G43.511

HCC Category Mapping

What This Code Means

This is a severe, ongoing migraine headache with visual or sensory warning signs (aura) that lasts for an extended period and doesn't respond well to treatment. The aura symptoms persist without causing a stroke, and the migraine itself continues for more than 72 hours despite medication.

Coding Tips

• •Verify documentation confirms both 'intractable' (resistant to treatment) and 'status migrainosus' (migraine lasting >72 hours) before assigning this code, as both conditions must be present
• •Ensure the provider has documented that this is persistent migraine aura WITHOUT cerebral infarction; if infarction is present, use a different code from the G43.6 category instead

Clinical Significance

Persistent migraine aura without cerebral infarction represents prolonged aura symptoms (visual, sensory, or speech disturbances) lasting beyond the typical 60-minute duration, without evidence of brain infarction on imaging. This condition requires careful monitoring as it may progress to migrainous infarction and indicates higher neurological risk. Proper coding distinguishes this from migrainous stroke, impacting treatment decisions and follow-up intensity.

Documentation Requirements

• ✓Documentation of prolonged aura symptoms persisting beyond 60 minutes
• ✓Specific aura type documented (visual, sensory, speech/language, motor)
• ✓Neuroimaging results (MRI preferred) confirming absence of cerebral infarction
• ✓Intractability status clearly stated by provider
• ✓Status migrainosus notation with duration >72 hours if applicable
• ✓Temporal relationship between aura onset and headache phase
• ✓Prior history of migraine with aura and any progression pattern

Commonly Confused Codes