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
MB27.2 — Hallucinations
MB27.23 — Hypnagogic hallucinations

ICD-11 MB27.23 — Hypnagogic hallucinations

Hallucinations that occur at the onset of sleep, most commonly of the visual, tactile or auditory modality.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.