluations for pain management and autonomic dysfunction.

Billing Considerations

Neurologists must document the specific autonomic symptoms and their impact on daily living.

Genetics

Documentation Requirements

Genetic testing results and family history must be documented.

Common Clinical Scenarios

Counseling families about the genetic nature of the disorder.

Billing Considerations

Geneticists should provide clear documentation of the genetic mutation and its implications.

Coding Guidelines

Inclusion Criteria

Use G90.1 When
  • According to ICD
  • 10 guidelines, G90
  • 1 should be used when familial dysautonomia is confirmed through clinical evaluation and genetic testing
  • Documentation must support the diagnosis and detail the specific symptoms experienced by the patient

Exclusion Criteria

Do NOT use G90.1 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

96116CPT Code

Neuropsychological testing

Clinical Scenario

Used for assessing cognitive function in patients with familial dysautonomia.

Documentation Requirements

Document the need for testing based on cognitive concerns.

Specialty Considerations

Psychologists should note the impact of autonomic dysfunction on cognitive assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of familial dysautonomia, improving the accuracy of data collection and reimbursement processes. It has also highlighted the need for comprehensive documentation to support the diagnosis.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of familial dysautonomia, improving the accuracy of data collection and reimbursement processes. It has also highlighted the need for comprehensive documentation to support the diagnosis.

Reimbursement & Billing Impact

reimbursement processes. It has also highlighted the need for comprehensive documentation to support the diagnosis.

Resources

Clinical References

  • •
    National Organization for Rare Disorders (NORD)

Coding & Billing References

  • •
    National Organization for Rare Disorders (NORD)

Frequently Asked Questions

What is familial dysautonomia?

Familial dysautonomia is a genetic disorder that affects the autonomic nervous system, leading to a variety of symptoms including pain insensitivity, gastrointestinal issues, and orthostatic hypotension.

How is familial dysautonomia diagnosed?

Diagnosis is typically made through clinical evaluation, family history, and genetic testing to identify mutations in the IKBKAP gene.