| R40 | Somnolence, stupor and coma |
| R40.0 | Somnolence |
| R40.1 | Stupor |
| R40.2 | Coma |
| R40.20 | Unspecified coma |
| R40.21 | Coma scale, eyes open |
| R40.211 | Coma scale, eyes open, never |
| R40.212 | Coma scale, eyes open, to pain |
| R40.213 | Coma scale, eyes open, to sound |
| R40.214 | Coma scale, eyes open, spontaneous |
| R40.22 | Coma scale, best verbal response |
| R40.221 | Coma scale, best verbal response, none |
| R40.222 | Coma scale, best verbal response, incomprehensible words |
| R40.223 | Coma scale, best verbal response, inappropriate words |
| R40.224 | Coma scale, best verbal response, confused conversation |
| R40.225 | Coma scale, best verbal response, oriented |
| R40.23 | Coma scale, best motor response |
| R40.231 | Coma scale, best motor response, none |
| R40.232 | Coma scale, best motor response, extension |
| R40.233 | Coma scale, best motor response, abnormal flexion |
| R40.234 | Coma scale, best motor response, flexion withdrawal |
| R40.235 | Coma scale, best motor response, localizes pain |
| R40.236 | Coma scale, best motor response, obeys commands |
| R40.24 | Glasgow coma scale, total score |
| R40.241 | Glasgow coma scale score 13-15 |
| R40.242 | Glasgow coma scale score 9-12 |
| R40.243 | Glasgow coma scale score 3-8 |
| R40.244 | Other coma, without documented Glasgow coma scale score, or with partial score reported |
| R40.3 | Persistent vegetative state |
| R40.4 | Transient alteration of awareness |
| R41 | Other symptoms and signs involving cognitive functions and awareness |
| R41.0 | Disorientation, unspecified |
| R41.1 | Anterograde amnesia |
| R41.2 | Retrograde amnesia |
| R41.3 | Other amnesia |
| R41.4 | Neurologic neglect syndrome |
| R41.8 | Other symptoms and signs involving cognitive functions and awareness |
| R41.81 | Age-related cognitive decline |
| R41.82 | Altered mental status, unspecified |
| R41.83 | Borderline intellectual functioning |
| R41.84 | Other specified cognitive deficit |
| R41.840 | Attention and concentration deficit |
| R41.841 | Cognitive communication deficit |
| R41.842 | Visuospatial deficit |
| R41.843 | Psychomotor deficit |
| R41.844 | Frontal lobe and executive function deficit |
| R41.89 | Other symptoms and signs involving cognitive functions and awareness |
| R41.9 | Unspecified symptoms and signs involving cognitive functions and awareness |
| R42 | Dizziness and giddiness |
| R43 | Disturbances of smell and taste |
| R43.0 | Anosmia |
| R43.1 | Parosmia |
| R43.2 | Parageusia |
| R43.8 | Other disturbances of smell and taste |
| R43.9 | Unspecified disturbances of smell and taste |
| R44 | Other symptoms and signs involving general sensations and perceptions |
| R44.0 | Auditory hallucinations |
| R44.1 | Visual hallucinations |
| R44.2 | Other hallucinations |
| R44.3 | Hallucinations, unspecified |
| R44.8 | Other symptoms and signs involving general sensations and perceptions |
| R44.9 | Unspecified symptoms and signs involving general sensations and perceptions |
| R45 | Symptoms and signs involving emotional state |
| R45.0 | Nervousness |
| R45.1 | Restlessness and agitation |
| R45.2 | Unhappiness |
| R45.3 | Demoralization and apathy |
| R45.4 | Irritability and anger |
| R45.5 | Hostility |
| R45.6 | Violent behavior |
| R45.7 | State of emotional shock and stress, unspecified |
| R45.8 | Other symptoms and signs involving emotional state |
| R45.81 | Low self-esteem |
| R45.82 | Worries |
| R45.83 | Excessive crying of child, adolescent or adult |
| R45.84 | Anhedonia |
| R45.85 | Homicidal and suicidal ideations |
| R45.850 | Homicidal ideations |
| R45.851 | Suicidal ideations |
| R45.86 | Emotional lability |
| R45.87 | Impulsiveness |
| R45.88 | Nonsuicidal self-harm |
| R45.89 | Other symptoms and signs involving emotional state |
| R46 | Symptoms and signs involving appearance and behavior |
| R46.0 | Very low level of personal hygiene |
| R46.1 | Bizarre personal appearance |
| R46.2 | Strange and inexplicable behavior |
| R46.3 | Overactivity |
| R46.4 | Slowness and poor responsiveness |
| 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 behavior |
| R46.81 | Obsessive-compulsive behavior |
| R46.89 | Other symptoms and signs involving appearance and behavior |
| R47 | Speech disturbances, not elsewhere classified |
| R47.0 | Dysphasia and aphasia |
| R47.01 | Aphasia |
| R47.02 | Dysphasia |
| R47.1 | Dysarthria and anarthria |
| R47.8 | Other speech disturbances |
| R47.81 | Slurred speech |
| R47.82 | Fluency disorder in conditions classified elsewhere |
| R47.89 | Other speech disturbances |
| R47.9 | Unspecified speech disturbances |
| R48 | Dyslexia and other symbolic dysfunctions, not elsewhere classified |
| R48.0 | Dyslexia and alexia |
| R48.1 | Agnosia |
| R48.2 | Apraxia |
| R48.3 | Visual agnosia |
| R48.8 | Other symbolic dysfunctions |
| R48.9 | Unspecified symbolic dysfunctions |
| R49 | Voice and resonance disorders |
| R49.0 | Dysphonia |
| R49.1 | Aphonia |
| R49.2 | Hypernasality and hyponasality |
| R49.21 | Hypernasality |
| R49.22 | Hyponasality |
| R49.8 | Other voice and resonance disorders |
| R49.9 | Unspecified voice and resonance disorder |