Chapter XVIII
Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
(R00-R99)

Symptoms and signs involving cognition, perception, emotional state and behaviour
(R40-R46)

Excludes: those constituting part of a pattern of mental disorder ( F00-F99 )

R40 Somnolence, stupor and coma
Excludes: coma:
· diabetic ( E10-E14 with common fourth character .0)
· hepatic ( K72.- )
· hypoglycaemic (nondiabetic) ( E15 )
· neonatal ( P91.5 )
· uraemic ( N19 )
R40.0 Somnolence
Drowsiness
R40.1 Stupor
Semicoma
Excludes: stupor:
· catatonic ( F20.2 )
· depressive ( F31-F33 )
· dissociative ( F44.2 )
· manic ( F30.2 )
R40.2 Coma, unspecified
Unconsciousness NOS

R41 Other symptoms and signs involving cognitive functions and awareness
Excludes: dissociative [conversion] disorders ( F44.- )
R41.0 Disorientation, unspecified
Confusion NOS
Excludes: psychogenic disorientation ( F44.8 )
R41.1 Anterograde amnesia
R41.2 Retrograde amnesia
R41.3 Other amnesia
Amnesia NOS
Excludes: amnesic syndrome:
· due to psychoactive substance use ( F10-F19 with common fourth character .6)
· organic ( F04 )
transient global amnesia ( G45.4 )
R41.8 Other and unspecified symptoms and signs involving cognitive functions and awareness

R42 Dizziness and giddiness
Light-headedness
Vertigo NOS
Excludes: vertiginous syndromes ( H81.- )

R43 Disturbances of smell and taste
R43.0 Anosmia
R43.1 Parosmia
R43.2 Parageusia
R43.8 Other and unspecified disturbances of smell and taste
Mixed disturbance of smell and taste

R44 Other symptoms and signs involving general sensations and perceptions
Excludes: disturbances of skin sensation ( R20.- )
R44.0 Auditory hallucinations
R44.1 Visual hallucinations
R44.2 Other hallucinations
R44.3 Hallucinations, unspecified
R44.8 Other and unspecified symptoms and signs involving general sensations and perceptions

R45 Symptoms and signs involving emotional state
R45.0 Nervousness
Nervous tension
R45.1 Restlessness and agitation
R45.2 Unhappiness
Worries NOS
R45.3 Demoralization and apathy
R45.4 Irritability and anger
R45.5 Hostility
R45.6 Physical violence
R45.7 State of emotional shock and stress, unspecified
R45.8 Other symptoms and signs involving emotional state
Suicidal ideation (tendencies)
Excludes: suicidal ideation constituting part of a mental disorder ( F00-F99 )

R46 Symptoms and signs involving appearance and behaviour
R46.0 Very low level of personal hygiene
R46.1 Bizarre personal appearance
R46.2 Strange and inexplicable behaviour
R46.3 Overactivity
R46.4 Slowness and poor responsiveness
Excludes: stupor ( R40.1 )
R46.5 Suspiciousness and marked evasiveness
R46.6 Undue concern and preoccupation with stressful events
R46.7 Verbosity and circumstantial detail obscuring reason for contact
R46.8 Other symptoms and signs involving appearance and behaviour