MB26.0ICD-11 MMS 2026-01
Delusion
Description
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).
Exclusions from above levels
Child codes
MB26.00– Bizarre delusionMB26.01– Delusion of being controlledMB26.02– Delusion of guiltMB26.03– Delusion of referenceMB26.04– Erotomanic delusionMB26.05– Grandiose delusionMB26.06– Jealous delusionMB26.07– Persecutory delusionMB26.08– Religious delusionMB26.09– Somatic delusionMB26.0A– Nihilistic delusionMB26.0B– Misidentification delusionMB26.0C– Delusion of impoverishmentMB26.0Y– Other specified delusionMB26.0Z– Delusion, unspecified
Sibling codes
MB26.1– Experiences of influence, passivity, and controlMB26.2– GrandiosityMB26.3– Homicidal ideationMB26.4– Identity disturbanceMB26.5– ObsessionsMB26.6– Overvalued ideasMB26.7– Paranoid ideationMB26.8– Referential thinkingMB26.9– SuspiciousnessMB26.A– Suicidal ideationMB26.Y– Other specified symptoms or signs involving content of thoughtMB26.Z– Symptoms or signs involving content of thought, unspecified
Foundation entity
Part of: MB26: Symptoms or signs involving content of thought › 21: Symptoms, signs or clinical findings, not elsewhere classified