R40.2412 Glasgow coma scale score 13-15, at arrival to emergency department

ICD-10-CM Code R40.2412: Glasgow coma scale score 13-15, at arrival to emergency department

ICD-10-CM code R40.2412 represents the finding of a Glasgow coma scale score between 13 and 15 specifically documented at a patient's arrival to the emergency department. The Glasgow coma scale is an objective clinical tool used to evaluate impaired consciousness by assessing eye, verbal, and motor responsiveness in trauma and emergency settings. 1 2 5

Plain-language overview

The Glasgow Coma Scale is a clinical system used by healthcare providers to measure decreases in consciousness by scoring three categories of a neurological exam and adding them together. 5

The Glasgow Coma Scale evaluates three aspects of responsiveness, including eye-opening, verbal, and motor responses, to provide an objective method for describing the extent of impaired consciousness. 2

What this code represents

ICD-10-CM code R40.2412 is an active terminology concept representing the finding of a Glasgow coma scale score of 13-15 at arrival to the emergency department. 1

Code R40.2412 is a narrower concept under the parent concept R40.241, which designates a Glasgow coma scale score of 13-15 without the emergency department arrival specification. 1

Coding details

Code R40.2412 is distinct from code R40.2413, which designates a Glasgow coma scale score of 13-15 at hospital admission rather than at arrival to the emergency department. 4

Code R40.2412 is listed alongside other emergency department arrival coma scale findings, including scores of 9-12 and scores of 3-8, within broader phenotype mapping resources. 3

Documentation considerations

The Glasgow Coma Scale allows providers in multiple settings and with varying levels of training to communicate succinctly about a patient's mental status based on eye, verbal, and motor criteria. 6

What the sources add

While terminology records define the exact code R40.2412, clinical references establish that the Glasgow Coma Scale is a widely adopted tool in trauma, critical care, and emergency settings for acute brain injury assessment. 1 2

Sources

1. ICD-10-CM R40.2412 terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Phecode 348.7 · Cancer PRSweb — csg.sph.umich.edu; accessed 2026-07-27.
4. Article - Billing and Coding: Somatosensory Testing (A56769) — cms.gov; accessed 2026-07-27.
5. The Glasgow Coma Scale and how experts use it — my.clevelandclinic.org; accessed 2026-07-27.
6. Glasgow Coma Scale — ebmedicine.net; accessed 2026-07-27.