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ICD-10 Guide
ICD-10 CodesG43.419

G43.419

Billable

Hemiplegic migraine, intractable, without status migrainosus

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

Code Description

ICD-10 G43.419 is a billable code used to indicate a diagnosis of hemiplegic migraine, intractable, without status migrainosus.

Key Diagnostic Point:

Hemiplegic migraine is a rare and severe form of migraine characterized by temporary paralysis or weakness on one side of the body, known as hemiplegia. This condition can be intractable, meaning it does not respond to standard migraine treatments and can significantly impair a patient's quality of life. Patients may experience aura symptoms, including visual disturbances, sensory changes, and speech difficulties, prior to the onset of headache. The intractable nature of this migraine type often leads to prolonged episodes of headache that can last for days or weeks. Unlike status migrainosus, which is defined by a continuous migraine lasting more than 72 hours, hemiplegic migraine can occur episodically but is marked by its severe neurological symptoms. Triggers for hemiplegic migraines can include stress, hormonal changes, certain foods, and environmental factors. Preventive treatments may involve medications such as beta-blockers, anticonvulsants, or calcium channel blockers, tailored to the individual patient's needs.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Rarity of the condition makes it less familiar to coders.
  • Specificity required in documentation to differentiate from other migraine types.
  • Intractable nature necessitates detailed treatment history.
  • Potential overlap with other headache disorders complicates coding.

Audit Risk Factors

  • Insufficient documentation of neurological symptoms.
  • Failure to specify intractability in the medical record.
  • Misclassification with other types of migraines.
  • Inadequate treatment history provided.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, history of migraine episodes, and treatment responses.

Common Clinical Scenarios

Patients presenting with hemiplegic symptoms during migraine attacks, requiring differential diagnosis from stroke.

Billing Considerations

Neurologists must document the severity and frequency of episodes to justify the intractable designation.

Pain Management

Documentation Requirements

Comprehensive pain assessments and treatment plans, including medication trials and responses.

Common Clinical Scenarios

Management of chronic migraine patients who have not responded to standard therapies.

Billing Considerations

Pain management specialists should document all interventions and their outcomes to support coding.

Coding Guidelines

Inclusion Criteria

Use G43.419 When
  • According to ICD
  • 10 guidelines, G43
  • 419 should be used when the migraine is characterized by hemiplegic symptoms and is intractable
  • It is important to document the absence of status migrainosus to ensure accurate coding

Exclusion Criteria

Do NOT use G43.419 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

99214CPT Code

Established patient office visit, level 4

Clinical Scenario

Used for follow-up visits for chronic migraine management.

Documentation Requirements

Document history of present illness, review of systems, and treatment plan.

Specialty Considerations

Neurologists should ensure detailed neurological assessments 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 hemiplegic migraines, improving the accuracy of data collection and treatment tracking. This specificity aids in better understanding the condition's prevalence and management outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of hemiplegic migraines, improving the accuracy of data collection and treatment tracking. This specificity aids in better understanding the condition's prevalence and management outcomes.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Migraine Foundation

Coding & Billing References

  • •
    American Migraine Foundation

Frequently Asked Questions

What distinguishes hemiplegic migraine from other migraine types?

Hemiplegic migraine is characterized by temporary paralysis or weakness on one side of the body, which is not typical of other migraine types. It also has a genetic component and can be intractable, requiring specialized management.