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ICD-10 Guide
ICD-10 CodesG24.2

G24.2

Billable

Idiopathic nonfamilial dystonia

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

Code Description

ICD-10 G24.2 is a billable code used to indicate a diagnosis of idiopathic nonfamilial dystonia.

Key Diagnostic Point:

Idiopathic nonfamilial dystonia is a movement disorder characterized by sustained muscle contractions, abnormal postures, and twisting movements. Unlike familial dystonia, which has a genetic basis, idiopathic nonfamilial dystonia arises without a known hereditary component. This condition can manifest at any age and may be focal, segmental, or generalized. Patients often experience discomfort and functional impairment due to the involuntary movements. The pathophysiology of idiopathic nonfamilial dystonia is not fully understood, but it is believed to involve dysfunction in the basal ganglia, a group of nuclei in the brain responsible for coordinating movement. This disorder can be exacerbated by stress, fatigue, and certain medications, particularly those affecting dopaminergic pathways. Treatment options include botulinum toxin injections, oral medications such as anticholinergics, and dopaminergic agents, although the latter may not always be effective. Physical therapy and occupational therapy can also play a role in managing symptoms and improving quality of life.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between idiopathic and secondary dystonia
  • Understanding the nuances of movement disorders
  • The need for comprehensive patient history to rule out familial cases
  • Variability in presentation and response to treatment

Audit Risk Factors

  • Inadequate documentation of symptoms and treatment response
  • Misclassification of dystonia types
  • Failure to document the absence of familial history
  • Inconsistent use of dopaminergic medications

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, patient history, and treatment plans.

Common Clinical Scenarios

Patients presenting with abnormal movements, muscle spasms, or postural abnormalities.

Billing Considerations

Documenting the duration and severity of symptoms is crucial for accurate coding.

Physical Medicine and Rehabilitation

Documentation Requirements

Functional assessments, therapy goals, and progress notes.

Common Clinical Scenarios

Patients requiring rehabilitation for movement disorders affecting daily activities.

Billing Considerations

Focus on the impact of dystonia on functional abilities and quality of life.

Coding Guidelines

Inclusion Criteria

Use G24.2 When
  • According to ICD
  • 10 guidelines, G24
  • 2 should be used when the dystonia is idiopathic and not attributable to any known genetic or physiological condition
  • Documentation must clearly indicate the absence of familial history and provide details on the patient's clinical presentation

Exclusion Criteria

Do NOT use G24.2 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

64612CPT Code

Injection, botulinum toxin type A

Clinical Scenario

Used for treating focal dystonia in patients with G24.2.

Documentation Requirements

Document the specific muscles injected and the patient's response to previous treatments.

Specialty Considerations

Neurologists should ensure comprehensive documentation of the patient's dystonia type and treatment history.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of movement disorders, including idiopathic nonfamilial dystonia. This specificity aids in better tracking of treatment outcomes and resource allocation.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of movement disorders, including idiopathic nonfamilial dystonia. This specificity aids in better tracking of treatment outcomes and resource allocation.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of movement disorders, including idiopathic nonfamilial dystonia. This specificity aids in better tracking of treatment outcomes and resource allocation.

Resources

Clinical References

  • •
    Dystonia Medical Research Foundation

Coding & Billing References

  • •
    Dystonia Medical Research Foundation

Frequently Asked Questions

What is the difference between idiopathic and secondary dystonia?

Idiopathic dystonia occurs without a known cause, while secondary dystonia is linked to identifiable factors such as medications, trauma, or other neurological conditions.