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R40.24

R40.24: Glasgow coma scale, total score

Non-billable headerICD-10-CM

R40.24 is a non-billable header ICD-10-CM code for glasgow coma scale, total score. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The following appropriate 7th character is to be added to subcategory R40.24-:

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

Additional guidance from the ICD-10-CM tabular list.

  • Assign a code from subcategory R40.24, when only the total coma score is documented

Excludes1 inherited from the categories above R40.24

A category’s note binds every code beneath it.

Written on R40: Somnolence, stupor and coma

  • 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)

Other codes that can never be billed with R40.24

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • R41.82Altered mental status, unspecified
  • R40.2ANontraumatic coma due to underlying condition

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead R40.24

4 child codes. Green means billable.

Other codes under R40.2

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.