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
MB27.1 — Derealisation

ICD-11 MB27.1 — Derealisation

Experiencing other persons, objects, or the world as strange or unreal (e.g., dreamlike, distant, foggy, lifeless, colourless, or visually distorted) or feeling detached from one’s surroundings.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.