08Diseases of the nervous system
Headache disorders
8A80Migraine
8A80.2
category
Chronic migraine
Definition Headache occurring on 15 or more days per month for more than three months, which, on at least eight days per month, has the features of migraine headache and is not associated with medication overuse.
Also indexed as
Chronic migraine
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
View this entity in the official WHO ICD-11 browser .
This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
About · Data & methodology ·
Privacy · Contact