2,667 codes
Unacceptable principal diagnosis codes
Codes that describe a circumstance influencing health status rather than a current illness, so they are unacceptable as the principal diagnosis for an inpatient stay. Source: Medicare Code Editor (MCE) v44, effective October 1, 2026.
Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
- R05.4Cough syncope
- R18.0Malignant ascites
- R29.700NIHSS score 0
- R29.701NIHSS score 1
- R29.702NIHSS score 2
- R29.703NIHSS score 3
- R29.704NIHSS score 4
- R29.705NIHSS score 5
- R29.706NIHSS score 6
- R29.707NIHSS score 7
- R29.708NIHSS score 8
- R29.709NIHSS score 9
- R29.710NIHSS score 10
- R29.711NIHSS score 11
- R29.712NIHSS score 12
- R29.713NIHSS score 13
- R29.714NIHSS score 14
- R29.715NIHSS score 15
- R29.716NIHSS score 16
- R29.717NIHSS score 17
- R29.718NIHSS score 18
- R29.719NIHSS score 19
- R29.720NIHSS score 20
- R29.721NIHSS score 21
- R29.722NIHSS score 22
- R29.723NIHSS score 23
- R29.724NIHSS score 24
- R29.725NIHSS score 25
- R29.726NIHSS score 26
- R29.727NIHSS score 27
- R29.728NIHSS score 28
- R29.729NIHSS score 29
- R29.730NIHSS score 30
- R29.731NIHSS score 31
- R29.732NIHSS score 32
- R29.733NIHSS score 33
- R29.734NIHSS score 34
- R29.735NIHSS score 35
- R29.736NIHSS score 36
- R29.737NIHSS score 37
- R29.738NIHSS score 38
- R29.739NIHSS score 39
- R29.740NIHSS score 40
- R29.741NIHSS score 41
- R29.742NIHSS score 42
- 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
- R41.83Borderline intellectual functioning
- R45.850Homicidal ideations
- R46.81Obsessive-compulsive behavior
- R46.89Other symptoms and signs involving appearance and behavior
- R65.10Systemic inflammatory response syndrome (SIRS) of non-infectious origin without acute organ dysfunction
- R65.11Systemic inflammatory response syndrome (SIRS) of non-infectious origin with acute organ dysfunction
- R65.20Severe sepsis without septic shock
- R65.21Severe sepsis with septic shock