ICD-10 Code G43.70 – Chronic migraine without aura, not intractable (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.70 – Chronic migraine without aura, not intractable
What it is
This code identifies chronic migraine without aura in a patient whose attacks are not described as intractable. Use it when the record shows migraine headaches occurring on a chronic basis and no aura symptoms before the headache.
Clinical signs
Typical documentation includes recurrent migraine headaches, often with throbbing pain, nausea, photophobia, or phonophobia. Clinical features vary; refer to documentation, and confirm that no aura is reported.
When to use this code
Use this code when the provider documents chronic migraine without aura and does not state that the condition is intractable. It also fits follow-up visits where the diagnosis is confirmed and no aura history is recorded.
If the note says chronic migraine but does not specify aura status, you should verify the record before coding. Check documentation if the chart uses terms such as refractory, intractable, or migraine with aura.
Do not use for
Do not use this code for migraine with aura, status migrainosus, or intractable migraine unless those terms are specifically documented. Do not assume chronicity without provider support.
Coding tip
Code only when both chronicity and absence of aura are documented; otherwise, query the provider.