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R40 Somnolence, stupor and coma

ICD-10-CM category R40 sits in Chapter 18 (Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified, R00-R99). It contains 101 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.

Subcategories

R40.2 ComaR40.21 Coma scale, eyes openR40.211 Coma scale, eyes open, neverR40.212 Coma scale, eyes open, to painR40.213 Coma scale, eyes open, to soundR40.214 Coma scale, eyes open, spontaneousR40.22 Coma scale, best verbal responseR40.221 Coma scale, best verbal response, noneR40.222 Coma scale, best verbal response, incomprehensible wordsR40.223 Coma scale, best verbal response, inappropriate wordsR40.224 Coma scale, best verbal response, confused conversationR40.225 Coma scale, best verbal response, orientedR40.23 Coma scale, best motor responseR40.231 Coma scale, best motor response, noneR40.232 Coma scale, best motor response, extensionR40.233 Coma scale, best motor response, abnormal flexionR40.234 Coma scale, best motor response, flexion withdrawalR40.235 Coma scale, best motor response, localizes painR40.236 Coma scale, best motor response, obeys commandsR40.24 Glasgow coma scale, total scoreR40.241 Glasgow coma scale score 13-15R40.242 Glasgow coma scale score 9-12R40.243 Glasgow coma scale score 3-8R40.244 Oth coma,w/o Glasgow coma scale score,or w/part score report

Billable codes in R40

CodeDescription
R40.0Somnolence
R40.1Stupor
R40.20Unspecified coma
R40.2110Coma scale, eyes open, never, unspecified time
R40.2111Coma scale, eyes open, never, in the field [EMT or ambulance]
R40.2112Coma scale, eyes open, never, at arrival to emergency department
R40.2113Coma scale, eyes open, never, at hospital admission
R40.2114Coma scale, eyes open, never, 24 hours or more after hospital admission
R40.2120Coma scale, eyes open, to pain, unspecified time
R40.2121Coma scale, eyes open, to pain, in the field [EMT or ambulance]
R40.2122Coma scale, eyes open, to pain, at arrival to emergency department
R40.2123Coma scale, eyes open, to pain, at hospital admission
R40.2124Coma scale, eyes open, to pain, 24 hours or more after hospital admission
R40.2130Coma scale, eyes open, to sound, unspecified time
R40.2131Coma scale, eyes open, to sound, in the field [EMT or ambulance]
R40.2132Coma scale, eyes open, to sound, at arrival to emergency department
R40.2133Coma scale, eyes open, to sound, at hospital admission
R40.2134Coma scale, eyes open, to sound, 24 hours or more after hospital admission
R40.2140Coma scale, eyes open, spontaneous, unspecified time
R40.2141Coma scale, eyes open, spontaneous, in the field [EMT or ambulance]
R40.2142Coma scale, eyes open, spontaneous, at arrival to emergency department
R40.2143Coma scale, eyes open, spontaneous, at hospital admission
R40.2144Coma scale, eyes open, spontaneous, 24 hours or more after hospital admission
R40.2210Coma scale, best verbal response, none, unspecified time
R40.2211Coma scale, best verbal response, none, in the field [EMT or ambulance]
R40.2212Coma scale, best verbal response, none, at arrival to emergency department
R40.2213Coma scale, best verbal response, none, at hospital admission
R40.2214Coma scale, best verbal response, none, 24 hours or more after hospital admission
R40.2220Coma scale, best verbal response, incomprehensible words, unspecified time
R40.2221Coma scale, best verbal response, incomprehensible words, in the field [EMT or ambulance]
R40.2222Coma scale, best verbal response, incomprehensible words, at arrival to emergency department
R40.2223Coma scale, best verbal response, incomprehensible words, at hospital admission
R40.2224Coma scale, best verbal response, incomprehensible words, 24 hours or more after hospital admission
R40.2230Coma scale, best verbal response, inappropriate words, unspecified time
R40.2231Coma scale, best verbal response, inappropriate words, in the field [EMT or ambulance]
R40.2232Coma scale, best verbal response, inappropriate words, at arrival to emergency department
R40.2233Coma scale, best verbal response, inappropriate words, at hospital admission
R40.2234Coma scale, best verbal response, inappropriate words, 24 hours or more after hospital admission
R40.2240Coma scale, best verbal response, confused conversation, unspecified time
R40.2241Coma scale, best verbal response, confused conversation, in the field [EMT or ambulance]
R40.2242Coma scale, best verbal response, confused conversation, at arrival to emergency department
R40.2243Coma scale, best verbal response, confused conversation, at hospital admission
R40.2244Coma scale, best verbal response, confused conversation, 24 hours or more after hospital admission
R40.2250Coma scale, best verbal response, oriented, unspecified time
R40.2251Coma scale, best verbal response, oriented, in the field [EMT or ambulance]
R40.2252Coma scale, best verbal response, oriented, at arrival to emergency department
R40.2253Coma scale, best verbal response, oriented, at hospital admission
R40.2254Coma scale, best verbal response, oriented, 24 hours or more after hospital admission
R40.2310Coma scale, best motor response, none, unspecified time
R40.2311Coma scale, best motor response, none, in the field [EMT or ambulance]
R40.2312Coma scale, best motor response, none, at arrival to emergency department
R40.2313Coma scale, best motor response, none, at hospital admission
R40.2314Coma scale, best motor response, none, 24 hours or more after hospital admission
R40.2320Coma scale, best motor response, extension, unspecified time
R40.2321Coma scale, best motor response, extension, in the field [EMT or ambulance]
R40.2322Coma scale, best motor response, extension, at arrival to emergency department
R40.2323Coma scale, best motor response, extension, at hospital admission
R40.2324Coma scale, best motor response, extension, 24 hours or more after hospital admission
R40.2330Coma scale, best motor response, abnormal flexion, unspecified time
R40.2331Coma scale, best motor response, abnormal flexion, in the field [EMT or ambulance]
R40.2332Coma scale, best motor response, abnormal flexion, at arrival to emergency department
R40.2333Coma scale, best motor response, abnormal flexion, at hospital admission
R40.2334Coma scale, best motor response, abnormal flexion, 24 hours or more after hospital admission
R40.2340Coma scale, best motor response, flexion withdrawal, unspecified time
R40.2341Coma scale, best motor response, flexion withdrawal, in the field [EMT or ambulance]
R40.2342Coma scale, best motor response, flexion withdrawal, at arrival to emergency department
R40.2343Coma scale, best motor response, flexion withdrawal, at hospital admission
R40.2344Coma scale, best motor response, flexion withdrawal, 24 hours or more after hospital admission
R40.2350Coma scale, best motor response, localizes pain, unspecified time
R40.2351Coma scale, best motor response, localizes pain, in the field [EMT or ambulance]
R40.2352Coma scale, best motor response, localizes pain, at arrival to emergency department
R40.2353Coma scale, best motor response, localizes pain, at hospital admission
R40.2354Coma scale, best motor response, localizes pain, 24 hours or more after hospital admission
R40.2360Coma scale, best motor response, obeys commands, unspecified time
R40.2361Coma scale, best motor response, obeys commands, in the field [EMT or ambulance]
R40.2362Coma scale, best motor response, obeys commands, at arrival to emergency department
R40.2363Coma scale, best motor response, obeys commands, at hospital admission
R40.2364Coma scale, best motor response, obeys commands, 24 hours or more after hospital admission
R40.2410Glasgow coma scale score 13-15, unspecified time
R40.2411Glasgow coma scale score 13-15, in the field [EMT or ambulance]
R40.2412Glasgow coma scale score 13-15, at arrival to emergency department
R40.2413Glasgow coma scale score 13-15, at hospital admission
R40.2414Glasgow coma scale score 13-15, 24 hours or more after hospital admission
R40.2420Glasgow coma scale score 9-12, unspecified time
R40.2421Glasgow coma scale score 9-12, in the field [EMT or ambulance]
R40.2422Glasgow coma scale score 9-12, at arrival to emergency department
R40.2423Glasgow coma scale score 9-12, at hospital admission
R40.2424Glasgow coma scale score 9-12, 24 hours or more after hospital admission
R40.2430Glasgow coma scale score 3-8, unspecified time
R40.2431Glasgow coma scale score 3-8, in the field [EMT or ambulance]
R40.2432Glasgow coma scale score 3-8, at arrival to emergency department
R40.2433Glasgow coma scale score 3-8, at hospital admission
R40.2434Glasgow coma scale score 3-8, 24 hours or more after hospital admission
R40.2440Other coma, without documented Glasgow coma scale score, or with partial score reported, unspecified time
R40.2441Other coma, without documented Glasgow coma scale score, or with partial score reported, in the field [EMT or ambulance]
R40.2442Other coma, without documented Glasgow coma scale score, or with partial score reported, at arrival to emergency department
R40.2443Other coma, without documented Glasgow coma scale score, or with partial score reported, at hospital admission
R40.2444Other coma, without documented Glasgow coma scale score, or with partial score reported, 24 hours or more after hospital admission
R40.2ANontraumatic coma due to underlying condition
R40.3Persistent vegetative state
R40.4Transient alteration of awareness

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