R40.2 - Coma

Applicable to Coma
The 2025 edition of ICD10-CM R40.2 became effective on October 1, 2024.
This is the American ICD10-CM version of R40.2 - other international versions of ICD10 R40.2 may differ.
R40.2 is a Non-Billable / Non-Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
R40.2 Code should not be used for billing or reimbursement purposes as there are multiple ICD-10 CM codes below it that contain a greater level of detail.

R40.2 - Coma
- 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
- R40.2A - Nontraumatic coma due to underlying condition

Code Notes

One code from each subcategory, R40.21-R40.23, is required to complete the coma scale

codefirst

any associated:
fracture of skull (S02.-)
intracranial injury (S06.-)

The following codes above R40.2 contain annotation back-references that may be applicable to R40.2:

Chapter: R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

Section: R40-R46 Symptoms and signs involving cognition, perception, emotional state and behavior

Category: R40 Somnolence, stupor and coma

somnolence icd 10

laboratory icd 10

findings icd 10

behavior icd 10

cognition icd 10

clinical icd 10

emotional icd 10

abnormal icd 10

perception icd 10

Non-Billable/Non-Specific Code

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Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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