ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB25 — Symptoms or signs involving form of thought
MB25.1 — Flight of ideas

ICD-11 MB25.1 — Flight of ideas

A nearly continuous flow of thoughts, usually manifested in speech, with rapid changes from topic to topic that are often based on understandable associations, distracting stimuli, or plays on words. In severe cases, the changes may be so rapid that speech is disorganised and incoherent.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.