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ICD-10 Guide
ICD-10 CodesG44.04

G44.04

Billable

Chronic paroxysmal hemicrania

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

Code Description

ICD-10 G44.04 is a billable code used to indicate a diagnosis of chronic paroxysmal hemicrania.

Key Diagnostic Point:

Chronic paroxysmal hemicrania (CPH) is a rare primary headache disorder characterized by recurrent, unilateral, and severe headache attacks that occur in clusters. Each attack typically lasts from 2 to 30 minutes and can occur multiple times a day. The pain is often described as sharp or stabbing and is usually accompanied by autonomic symptoms such as lacrimation, nasal congestion, or ptosis on the affected side. Unlike other headache disorders, CPH is responsive to indomethacin, a non-steroidal anti-inflammatory drug, which is a key diagnostic criterion. The condition predominantly affects women and can significantly impact quality of life due to the frequency and intensity of the attacks. Triggers for CPH may include stress, changes in sleep patterns, and certain foods or beverages, although these triggers can vary widely among individuals. Preventive treatments may include indomethacin, which is effective in most patients, and other medications such as verapamil or topiramate may be considered in refractory cases. Accurate diagnosis and treatment are essential for managing this debilitating condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Rarity of the condition, making it less familiar to coders.
  • Specificity of symptoms and treatment response required for accurate coding.
  • Differentiation from other headache disorders like migraines and cluster headaches.
  • Need for thorough documentation of symptoms and treatment response.

Audit Risk Factors

  • Inadequate documentation of headache characteristics.
  • Failure to document treatment response to indomethacin.
  • Misclassification with other headache disorders.
  • Lack of detailed patient history regarding triggers.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed headache diaries, treatment response records, and patient history.

Common Clinical Scenarios

Patients presenting with recurrent unilateral headaches, especially those unresponsive to typical migraine treatments.

Billing Considerations

Ensure documentation reflects the specific nature of the headaches and response to indomethacin.

Pain Management

Documentation Requirements

Comprehensive pain assessments and treatment plans.

Common Clinical Scenarios

Management of chronic headache patients requiring multimodal treatment approaches.

Billing Considerations

Document all interventions and their outcomes to support coding.

Coding Guidelines

Inclusion Criteria

Use G44.04 When
  • According to the ICD
  • 10 coding guidelines, G44
  • 04 should be used when the patient has a confirmed diagnosis of chronic paroxysmal hemicrania, characterized by specific symptoms and treatment response

Exclusion Criteria

Do NOT use G44.04 When
  • Exclusion criteria include other headache disorders that do not meet the diagnostic criteria for CPH

Related ICD-10 Codes

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used for follow-up visits for chronic headache management.

Documentation Requirements

Document patient history, examination findings, and treatment response.

Specialty Considerations

Neurologists should ensure detailed headache diaries are included.

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 chronic paroxysmal hemicrania, which enhances the ability to track and manage these conditions effectively.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of headache disorders, including chronic paroxysmal hemicrania, which enhances the ability to track and manage these conditions effectively.

Reimbursement & Billing Impact

reimbursement and to avoid audits.

Resources

Clinical References

  • •
    American Headache Society

Coding & Billing References

  • •
    American Headache Society

Frequently Asked Questions

What is the primary treatment for chronic paroxysmal hemicrania?

The primary treatment for chronic paroxysmal hemicrania is indomethacin, which is effective in most patients. Other medications may be considered if indomethacin is ineffective.