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ICD-10 Guide
ICD-10 CodesG43.40

G43.40

Billable

Hemiplegic migraine, not intractable

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

Code Description

ICD-10 G43.40 is a billable code used to indicate a diagnosis of hemiplegic migraine, not intractable.

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 is often accompanied by typical migraine symptoms such as severe headache, nausea, vomiting, and sensitivity to light and sound. The hemiplegic symptoms can mimic those of a stroke, making it crucial for healthcare providers to differentiate between the two. Hemiplegic migraines can be triggered by various factors, including stress, hormonal changes, certain foods, and environmental stimuli. Unlike intractable hemiplegic migraines, which are resistant to treatment, the non-intractable variant allows for effective management through preventive treatments and acute interventions. Patients may benefit from lifestyle modifications, pharmacological therapies, and regular follow-ups to monitor the frequency and severity of attacks. Understanding the triggers and implementing preventive strategies can significantly improve the quality of life for individuals suffering from this debilitating condition.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiation from other types of migraines and stroke-like symptoms.
  • Need for comprehensive patient history to identify triggers.
  • Potential overlap with other neurological conditions.
  • Documentation of non-intractable status and treatment response.

Audit Risk Factors

  • Inadequate documentation of hemiplegic symptoms.
  • Failure to specify non-intractable status.
  • Misclassification of migraine type.
  • Lack of documented treatment plans or responses.

Specialty Focus

Medical Specialties

Neurology

Documentation Requirements

Detailed neurological examination findings, patient history of migraines, and treatment responses.

Common Clinical Scenarios

Patients presenting with hemiplegic symptoms during a migraine attack, requiring differentiation from stroke.

Billing Considerations

Neurologists must ensure clear documentation of the migraine type and any neurological assessments performed.

Primary Care

Documentation Requirements

Comprehensive patient history, including migraine triggers and previous treatments.

Common Clinical Scenarios

Patients with recurrent migraines presenting with new hemiplegic symptoms.

Billing Considerations

Primary care providers should be vigilant in recognizing hemiplegic migraines and refer to specialists as needed.

Coding Guidelines

Inclusion Criteria

Use G43.40 When
  • According to ICD
  • 10 guidelines, G43
  • 40 should be used when documenting hemiplegic migraines that are not classified as intractable
  • Coders must ensure that the patient's symptoms and treatment responses are well
  • documented to support the use of this code

Exclusion Criteria

Do NOT use G43.40 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 patients with hemiplegic migraines.

Documentation Requirements

Document history of present illness, examination findings, and treatment plan.

Specialty Considerations

Neurologists may require additional documentation of neurological assessments.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of migraine types, including hemiplegic migraines. This specificity aids in better tracking of migraine-related healthcare utilization and outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of migraine types, including hemiplegic migraines. This specificity aids in better tracking of migraine-related healthcare utilization and outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of migraine types, including hemiplegic migraines. This specificity aids in better tracking of migraine-related healthcare utilization and outcomes.

Resources

Clinical References

  • •
    American Migraine Foundation

Coding & Billing References

  • •
    American Migraine Foundation

Frequently Asked Questions

What distinguishes hemiplegic migraine from other types of migraines?

Hemiplegic migraine is characterized by temporary paralysis or weakness on one side of the body, which is not seen in typical migraines. It requires careful assessment to differentiate from stroke-like symptoms.