ICD-10-CM Code R40: Somnolence, stupor and coma and Related Diagnosis Codes.


The ICD-10-CM (the International Classification of Diseases, Tenth Revision, Clinical Modification) is a standardized coding system used when classifying diseases and medical conditions. Healthcare providers report these codes on Medical claims when diagnosing patient care.

Explore ICD-10-CM codes, organized by chapters based on body systems and medical conditions, as outlined in the International Classification of Diseases, Tenth Revision, Clinical Modification.

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A categorized list of ICD-10-CM codes organized by chapters based on body systems or medical conditions, according to the International Classification of Diseases, Tenth Revision, Clinical Modification.

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  • 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
          • R40.2110 - Coma scale, eyes open, never, unspecified time
          • R40.2111 - Coma scale, eyes open, never, in the field [EMT or ambulance]
          • R40.2112 - Coma scale, eyes open, never, at arrival to emergency department
          • R40.2113 - Coma scale, eyes open, never, at hospital admission
          • R40.2114 - Coma scale, eyes open, never, 24 hours or more after hospital admission
        • R40.212 - Coma scale, eyes open, to pain
          • R40.2120 - Coma scale, eyes open, to pain, unspecified time
          • R40.2121 - Coma scale, eyes open, to pain, in the field [EMT or ambulance]
          • R40.2122 - Coma scale, eyes open, to pain, at arrival to emergency department
          • R40.2123 - Coma scale, eyes open, to pain, at hospital admission
          • R40.2124 - Coma scale, eyes open, to pain, 24 hours or more after hospital admission
        • R40.213 - Coma scale, eyes open, to sound
          • R40.2130 - Coma scale, eyes open, to sound, unspecified time
          • R40.2131 - Coma scale, eyes open, to sound, in the field [EMT or ambulance]
          • R40.2132 - Coma scale, eyes open, to sound, at arrival to emergency department
          • R40.2133 - Coma scale, eyes open, to sound, at hospital admission
          • R40.2134 - Coma scale, eyes open, to sound, 24 hours or more after hospital admission
        • R40.214 - Coma scale, eyes open, spontaneous
          • R40.2140 - Coma scale, eyes open, spontaneous, unspecified time
          • R40.2141 - Coma scale, eyes open, spontaneous, in the field [EMT or ambulance]
          • R40.2142 - Coma scale, eyes open, spontaneous, at arrival to emergency department
          • R40.2143 - Coma scale, eyes open, spontaneous, at hospital admission
          • R40.2144 - Coma scale, eyes open, spontaneous, 24 hours or more after hospital admission
      • R40.22 - Coma scale, best verbal response
        • R40.221 - Coma scale, best verbal response, none
          • R40.2210 - Coma scale, best verbal response, none, unspecified time
          • R40.2211 - Coma scale, best verbal response, none, in the field [EMT or ambulance]
          • R40.2212 - Coma scale, best verbal response, none, at arrival to emergency department
          • R40.2213 - Coma scale, best verbal response, none, at hospital admission
          • R40.2214 - Coma scale, best verbal response, none, 24 hours or more after hospital admission
        • R40.222 - Coma scale, best verbal response, incomprehensible words
          • R40.2220 - Coma scale, best verbal response, incomprehensible words, unspecified time
          • R40.2221 - Coma scale, best verbal response, incomprehensible words, in the field [EMT or ambulance]
          • R40.2222 - Coma scale, best verbal response, incomprehensible words, at arrival to emergency department
          • R40.2223 - Coma scale, best verbal response, incomprehensible words, at hospital admission
          • R40.2224 - Coma scale, best verbal response, incomprehensible words, 24 hours or more after hospital admission
        • R40.223 - Coma scale, best verbal response, inappropriate words
          • R40.2230 - Coma scale, best verbal response, inappropriate words, unspecified time
          • R40.2231 - Coma scale, best verbal response, inappropriate words, in the field [EMT or ambulance]
          • R40.2232 - Coma scale, best verbal response, inappropriate words, at arrival to emergency department
          • R40.2233 - Coma scale, best verbal response, inappropriate words, at hospital admission
          • R40.2234 - Coma scale, best verbal response, inappropriate words, 24 hours or more after hospital admission
        • R40.224 - Coma scale, best verbal response, confused conversation
          • R40.2240 - Coma scale, best verbal response, confused conversation, unspecified time
          • R40.2241 - Coma scale, best verbal response, confused conversation, in the field [EMT or ambulance]
          • R40.2242 - Coma scale, best verbal response, confused conversation, at arrival to emergency department
          • R40.2243 - Coma scale, best verbal response, confused conversation, at hospital admission
          • R40.2244 - Coma scale, best verbal response, confused conversation, 24 hours or more after hospital admission
        • R40.225 - Coma scale, best verbal response, oriented
          • R40.2250 - Coma scale, best verbal response, oriented, unspecified time
          • R40.2251 - Coma scale, best verbal response, oriented, in the field [EMT or ambulance]
          • R40.2252 - Coma scale, best verbal response, oriented, at arrival to emergency department
          • R40.2253 - Coma scale, best verbal response, oriented, at hospital admission
          • R40.2254 - Coma scale, best verbal response, oriented, 24 hours or more after hospital admission
      • R40.23 - Coma scale, best motor response
        • R40.231 - Coma scale, best motor response, none
          • R40.2310 - Coma scale, best motor response, none, unspecified time
          • R40.2311 - Coma scale, best motor response, none, in the field [EMT or ambulance]
          • R40.2312 - Coma scale, best motor response, none, at arrival to emergency department
          • R40.2313 - Coma scale, best motor response, none, at hospital admission
          • R40.2314 - Coma scale, best motor response, none, 24 hours or more after hospital admission
        • R40.232 - Coma scale, best motor response, extension
          • R40.2320 - Coma scale, best motor response, extension, unspecified time
          • R40.2321 - Coma scale, best motor response, extension, in the field [EMT or ambulance]
          • R40.2322 - Coma scale, best motor response, extension, at arrival to emergency department
          • R40.2323 - Coma scale, best motor response, extension, at hospital admission
          • R40.2324 - Coma scale, best motor response, extension, 24 hours or more after hospital admission
        • R40.233 - Coma scale, best motor response, abnormal flexion
          • R40.2330 - Coma scale, best motor response, abnormal flexion, unspecified time
          • R40.2331 - Coma scale, best motor response, abnormal flexion, in the field [EMT or ambulance]
          • R40.2332 - Coma scale, best motor response, abnormal flexion, at arrival to emergency department
          • R40.2333 - Coma scale, best motor response, abnormal flexion, at hospital admission
          • R40.2334 - Coma scale, best motor response, abnormal flexion, 24 hours or more after hospital admission
        • R40.234 - Coma scale, best motor response, flexion withdrawal
          • R40.2340 - Coma scale, best motor response, flexion withdrawal, unspecified time
          • R40.2341 - Coma scale, best motor response, flexion withdrawal, in the field [EMT or ambulance]
          • R40.2342 - Coma scale, best motor response, flexion withdrawal, at arrival to emergency department
          • R40.2343 - Coma scale, best motor response, flexion withdrawal, at hospital admission
          • R40.2344 - Coma scale, best motor response, flexion withdrawal, 24 hours or more after hospital admission
        • R40.235 - Coma scale, best motor response, localizes pain
          • R40.2350 - Coma scale, best motor response, localizes pain, unspecified time
          • R40.2351 - Coma scale, best motor response, localizes pain, in the field [EMT or ambulance]
          • R40.2352 - Coma scale, best motor response, localizes pain, at arrival to emergency department
          • R40.2353 - Coma scale, best motor response, localizes pain, at hospital admission
          • R40.2354 - Coma scale, best motor response, localizes pain, 24 hours or more after hospital admission
        • R40.236 - Coma scale, best motor response, obeys commands
          • R40.2360 - Coma scale, best motor response, obeys commands, unspecified time
          • R40.2361 - Coma scale, best motor response, obeys commands, in the field [EMT or ambulance]
          • R40.2362 - Coma scale, best motor response, obeys commands, at arrival to emergency department
          • R40.2363 - Coma scale, best motor response, obeys commands, at hospital admission
          • R40.2364 - Coma scale, best motor response, obeys commands, 24 hours or more after hospital admission
      • R40.24 - Glasgow coma scale, total score
        • R40.241 - Glasgow coma scale score 13-15
          • R40.2410 - Glasgow coma scale score 13-15, unspecified time
          • R40.2411 - Glasgow coma scale score 13-15, in the field [EMT or ambulance]
          • R40.2412 - Glasgow coma scale score 13-15, at arrival to emergency department
          • R40.2413 - Glasgow coma scale score 13-15, at hospital admission
          • R40.2414 - Glasgow coma scale score 13-15, 24 hours or more after hospital admission
        • R40.242 - Glasgow coma scale score 9-12
          • R40.2420 - Glasgow coma scale score 9-12, unspecified time
          • R40.2421 - Glasgow coma scale score 9-12, in the field [EMT or ambulance]
          • R40.2422 - Glasgow coma scale score 9-12, at arrival to emergency department
          • R40.2423 - Glasgow coma scale score 9-12, at hospital admission
          • R40.2424 - Glasgow coma scale score 9-12, 24 hours or more after hospital admission
        • R40.243 - Glasgow coma scale score 3-8
          • R40.2430 - Glasgow coma scale score 3-8, unspecified time
          • R40.2431 - Glasgow coma scale score 3-8, in the field [EMT or ambulance]
          • R40.2432 - Glasgow coma scale score 3-8, at arrival to emergency department
          • R40.2433 - Glasgow coma scale score 3-8, at hospital admission
          • R40.2434 - Glasgow coma scale score 3-8, 24 hours or more after hospital admission
        • R40.244 - Other coma, without documented Glasgow coma scale score, or with partial score reported
          • R40.2440 - Other coma, without documented Glasgow coma scale score, or with partial score reported, unspecified time
          • R40.2441 - Other coma, without documented Glasgow coma scale score, or with partial score reported, in the field [EMT or ambulance]
          • R40.2442 - Other coma, without documented Glasgow coma scale score, or with partial score reported, at arrival to emergency department
          • R40.2443 - Other coma, without documented Glasgow coma scale score, or with partial score reported, at hospital admission
          • R40.2444 - Other coma, without documented Glasgow coma scale score, or with partial score reported, 24 hours or more after hospital admission
      • R40.2A - Nontraumatic coma due to underlying condition
    • R40.3 - Persistent vegetative state
    • R40.4 - Transient alteration of awareness

Note: The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) codes are developed and maintained by the Centers for Disease Control and Prevention (CDC). CDC's National Center for Health Statistics (NCHS) is responsible for the clinical modification of ICD-10 for use in the United States. The World Health Organization (WHO), which owns and publishes ICD-10, authorized NCHS to develop ICD-10-CM. All modifications to ICD-10 must conform to WHO's established ICD structure and conventions. All rights are reserved by the respective entities.