21Symptoms, signs or clinical findings, not elsewhere classified
Mental or behavioural symptoms, signs or clinical findings
MB26Symptoms or signs involving content of thought
MB26.0Delusion
MB26.0B
category
Misidentification delusion
Definition A delusion that people in one’s environment, which may include family members and loved ones, are imposters or actors or are otherwise not who they seem to be.
Also indexed as
Misidentification delusion
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.
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