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ICD-10 Guide
ICD-10 CodesG44.011

G44.011

Billable

Episodic cluster headache, intractable

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

Code Description

ICD-10 G44.011 is a billable code used to indicate a diagnosis of episodic cluster headache, intractable.

Key Diagnostic Point:

Episodic cluster headache is characterized by recurrent, severe unilateral headaches that occur in clusters, typically lasting from weeks to months, followed by periods of remission. Intractable cluster headaches are those that do not respond to standard treatments, causing significant distress and impairment in daily functioning. Patients often experience intense pain, usually localized around one eye, accompanied by autonomic symptoms such as lacrimation, nasal congestion, and ptosis. The episodic nature of this condition means that patients may have multiple attacks within a day during a cluster period, which can last from a few weeks to several months. Triggers for these headaches can include alcohol consumption, smoking, and changes in sleep patterns. Preventive treatments may involve medications such as verapamil, corticosteroids, or lithium, while acute treatments may include triptans or oxygen therapy. Accurate coding is essential for appropriate management and reimbursement, especially given the intractable nature of the condition, which may require more intensive therapeutic interventions.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Intractable nature complicates treatment options and documentation.
  • Differentiation from other headache types requires thorough clinical evaluation.
  • Potential overlap with migraine coding can lead to confusion.
  • Need for detailed patient history to identify triggers and previous treatments.

Audit Risk Factors

  • Insufficient documentation of intractability.
  • Lack of detailed patient history regarding headache frequency and severity.
  • Failure to document response to previous treatments.
  • Inadequate differentiation from other headache disorders.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Comprehensive headache diaries, detailed patient history, and treatment response documentation.

Common Clinical Scenarios

Patients presenting with recurrent severe headaches, requiring differentiation from migraines and other headache types.

Billing Considerations

Neurologists must ensure that all treatment options and patient responses are well documented to support the intractable designation.

Pain Management

Documentation Requirements

Thorough assessment of pain levels, treatment history, and response to interventions.

Common Clinical Scenarios

Management of patients with chronic pain due to intractable headaches, often requiring multidisciplinary approaches.

Billing Considerations

Pain management specialists should document the impact of headaches on quality of life and functional status.

Coding Guidelines

Inclusion Criteria

Use G44.011 When
  • According to ICD
  • 10 guidelines, G44
  • 011 should be used when the cluster headaches are episodic and intractable
  • Documentation must clearly indicate the intractable nature of the headaches and the patient's treatment history

Exclusion Criteria

Do NOT use G44.011 When
  • Exclusion criteria include other specified headache disorders that do not meet the criteria for episodic cluster headaches

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, level 4

Clinical Scenario

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

Documentation Requirements

Detailed documentation of headache frequency, severity, and treatment response.

Specialty Considerations

Neurologists should ensure comprehensive notes to justify the level of service.

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 plans. G44.011 provides a clear distinction for intractable episodic cluster headaches, facilitating better management and reimbursement.

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 plans. G44.011 provides a clear distinction for intractable episodic cluster headaches, facilitating better management and reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Academy of Neurology - Headache Disorders

Coding & Billing References

  • •
    American Academy of Neurology - Headache Disorders

Frequently Asked Questions

What distinguishes intractable cluster headaches from other types?

Intractable cluster headaches are defined by their resistance to standard treatments, leading to significant impairment in daily life. This requires careful documentation of treatment history and response.