R40.2134 – Coma scale, eyes open, to sound, 24 hours or more after hospital admission

ICD-10-CM 2027 diagnosis code · Symptoms and signs involving cognition, perception, emotional state and behavior

Billable code

ICD-10-CM code R40.2134

Code: R40.2134 (claims format: R402134)
Description: Coma scale, eyes open, to sound, 24 hours or more after hospital admission
Short description: Coma scale, eyes open, to sound, 24+hrs
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: R40-R46 Symptoms and signs involving cognition, perception, emotional state and behavior
Parent codes: R40 › R40.2 › R40.21 › R40.213

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`0`	unspecified time
`1`	in the field [EMT or ambulance]
`2`	at arrival to emergency department
`3`	at hospital admission
`4`	24 hours or more after hospital admission

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

R40 – Somnolence, stupor and coma

Excludes1 (not coded here):

neonatal coma (P91.5)
somnolence, stupor and coma in diabetes (E08-E13)
somnolence, stupor and coma in hepatic failure (K72.-)
somnolence, stupor and coma in hypoglycemia (nondiabetic) (E15)

R40.2 – Coma

Code first:

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

Notes:

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

R40.21 – Coma scale, eyes open

7th character note:

The following appropriate 7th character is to be added to subcategory R40.21-:

R40.213 – Coma scale, eyes open, to sound

Applicable to:

Coma scale eye opening score of 3

Block R40-R46

Excludes2 (not included here):

symptoms and signs constituting part of a pattern of mental disorder (F01-F99)

Related codes in R40.213

Frequently asked questions

What is ICD-10 code R40.2134?

R40.2134 is the ICD-10-CM code for coma scale, eyes open, to sound, 24 hours or more after hospital admission, in the block R40-R46 (Symptoms and signs involving cognition, perception, emotional state and behavior).

Is R40.2134 a billable code?

Yes. R40.2134 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R40.2134 belong to?

It belongs to category R40 – Somnolence, stupor and coma.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.