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  3. Ch. R00-R99
  4. Sec. R40-R46
  5. Category R40
Category R40

Somnolence, stupor and coma

Clinical Classification Guidelines

Specific Diagnosis Codes

Somnolence
R40.0
Stupor
R40.1
Coma
R40.2
Unspecified coma
R40.20
Coma scale, eyes open
R40.21
Coma scale, eyes open, never
R40.211
Coma scale, eyes open, to pain
R40.212
Coma scale, eyes open, to sound
R40.213
Coma scale, eyes open, spontaneous
R40.214
Coma scale, best verbal response
R40.22
Coma scale, best verbal response, none
R40.221
Coma scale, best verbal response, incomprehensible words
R40.222
Coma scale, best verbal response, inappropriate words
R40.223
Coma scale, best verbal response, confused conversation
R40.224
Coma scale, best verbal response, oriented
R40.225
Coma scale, best motor response
R40.23
Coma scale, best motor response, none
R40.231
Coma scale, best motor response, extension
R40.232
Coma scale, best motor response, abnormal flexion
R40.233
Coma scale, best motor response, flexion withdrawal
R40.234
Coma scale, best motor response, localizes pain
R40.235
Coma scale, best motor response, obeys commands
R40.236
Glasgow coma scale, total score
R40.24
Glasgow coma scale score 13-15
R40.241
Glasgow coma scale score 9-12
R40.242
Glasgow coma scale score 3-8
R40.243
Other coma, without documented Glasgow coma scale score, or with partial score reported
R40.244
Nontraumatic coma due to underlying condition
R40.2A
Persistent vegetative state
R40.3
Transient alteration of awareness
R40.4
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Data updated for October 2025 release.

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