ICD-10 Code G43.911 – Migraine, unspecified, intractable, with status migrainosus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G43.911 – Migraine, unspecified, intractable, with status migrainosus
What it is
This code identifies a migraine attack that is not otherwise specified, does not respond well to usual care, and has progressed to status migrainosus. Use it when the record documents a prolonged migraine episode with severe persistence.
Clinical signs
Clinical features vary; refer to documentation. Status migrainosus generally means a migraine lasting more than a typical attack, often with disabling head pain, nausea, light sensitivity, or sound sensitivity.
When to use this code
Use this code when the clinician documents migraine, intractable, and status migrainosus, but does not specify a migraine subtype. It fits prolonged, difficult-to-control episodes that require ongoing evaluation. If the note names another migraine type, code that more specific diagnosis instead.
Do not use for
Do not use this code for a routine migraine without intractability or without status migrainosus. Check documentation if the episode is a tension headache, cluster headache, or a migraine subtype that is specifically identified elsewhere.
Coding tip
Verify that both “intractable” and “status migrainosus” are documented before assigning G43.911.