R40.2343 Coma scale, best motor response, flexion withdrawal, at hospital admission

ICD-10-CM Code R40.2343: Coma Scale, Best Motor Response, Flexion Withdrawal, at Hospital Admission

ICD-10-CM code R40.2343 is an active, billable terminology record designating the coma scale finding for best motor response, flexion withdrawal, at hospital admission. It is classified under the semantic type of finding and is situated within a broader coding hierarchy for coma scale assessments. 1 6

Plain-language overview

The Glasgow Coma Scale offers an objective method for describing the extent of impaired consciousness in patients with acute medical conditions or trauma by evaluating eye, verbal, and motor responsiveness. 2

What this code represents

The concept R40.2343 is an active terminology record classified under the semantic type of finding, specifically detailing flexion withdrawal during best motor response assessment at hospital admission. 1

The parent concept for this specific code is R40.234, which broadly encompasses the coma scale measurement for best motor response and flexion withdrawal without the admission timing modifier. 1

Coding details

Code R40.2343 is explicitly designated as a billable diagnosis code within the ICD-10-CM coding system, allowing it to be used for billing and coding purposes. 6

Distinct from R40.2343, related codes in the same series capture flexion withdrawal at different assessment times, including in the field or twenty-four hours or more after hospital admission. 5

Documentation considerations

Proper documentation of this finding involves evaluating the motor response parameter of responsiveness, which is often the most challenging component to interpret when distinguishing between withdrawal and abnormal flexion. 2

Coverage and utilization context

The specific coma scale code R40.2343 appears listed within a Medicare billing and coding article for somatosensory testing alongside the related code for flexion withdrawal twenty-four hours after admission. 4

What the sources add

While the terminology record defines the code's hierarchical structure and active status, a clinical reference adds context by explaining that the underlying scale evaluates eye, verbal, and motor responsiveness. 1 2

Multiple code lists include R40.2343 among related motor response concepts, placing it after abnormal flexion codes and before later timed withdrawal codes. 3 5

Sources

1. ICD-10-CM R40.2343 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 · ExPRSweb — csg.sph.umich.edu; accessed 2026-07-27.
4. Article - Billing and Coding: Somatosensory Testing (A56769) — cms.gov; accessed 2026-07-27.
5. MVP G0057/Adopting Best Practices and Promoting Patient Safety with Emergency Medicine: Glasgow Coma Scale Score Documentation & Coding | iQueryData.com — iquerydata.com; accessed 2026-07-27.
6. Codigo. The #1 Billing Agency for Medical Practices — codigo.care; accessed 2026-07-27.