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ICD-10 Guide
ICD-10 CodesG44.019

G44.019

Billable

Episodic cluster headache, not intractable

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

Code Description

ICD-10 G44.019 is a billable code used to indicate a diagnosis of episodic cluster headache, not intractable.

Key Diagnostic Point:

Episodic cluster headache is a primary headache disorder characterized by recurrent, severe unilateral headaches that occur in clusters or bouts. These headaches are typically excruciating and can last from 15 minutes to three hours. Patients often experience accompanying symptoms such as nasal congestion, lacrimation, and ptosis on the affected side. The episodic nature of this condition means that patients may experience periods of frequent headaches followed by remission periods lasting weeks to months. Unlike intractable cluster headaches, which are resistant to treatment, episodic cluster headaches can often be managed effectively with appropriate therapies. Triggers for these headaches can include alcohol consumption, smoking, changes in sleep patterns, and certain medications. Preventive treatments may include verapamil, corticosteroids, and lithium, while acute treatments often involve triptans or oxygen therapy. Accurate diagnosis and coding are essential for effective management and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other headache types such as migraines and tension-type headaches.
  • Need for detailed patient history to identify episodic versus chronic patterns.
  • Documentation of associated symptoms and triggers.
  • Variability in treatment responses among patients.

Audit Risk Factors

  • Inadequate documentation of headache frequency and duration.
  • Failure to document associated symptoms.
  • Misclassification of headache type.
  • Lack of evidence for treatment efficacy.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed headache diaries, symptom descriptions, and treatment responses.

Common Clinical Scenarios

Patients presenting with recurrent severe headaches, often with a history of cluster headaches.

Billing Considerations

Neurologists must ensure clear documentation of headache characteristics to support the diagnosis.

Primary Care

Documentation Requirements

Comprehensive patient history and symptom assessment.

Common Clinical Scenarios

Patients with episodic headaches seeking management or referral to specialists.

Billing Considerations

Primary care providers should document any lifestyle factors that may contribute to headache episodes.

Coding Guidelines

Inclusion Criteria

Use G44.019 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the headache type, frequency, and associated symptoms
  • 01) when coding G44

Exclusion Criteria

Do NOT use G44.019 When
  • Exclude chronic cluster headaches (G44

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for cluster headache management.

Documentation Requirements

Document patient history, headache frequency, and treatment response.

Specialty Considerations

Neurologists may require more detailed documentation compared to primary care.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of headache disorders, improving the accuracy of diagnoses and treatment tracking for episodic cluster headaches.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of headache disorders, improving the accuracy of diagnoses and treatment tracking for episodic cluster headaches.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of headache disorders, improving the accuracy of diagnoses and treatment tracking for episodic cluster headaches.

Resources

Clinical References

  • •
    American Headache Society

Coding & Billing References

  • •
    American Headache Society

Frequently Asked Questions

What distinguishes episodic cluster headaches from chronic cluster headaches?

Episodic cluster headaches occur in clusters with periods of remission, while chronic cluster headaches occur more frequently without significant remission periods.