ICD-10-CM › R00-R99 › R40-R46 › R40.242 Glasgow coma scale score 9-12 › R40.2420

R40.2420

Glasgow coma scale score 9-12, unspecified time

ValidICD-10-CM diagnosis code.

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

Valid FY2017 onwards.

What has happened to this code

Every change the publisher made, from 2017 to now.

  1. FY2017 Added to the code set Glasgow coma scale score 9-12, unspecified time

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.

Codes in the same group

CodeDescriptionStatus
R40.2421 Glasgow coma scale score 9-12, in the field [EMT or ambulance] Valid
R40.2422 Glasgow coma scale score 9-12, at arrival to emergency department Valid
R40.2423 Glasgow coma scale score 9-12, at hospital admission Valid
R40.2424 Glasgow coma scale score 9-12, 24 hours or more after hospital admission Valid