ICD-10 Code for Coma

The ICD-10-CM code for coma is R40.20 — Unspecified coma. This is the code the Alphabetic Index gives for coma with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).

BillableUnspecified

R40.20 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.

Which coma code should you use?

The Alphabetic Index lists 22 codes under Coma. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.

By type

myxedematous	E03.5	Myxedema coma
newborn	P91.5	Neonatal coma
nontraumatic, due to underlying condition	R40.2A	Nontraumatic coma due to underlying condition
persistent vegetative state	R40.3	Persistent vegetative state
secondary	R40.2A	Nontraumatic coma due to underlying condition
specified NEC, without documented Glasgow coma scale score, or with partial Glasgow coma scale score reported	R40.244Not billable	Other coma, without documented Glasgow coma scale score, or with partial score reported

Coma with

motor response	R40.231Not billable	Coma scale, best motor response, none
opening of eyes	R40.211Not billable	Coma scale, eyes open, never
verbal response	R40.221Not billable	Coma scale, best verbal response, none
motor response › abnormal	R40.233Not billable	Coma scale, best motor response, abnormal flexion
motor response › abnormal extensor posturing to pain or noxious stimuli	R40.232Not billable	Coma scale, best motor response, extension
motor response › abnormal flexure posturing to pain or noxious stimuli	R40.233Not billable	Coma scale, best motor response, abnormal flexion
motor response › extension	R40.232Not billable	Coma scale, best motor response, extension
motor response › extensor posturing to pain or noxious stimuli	R40.232Not billable	Coma scale, best motor response, extension
motor response › flexion/decorticate posturing	R40.233Not billable	Coma scale, best motor response, abnormal flexion
motor response › flexion withdrawal	R40.234Not billable	Coma scale, best motor response, flexion withdrawal
motor response › localizes pain	R40.235Not billable	Coma scale, best motor response, localizes pain
motor response › normal or spontaneous movement	R40.236Not billable	Coma scale, best motor response, obeys commands
motor response › obeys commands	R40.236Not billable	Coma scale, best motor response, obeys commands
motor response › withdraws from pain or noxious stimuli	R40.234Not billable	Coma scale, best motor response, flexion withdrawal
motor response › withdraws to touch	R40.235Not billable	Coma scale, best motor response, localizes pain
opening of eyes › spontaneous	R40.214Not billable	Coma scale, eyes open, spontaneous
verbal response › confused conversation	R40.224Not billable	Coma scale, best verbal response, confused conversation
verbal response › cooing or babbling or crying appropriately	R40.225Not billable	Coma scale, best verbal response, oriented
verbal response › inappropriate crying or screaming	R40.223Not billable	Coma scale, best verbal response, inappropriate words
verbal response › inappropriate words	R40.223Not billable	Coma scale, best verbal response, inappropriate words
verbal response › incomprehensible sounds	R40.222Not billable	Coma scale, best verbal response, incomprehensible words
verbal response › incomprehensible words	R40.222Not billable	Coma scale, best verbal response, incomprehensible words
verbal response › irritable cries	R40.224Not billable	Coma scale, best verbal response, confused conversation
verbal response › moans/grunts to pain; restless	R40.222Not billable	Coma scale, best verbal response, incomprehensible words
verbal response › oriented	R40.225Not billable	Coma scale, best verbal response, oriented
verbal response › screaming	R40.223Not billable	Coma scale, best verbal response, inappropriate words
verbal response › uses appropriate words	R40.225Not billable	Coma scale, best verbal response, oriented
motor response › score of › 1	R40.231Not billable	Coma scale, best motor response, none
motor response › score of › 2	R40.232Not billable	Coma scale, best motor response, extension
motor response › score of › 3	R40.233Not billable	Coma scale, best motor response, abnormal flexion
motor response › score of › 4	R40.234Not billable	Coma scale, best motor response, flexion withdrawal
motor response › score of › 5	R40.235Not billable	Coma scale, best motor response, localizes pain
motor response › score of › 6	R40.236Not billable	Coma scale, best motor response, obeys commands
opening of eyes › in response to › pain	R40.212Not billable	Coma scale, eyes open, to pain
opening of eyes › in response to › sound	R40.213Not billable	Coma scale, eyes open, to sound
opening of eyes › score of › 1	R40.211Not billable	Coma scale, eyes open, never
opening of eyes › score of › 2	R40.212Not billable	Coma scale, eyes open, to pain
opening of eyes › score of › 3	R40.213Not billable	Coma scale, eyes open, to sound
opening of eyes › score of › 4	R40.214Not billable	Coma scale, eyes open, spontaneous
verbal response › score of › 1	R40.221Not billable	Coma scale, best verbal response, none
verbal response › score of › 2	R40.222Not billable	Coma scale, best verbal response, incomprehensible words
verbal response › score of › 3	R40.223Not billable	Coma scale, best verbal response, inappropriate words
verbal response › score of › 4	R40.224Not billable	Coma scale, best verbal response, confused conversation
verbal response › score of › 5	R40.225Not billable	Coma scale, best verbal response, oriented

Coma hypoglycemic

nondiabetic

E15

Nondiabetic hypoglycemic coma

Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources