ICD-10 Code G43.0 – Migraine without aura (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.0 – Migraine without aura
What it is
Use this code for migraine attacks that occur without aura, meaning there are no preceding focal neurologic symptoms such as visual, sensory, or speech changes. It identifies the headache disorder itself, not a separate cause.
Clinical signs
Typical features include recurrent headache episodes, often unilateral or pulsating, with nausea, vomiting, and light or sound sensitivity. Clinical features vary; refer to documentation.
When to use this code
Assign G43.0 when the provider documents migraine without aura, including common migraine or similar wording. Use it for active encounters when the diagnosis is confirmed and the record does not describe aura symptoms. If the note is unclear, check documentation before coding.
Do not use for
Do not use this code for migraine with aura, status migrainosus, or other specified migraine types. If the chart only says “headache” or “possible migraine,” check documentation.
Coding tip
Code only when the provider clearly distinguishes migraine without aura from other headache disorders.