Nontraumatic coma due to underlying condition

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2024 onwards.

What has happened to this code

Every change the publisher made, from 2024 to now.

FY2024 Added to the code set Nontraumatic coma due to underlying condition

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from R40 Somnolence, stupor and coma

Excludes1 - never 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)

Inherited from the R40-R46 section Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)

Excludes2 - not included here

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

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Comatose
Unconscious
Symptoms NEC > involving > awareness > coma
Symptoms NEC > involving > cognitive functions > coma
Coma > secondary
Coma > nontraumatic, due to underlying condition

Codes in the same group

Code	Description	Status
R40.20	Unspecified coma	Valid
R40.21	Coma scale, eyes open	Not billable
R40.22	Coma scale, best verbal response	Not billable
R40.23	Coma scale, best motor response	Not billable
R40.24	Glasgow coma scale, total score	Not billable