MG22

ICD-11 MMS 2026-01

Fatigue

Description

A feeling of exhaustion, lethargy, or decreased energy, usually experienced as a weakening or depletion of one's physical or mental resource and characterised by a decreased capacity for work and reduced efficiency in responding to stimuli. Fatigue is normal following a period of exertion, mental or physical, but sometimes may occur in the absence of such exertion as a symptom of health conditions.

Index terms

  • Fatigue
  • General physical deterioration
  • Lethargy
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  • decline NOS
  • decreased energy
  • exhaustion
  • functional decline
  • general debilitation
  • general debility
  • general decline
  • lack of vitality
  • lethargic
  • prostration
  • slow decline
  • weak
  • weakness NOS
  • worn out

Inclusions

  • General physical deterioration
  • Lethargy

Excludes

  • 07 – Sleep-wake disorders
  • 6C20 – Bodily distress disorder
  • 8E49 – Postviral fatigue syndrome
  • http://id.who.int/icd/entity/1563440232 – Depressive disorders
  • http://id.who.int/icd/entity/613065957 – Bipolar or related disorders
  • JA65 – pregnancy-related exhaustion and fatigue
  • MG2A – senile fatigue
  • NF01 – heat exhaustion
  • NF07.2 – Exhaustion due to exposure
  • QE84 – Combat fatigue

Exclusions from above levels

  • 19 – Certain conditions originating in the perinatal period
  • JA66 – Clinical findings on antenatal screening of mother

Sibling codes

  • MG20 – Cachexia
  • MG21 – Chills
  • MG23 – Fear of death or dying
  • MG24 – Fear of disease
  • MG25 – Feeling ill
  • MG26 – Fever of other or unknown origin
  • MG27 – Haemorrhage, not elsewhere classified
  • MG28 – Hypothermia, not associated with low environmental temperature
  • MG29 – Oedema
  • MG2A – Ageing associated decline in intrinsic capacity
  • MG40 – Shock
  • MG41 – Sleep disturbance, not elsewhere classified
  • MG42 – Somnolence, not elsewhere classified
  • MG43 – Symptoms or signs concerning food or fluid intake
  • MG44 – Symptoms peculiar to infancy
  • MG45 – Syncope or collapse
  • MG46 – Systemic inflammatory response syndrome of noninfectious origin
  • MG47 – Toxicosis not further specified
  • MG48 – Unknown or unspecified causes of morbidity
  • MG49 – Hangover
  • MG4A – Multi organ failure
  • MG4Y – Other specified general symptoms

Foundation entity

Fatigue – http://id.who.int/icd/entity/1109546957

Part of: 21: Symptoms, signs or clinical findings, not elsewhere classified