2018 ICD-10-CM Diagnosis Code R41.82

Altered mental status, unspecified

Applicable To
  • Change in mental status NOS
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as R41.82. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • altered level of consciousness (
    ICD-10-CM Diagnosis Code R40
    • R40 Somnolence, stupor and coma
      • R40.0 Somnolence
      • R40.1 Stupor
      • R40.2 Coma
        • R40.20 Unspecified coma
        • R40.21 Coma scale, eyes open
          • R40.211 Coma scale, eyes open, never
            • R40.2110 Coma scale, eyes open, never, unspecified tim...
            • R40.2111 Coma scale, eyes open, never, in the field [E...
            • R40.2112 Coma scale, eyes open, never, at arrival to e...
            • R40.2113 Coma scale, eyes open, never, at hospital adm...
            • R40.2114 Coma scale, eyes open, never, 24 hours or mor...
          • R40.212 Coma scale, eyes open, to pain
            • R40.2120 Coma scale, eyes open, to pain, unspecified t...
            • R40.2121 Coma scale, eyes open, to pain, in the field ...
            • R40.2122 Coma scale, eyes open, to pain, at arrival to...
            • R40.2123 Coma scale, eyes open, to pain, at hospital a...
            • R40.2124 Coma scale, eyes open, to pain, 24 hours or m...
          • R40.213 Coma scale, eyes open, to sound
            • R40.2130 Coma scale, eyes open, to sound, unspecified ...
            • R40.2131 Coma scale, eyes open, to sound, in the field...
            • R40.2132 Coma scale, eyes open, to sound, at arrival t...
            • R40.2133 Coma scale, eyes open, to sound, at hospital ...
            • R40.2134 Coma scale, eyes open, to sound, 24 hours or ...
          • R40.214 Coma scale, eyes open, spontaneous
            • R40.2140 Coma scale, eyes open, spontaneous, unspecifi...
            • R40.2141 Coma scale, eyes open, spontaneous, in the fi...
            • R40.2142 Coma scale, eyes open, spontaneous, at arriva...
            • R40.2143 Coma scale, eyes open, spontaneous, at hospit...
            • R40.2144 Coma scale, eyes open, spontaneous, 24 hours ...
        • R40.22 Coma scale, best verbal response
          • R40.221 Coma scale, best verbal response, none
            • R40.2210 Coma scale, best verbal response, none, unspe...
            • R40.2211 Coma scale, best verbal response, none, in th...
            • R40.2212 Coma scale, best verbal response, none, at ar...
            • R40.2213 Coma scale, best verbal response, none, at ho...
            • R40.2214 Coma scale, best verbal response, none, 24 ho...
          • R40.222 Coma scale, best verbal response, incomprehen...
            • R40.2220 Coma scale, best verbal response, incomprehen...
            • R40.2221 Coma scale, best verbal response, incomprehen...
            • R40.2222 Coma scale, best verbal response, incomprehen...
            • R40.2223 Coma scale, best verbal response, incomprehen...
            • R40.2224 Coma scale, best verbal response, incomprehen...
          • R40.223 Coma scale, best verbal response, inappropria...
            • R40.2230 Coma scale, best verbal response, inappropria...
            • R40.2231 Coma scale, best verbal response, inappropria...
            • R40.2232 Coma scale, best verbal response, inappropria...
            • R40.2233 Coma scale, best verbal response, inappropria...
            • R40.2234 Coma scale, best verbal response, inappropria...
          • R40.224 Coma scale, best verbal response, confused co...
            • R40.2240 Coma scale, best verbal response, confused co...
            • R40.2241 Coma scale, best verbal response, confused co...
            • R40.2242 Coma scale, best verbal response, confused co...
            • R40.2243 Coma scale, best verbal response, confused co...
            • R40.2244 Coma scale, best verbal response, confused co...
          • R40.225 Coma scale, best verbal response, oriented
            • R40.2250 Coma scale, best verbal response, oriented, u...
            • R40.2251 Coma scale, best verbal response, oriented, i...
            • R40.2252 Coma scale, best verbal response, oriented, a...
            • R40.2253 Coma scale, best verbal response, oriented, a...
            • R40.2254 Coma scale, best verbal response, oriented, 2...
        • R40.23 Coma scale, best motor response
          • R40.231 Coma scale, best motor response, none
            • R40.2310 Coma scale, best motor response, none, unspec...
            • R40.2311 Coma scale, best motor response, none, in the...
            • R40.2312 Coma scale, best motor response, none, at arr...
            • R40.2313 Coma scale, best motor response, none, at hos...
            • R40.2314 Coma scale, best motor response, none, 24 hou...
          • R40.232 Coma scale, best motor response, extension
            • R40.2320 Coma scale, best motor response, extension, u...
            • R40.2321 Coma scale, best motor response, extension, i...
            • R40.2322 Coma scale, best motor response, extension, a...
            • R40.2323 Coma scale, best motor response, extension, a...
            • R40.2324 Coma scale, best motor response, extension, 2...
          • R40.233 Coma scale, best motor response, abnormal
            • R40.2330 Coma scale, best motor response, abnormal, un...
            • R40.2331 Coma scale, best motor response, abnormal, in...
            • R40.2332 Coma scale, best motor response, abnormal, at...
            • R40.2333 Coma scale, best motor response, abnormal, at...
            • R40.2334 Coma scale, best motor response, abnormal, 24...
          • R40.234 Coma scale, best motor response, flexion with...
            • R40.2340 Coma scale, best motor response, flexion with...
            • R40.2341 Coma scale, best motor response, flexion with...
            • R40.2342 Coma scale, best motor response, flexion with...
            • R40.2343 Coma scale, best motor response, flexion with...
            • R40.2344 Coma scale, best motor response, flexion with...
          • R40.235 Coma scale, best motor response, localizes pa...
            • R40.2350 Coma scale, best motor response, localizes pa...
            • R40.2351 Coma scale, best motor response, localizes pa...
            • R40.2352 Coma scale, best motor response, localizes pa...
            • R40.2353 Coma scale, best motor response, localizes pa...
            • R40.2354 Coma scale, best motor response, localizes pa...
          • R40.236 Coma scale, best motor response, obeys comman...
            • R40.2360 Coma scale, best motor response, obeys comman...
            • R40.2361 Coma scale, best motor response, obeys comman...
            • R40.2362 Coma scale, best motor response, obeys comman...
            • R40.2363 Coma scale, best motor response, obeys comman...
            • R40.2364 Coma scale, best motor response, obeys comman...
        • R40.24 Glasgow coma scale, total score
          • R40.241 Glasgow coma scale score 13-15
            • R40.2410 Glasgow coma scale score 13-15, unspecified t...
            • R40.2411 Glasgow coma scale score 13-15, in the field ...
            • R40.2412 Glasgow coma scale score 13-15, at arrival to...
            • R40.2413 Glasgow coma scale score 13-15, at hospital a...
            • R40.2414 Glasgow coma scale score 13-15, 24 hours or m...
          • R40.242 Glasgow coma scale score 9-12
            • R40.2420 Glasgow coma scale score 9-12, unspecified ti...
            • R40.2421 Glasgow coma scale score 9-12, in the field [...
            • R40.2422 Glasgow coma scale score 9-12, at arrival to ...
            • R40.2423 Glasgow coma scale score 9-12, at hospital ad...
            • R40.2424 Glasgow coma scale score 9-12, 24 hours or mo...
          • R40.243 Glasgow coma scale score 3-8
            • R40.2430 Glasgow coma scale score 3-8, unspecified tim...
            • R40.2431 Glasgow coma scale score 3-8, in the field [E...
            • R40.2432 Glasgow coma scale score 3-8, at arrival to e...
            • R40.2433 Glasgow coma scale score 3-8, at hospital adm...
            • R40.2434 Glasgow coma scale score 3-8, 24 hours or mor...
          • R40.244 Other coma, without documented Glasgow coma s...
            • R40.2440 Other coma, without documented Glasgow coma s...
            • R40.2441 Other coma, without documented Glasgow coma s...
            • R40.2442 Other coma, without documented Glasgow coma s...
            • R40.2443 Other coma, without documented Glasgow coma s...
            • R40.2444 Other coma, without documented Glasgow coma s...
      • R40.3 Persistent vegetative state
      • R40.4 Transient alteration of awareness
    R40.-
    )
  • altered mental status due to known condition - code to condition
  • delirium NOS (
    ICD-10-CM Diagnosis Code R41.0

    Disorientation, unspecified

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Confusion NOS
    • Delirium NOS
    R41.0
    )
The following code(s) above R41.82 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to R41.82:
  • R00-R99
    2018 ICD-10-CM Range R00-R99

    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

    Note
    • This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
    • Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
    • The conditions and signs or symptoms included in categories R00-R94 consist of:
    • (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
    • (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
    • (c) provisional diagnosis in a patient who failed to return for further investigation or care;
    • (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
    • (e) cases in which a more precise diagnosis was not available for any other reason;
    • (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
    Type 2 Excludes
    • abnormal findings on antenatal screening of mother (O28.-)
    • certain conditions originating in the perinatal period (P04-P96)
    • signs and symptoms classified in the body system chapters
    • signs and symptoms of breast (N63, N64.5)
    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
  • R40-R46
    2018 ICD-10-CM Range R40-R46

    Symptoms and signs involving cognition, perception, emotional state and behavior

    Type 2 Excludes
    • symptoms and signs constituting part of a pattern of mental disorder (F01-F99)
    Symptoms and signs involving cognition, perception, emotional state and behavior
  • R41
    ICD-10-CM Diagnosis Code R41

    Other symptoms and signs involving cognitive functions and awareness

      2016 2017 2018 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dissociative [conversion] disorders (F44.-)
    • mild cognitive impairment, so stated (G31.84)
    Other symptoms and signs involving cognitive functions and awareness
Approximate Synonyms ICD-10-CM R41.82 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert R41.82 to ICD-9-CM

Code History
Code annotations containing back-references to R41.82:

Diagnosis Index entries containing back-references to R41.82:

ICD-10-CM Codes Adjacent To R41.82
R40.3 Persistent vegetative state
R40.4 Transient alteration of awareness
R41 Other symptoms and signs involving cognitive functions and awareness
R41.0 Disorientation, unspecified
R41.1 Anterograde amnesia
R41.2 Retrograde amnesia
R41.3 Other amnesia
R41.4 Neurologic neglect syndrome
R41.8 Other symptoms and signs involving cognitive functions and awareness
R41.81 Age-related cognitive decline
R41.82 Altered mental status, unspecified
R41.83 Borderline intellectual functioning
R41.84 Other specified cognitive deficit
R41.840 Attention and concentration deficit
R41.841 Cognitive communication deficit
R41.842 Visuospatial deficit
R41.843 Psychomotor deficit
R41.844 Frontal lobe and executive function deficit
R41.89 Other symptoms and signs involving cognitive functions and awareness
R41.9 Unspecified symptoms and signs involving cognitive functions and awareness
R42 Dizziness and giddiness

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.