ICD-10 Code G43 – Migraine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43 – Migraine
What it is
G43 identifies migraine, a primary headache disorder marked by recurrent attacks. It is used when the record supports migraine but does not specify a more detailed subtype.
Clinical signs
Typical features include unilateral or throbbing head pain, nausea, and sensitivity to light or sound. Clinical features vary; refer to documentation.
When to use this code
Use G43 when the clinician documents migraine without a more specific ICD-10 subtype. It may apply to recurrent migraine episodes, including visits for evaluation, follow-up, or worsening symptoms. If the record names aura, status migrainosus, or another subtype, code to the documented specificity.
Do not use for
Do not use G43 for nonspecific headache, tension-type headache, or other headache disorders. Check documentation if the note does not clearly support migraine.
Coding tip
Code to the highest documented specificity; if the subtype is unclear, use the unspecified migraine code only when the record supports migraine.