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 CodesG44.01

G44.01

Billable

Episodic cluster headache

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

Code Description

ICD-10 G44.01 is a billable code used to indicate a diagnosis of episodic cluster headache.

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 are often accompanied by autonomic symptoms such as lacrimation, nasal congestion, and ptosis on the affected side. The attacks usually last between 15 minutes to 3 hours and can occur multiple times a day, often at the same time each day. The episodic nature of this condition means that patients may experience periods of frequent attacks followed by remission periods lasting weeks to months. The exact etiology of episodic cluster headaches remains unclear, but they are believed to involve dysfunction in the hypothalamus and may be triggered by factors such as alcohol consumption, smoking, and changes in sleep patterns. Effective management often includes abortive treatments like triptans and preventive therapies such as verapamil or corticosteroids. Understanding the triggers and patterns of these headaches is crucial for effective treatment and patient education.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating from other headache types
  • Identifying episodic vs. chronic forms
  • Understanding associated symptoms and triggers
  • Need for precise documentation of headache characteristics

Audit Risk Factors

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

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed headache diaries, patient history, and response to treatments.

Common Clinical Scenarios

Patients presenting with severe unilateral headaches, often with autonomic symptoms.

Billing Considerations

Neurologists must ensure accurate documentation of headache characteristics and triggers to support coding.

Primary Care

Documentation Requirements

Comprehensive patient history and symptom assessment.

Common Clinical Scenarios

Patients with recurrent headaches seeking initial evaluation and management.

Billing Considerations

Primary care providers should document any referrals to specialists and treatment responses.

Coding Guidelines

Inclusion Criteria

Use G44.01 When
  • According to ICD
  • 10 guidelines, G44
  • 01 should be used when the patient has a confirmed diagnosis of episodic cluster headache
  • It is important to document the frequency, duration, and associated symptoms of the headaches

Exclusion Criteria

Do NOT use G44.01 When
  • Exclusion criteria include headaches that do not meet the specific characteristics of cluster headaches

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for management of episodic cluster headaches.

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, including episodic cluster headaches, which enhances the accuracy of data collection and treatment tracking.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of headache disorders, including episodic cluster headaches, which enhances the accuracy of data collection and treatment tracking.

Reimbursement & Billing Impact

reimbursement and to avoid audits.

Resources

Clinical References

  • •
    American Headache Society

Coding & Billing References

  • •
    American Headache Society

Frequently Asked Questions

What are the common triggers for episodic cluster headaches?

Common triggers include alcohol consumption, smoking, strong odors, and changes in sleep patterns. Identifying and avoiding these triggers can help manage the frequency of attacks.