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ICD-10 Guide
ICD-10 CodesG24.02

G24.02

Billable

Drug induced acute dystonia

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

Code Description

ICD-10 G24.02 is a billable code used to indicate a diagnosis of drug induced acute dystonia.

Key Diagnostic Point:

Drug induced acute dystonia is a movement disorder characterized by sustained muscle contractions, abnormal postures, and involuntary movements, which are precipitated by the use of certain medications, particularly antipsychotics and other dopaminergic agents. This condition is often seen in patients receiving treatment for psychiatric disorders, such as schizophrenia, or in those with Parkinson's disease who are undergoing dopaminergic therapy. Acute dystonia can manifest as torticollis, oculogyric crisis, or other abnormal movements, typically occurring within hours to days after the initiation of the offending drug or dose escalation. The pathophysiology involves an imbalance in the dopaminergic and cholinergic systems in the basal ganglia, leading to excessive cholinergic activity. Clinicians must be vigilant in recognizing the signs of acute dystonia, as timely intervention with anticholinergic medications or benzodiazepines can alleviate symptoms and prevent complications. Accurate coding of this condition is essential for appropriate treatment and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between drug-induced dystonia and other movement disorders.
  • Understanding the specific medications that can cause acute dystonia.
  • Recognizing the acute nature of the condition versus chronic forms.
  • Documenting the onset and duration of symptoms accurately.

Audit Risk Factors

  • Inadequate documentation of the specific drug causing the dystonia.
  • Failure to document the acute nature of the symptoms.
  • Misclassification of dystonia type (acute vs. chronic).
  • Lack of evidence for the diagnosis in the medical record.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed history of medication use, onset of symptoms, and neurological examination findings.

Common Clinical Scenarios

Patients presenting with acute dystonic reactions after starting or increasing doses of antipsychotic medications.

Billing Considerations

Consideration of other neurological conditions that may mimic acute dystonia.

Psychiatry

Documentation Requirements

Thorough documentation of psychiatric history, medication regimen, and any previous episodes of dystonia.

Common Clinical Scenarios

Patients experiencing acute dystonia after initiation of antipsychotic treatment.

Billing Considerations

Monitoring for potential side effects of medications and adjusting treatment plans accordingly.

Coding Guidelines

Inclusion Criteria

Use G24.02 When
  • According to ICD
  • 10 guidelines, G24
  • 02 should be used when the dystonia is specifically induced by a drug
  • Documentation must clearly indicate the drug responsible and the acute nature of the symptoms

Exclusion Criteria

Do NOT use G24.02 When
  • Exclusion criteria include dystonia not related to drug use

Related ICD-10 Codes

Related CPT Codes

96372CPT Code

Therapeutic, prophylactic, or diagnostic injection into the subcutaneous or intramuscular area

Clinical Scenario

Used when administering anticholinergic medications for acute dystonia.

Documentation Requirements

Document the medication administered, dosage, and patient response.

Specialty Considerations

Neurology and psychiatry may have specific protocols for managing acute dystonia.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of drug-induced conditions, improving the accuracy of diagnosis and treatment tracking. G24.02 provides a clear distinction from other forms of dystonia, facilitating better patient management and research.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of drug-induced conditions, improving the accuracy of diagnosis and treatment tracking. G24.02 provides a clear distinction from other forms of dystonia, facilitating better patient management and research.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What medications are commonly associated with drug-induced acute dystonia?

Common medications include first-generation antipsychotics like haloperidol, second-generation antipsychotics like risperidone, and certain antiemetics such as metoclopramide. It's important to review the patient's medication history to identify potential triggers.