ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB27 — Symptoms or signs involving perceptual disturbance
MB27.0 — Depersonalisation

ICD-11 MB27.0 — Depersonalisation

Experiencing the self as strange or unreal, or feeling detached from, or as though one were an outside observer of, one’s thoughts, feelings, sensations, body, or actions. Depersonalization may take the form of emotional and/or physical numbing, a sense of watching oneself from a distance or ‘being in a play’, or perceptual alterations (e.g., a distorted sense of time).

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.