ICD-10 Code G43.B – Ophthalmoplegic migraine (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.B – Ophthalmoplegic migraine
What it is
G43.B identifies ophthalmoplegic migraine, a rare disorder marked by headache with temporary eye muscle weakness. You use it when the record specifically documents this diagnosis.
Clinical signs
Typical findings include headache followed by one or more cranial nerve palsies affecting eye movement, often with double vision or drooping eyelid. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider diagnoses ophthalmoplegic migraine or documents migraine associated with ocular motor nerve palsy. It is appropriate when the chart links the headache episode to the ophthalmoplegic condition. Check documentation if the note only mentions headache or isolated eye palsy.
Do not use for
Do not use it for ordinary migraine without eye muscle involvement or for cranial nerve palsy from another cause. If the diagnosis is uncertain, check documentation.
Coding tip
Code G43.B only when the provider explicitly connects the headache with ophthalmoplegic migraine.