ICD-11 classes
21 Symptoms, signs or clinical findings, not elsewhere...
Mental or behavioural symptoms, signs or clinical findings
MB22 — Symptoms or signs involving motivation or energy
MB22.7 — Tiredness

ICD-11 MB22.7 — Tiredness

Feeling of reduced alertness and an accompanying decrease in mental acuity, in some cases resulting in an impulse or tendency to fall asleep.

The diagnosis includes nothing.

The diagnosis excludes nothing.

It has no clarifying diagnoses.