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
MB27.24 — Olfactory hallucinations

ICD-11 MB27.24 — Olfactory hallucinations

Hallucinations involving the perception of odour (e.g., of burning rubber, decaying fish, orange peel) in the absence of an actual external stimulus.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.