ICD-11 MMS

21 Symptoms, signs or clinical findings, not elsewhere classified

Mental or behavioural symptoms, signs or clinical findings  (MB20-MB2Y)

MB26 Symptoms or signs involving content of thought

MB26.0 Delusion

International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01


A belief that is demonstrably untrue or not shared by others, usually based on incorrect inference about external reality. The belief is firmly held with conviction and is not, or is only briefly, susceptible to modification by experience or evidence that contradicts it. The belief is not ordinarily accepted by other members or the person's culture or subculture (i.e., it is not an article of religious faith).

sections/codes in this section (MB26.0-MB26.0)

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