R40.2

ICD-10Non-billable category

Coma

Official ICD-10-CM descriptor (FY2026)

Coma

R40.2 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Code first

Sequence the underlying condition before this code.

any associated:
fracture of skull (S02.-)
intracranial injury (S06.-)

Notes

One code from each subcategory, R40.21-R40.23, is required to complete the coma scale

ICD-10-CM FY2026 defines 6 codes beneath R40.2. See the ICD-10-CM index for what this site publishes.

Related codes in R40

Where this code sits

Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)
Parent code: R40

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.