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
MB25.0 — Symptoms and signs of thought disorder
MB25.03 — Incoherence

ICD-11 MB25.03 — Incoherence

Speech or thinking that is so disorganised that it is essentially incomprehensible to others.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.