ICD-10 Code G43.E1 – Chronic Migraine with Aura, Intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.E1 – Chronic migraine with aura, intractable
What it is
This code identifies chronic migraine with aura that is difficult to control. Use it when the record shows migraine occurring on 15 or more days per month, with aura, and the provider documents intractability.
Clinical signs
Clinical features vary; refer to documentation. Aura may include reversible visual, sensory, or speech symptoms before or during the headache, and the headaches are frequent enough to meet chronic migraine criteria.
When to use this code
Use this code when the clinician clearly documents chronic migraine, aura, and that the condition is intractable or refractory. It fits ongoing migraine care when prior management has not adequately controlled the headaches.
Check documentation if the note only says migraine with aura, since chronicity and intractability are required here. Code the most specific documented migraine type rather than a nonspecific headache code.
Do not use for
Do not use this code for episodic migraine with aura, migraine without aura, or unspecified headache. If intractability is not documented, check documentation and select the appropriate less specific migraine code.
Coding tip
Verify all three elements—chronic, aura, and intractable—before assigning G43.E1.