Symptoms, signs or clinical findings involving consciousness

Description

Symptoms, signs, and clinical findings indicative of a disturbance in the state or quality of awareness of oneself and the environment, alertness, or clarity of the wakeful state. [1]

Subcategories

• MB20.0 Stupor

  Total or nearly total lack of spontaneous movement and marked decrease in reactivity to environment. [1]

• MB20.1 Coma

  Acute state lasting more than one hour and usually less than a month. The comatose patient is unresponsive, lying with their eyes closed and cannot be aroused even by vigorous and noxious stimuli. Motor responses to noxious stimulation are limited to reflexive behaviour. Etiologies include but are not limited to traumatic, anoxic, infectious, neoplastic, vascular, inflammatory and metabolic brain injuries. [1]

• MB20.2 Clouding of consciousness

  An impairment in the clarity of consciousness characterised by impaired ability to comprehend aspects of the environment or the self in relation to the environment, inattention, and abnormalities in thought processes, comprehension. It is typically accompanied by subjective experience of mental clouding described as feeling ‘foggy’. Clouding of consciousness is a common form of cognitive disturbance in Delirium, but it is not synonymous with Delirium because Delirium includes additional diagnostic requirements. [1]

Coded elsewhere

• newborn uremic coma (KC01)
• Delirium (6D70)
• Psychomotor retardation (MB23.N)

References

1. World Health Organization. International Classification of Diseases, 11th Revision, for Mortality and Morbidity Statistics (ICD-11 MMS), 2026-01 release. World Health Organization; 2026.

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