2023 ICD-10-CM Diagnosis Code G31.84

New Call-to-action

Mild cognitive impairment of uncertain or unknown etiology

    2016 2017 2018 2019 2020 2021 2022 2023 - Revised Code Billable/Specific Code
  • G31.84 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • ICD-10-CM G31.84 is a revised 2023 ICD-10-CM code that became effective on October 1, 2022.
  • This is the American ICD-10-CM version of G31.84 - other international versions of ICD-10 G31.84 may differ.
Applicable To
  • Mild cognitive disorder NOS
  • Mild neurocognitive disorder of uncertain or unknown etiology
Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code to identify presence of:
  • alcohol abuse and dependence (
    ICD-10-CM Diagnosis Code F10
    • F10 Alcohol related disorders
      • F10.1 Alcohol abuse
        • F10.10 …… uncomplicated
        • F10.11 …… in remission
        • F10.12 Alcohol abuse with intoxication
          • F10.120 Alcohol abuse with intoxication, uncomplicate...
          • F10.121 …… delirium
          • F10.129 …… unspecified
        • F10.13 Alcohol abuse, with withdrawal
          • F10.130 Alcohol abuse with withdrawal, uncomplicated
          • F10.131 Alcohol abuse with withdrawal delirium
          • F10.132 Alcohol abuse with withdrawal with perceptual...
          • F10.139 Alcohol abuse with withdrawal, unspecified
        • F10.14 Alcohol abuse with alcohol-induced mood disor...
        • F10.15 Alcohol abuse with alcohol-induced psychotic ...
          • F10.150 Alcohol abuse with alcohol-induced psychotic ...
          • F10.151 Alcohol abuse with alcohol-induced psychotic ...
          • F10.159 Alcohol abuse with alcohol-induced psychotic ...
        • F10.18 Alcohol abuse with other alcohol-induced diso...
          • F10.180 Alcohol abuse with alcohol-induced anxiety di...
          • F10.181 Alcohol abuse with alcohol-induced sexual dys...
          • F10.182 Alcohol abuse with alcohol-induced sleep diso...
          • F10.188 Alcohol abuse with other alcohol-induced diso...
        • F10.19 Alcohol abuse with unspecified alcohol-induce...
      • F10.2 Alcohol dependence
        • F10.20 …… uncomplicated
        • F10.21 …… in remission
        • F10.22 Alcohol dependence with intoxication
          • F10.220 Alcohol dependence with intoxication, uncompl...
          • F10.221 Alcohol dependence with intoxication delirium...
          • F10.229 Alcohol dependence with intoxication, unspeci...
        • F10.23 Alcohol dependence with withdrawal
          • F10.230 Alcohol dependence with withdrawal, uncomplic...
          • F10.231 …… delirium
          • F10.232 Alcohol dependence with withdrawal with perce...
          • F10.239 Alcohol dependence with withdrawal, unspecifi...
        • F10.24 Alcohol dependence with alcohol-induced mood ...
        • F10.25 Alcohol dependence with alcohol-induced psych...
          • F10.250 Alcohol dependence with alcohol-induced psych...
          • F10.251 Alcohol dependence with alcohol-induced psych...
          • F10.259 Alcohol dependence with alcohol-induced psych...
        • F10.26 Alcohol dependence with alcohol-induced persi...
        • F10.27 Alcohol dependence with alcohol-induced persi...
        • F10.28 Alcohol dependence with other alcohol-induced...
          • F10.280 Alcohol dependence with alcohol-induced anxie...
          • F10.281 Alcohol dependence with alcohol-induced sexua...
          • F10.282 Alcohol dependence with alcohol-induced sleep...
          • F10.288 Alcohol dependence with other alcohol-induced...
        • F10.29 Alcohol dependence with unspecified alcohol-i...
      • F10.9 Alcohol use, unspecified
        • F10.90 …… uncomplicated
        • F10.91 …… in remission
        • F10.92 Alcohol use, unspecified with intoxication
          • F10.920 Alcohol use, unspecified with intoxication, u...
          • F10.921 Alcohol use, unspecified with intoxication de...
          • F10.929 Alcohol use, unspecified with intoxication, u...
        • F10.93 Alcohol use, unspecified with withdrawal
          • F10.930 Alcohol use, unspecified with withdrawal, unc...
          • F10.931 Alcohol use, unspecified with withdrawal deli...
          • F10.932 Alcohol use, unspecified with withdrawal with...
          • F10.939 Alcohol use, unspecified with withdrawal, uns...
        • F10.94 Alcohol use, unspecified with alcohol-induced...
        • F10.95 Alcohol use, unspecified with alcohol-induced...
          • F10.950 Alcohol use, unspecified with alcohol-induced...
          • F10.951 Alcohol use, unspecified with alcohol-induced...
          • F10.959 Alcohol use, unspecified with alcohol-induced...
        • F10.96 Alcohol use, unspecified with alcohol-induced...
        • F10.97 Alcohol use, unspecified with alcohol-induced...
        • F10.98 Alcohol use, unspecified with other alcohol-i...
          • F10.980 Alcohol use, unspecified with alcohol-induced...
          • F10.981 Alcohol use, unspecified with alcohol-induced...
          • F10.982 Alcohol use, unspecified with alcohol-induced...
          • F10.988 Alcohol use, unspecified with other alcohol-i...
        • F10.99 Alcohol use, unspecified with unspecified alc...
    F10.-
    )
  • exposure to environmental tobacco smoke (
    ICD-10-CM Diagnosis Code Z77.22

    Contact with and (suspected) exposure to environmental tobacco smoke (acute) (chronic)

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Exposure to second hand tobacco smoke (acute) (chronic)
    • Passive smoking (acute) (chronic)
    Type 1 Excludes
    Type 2 Excludes
    • occupational exposure to environmental tobacco smoke (Z57.31)
    Z77.22
    )
  • history of tobacco dependence (
    ICD-10-CM Diagnosis Code Z87.891

    Personal history of nicotine dependence

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
    Type 1 Excludes
    • current nicotine dependence (F17.2-)
    Z87.891
    )
  • hypertension (I10-I16
    ICD-10-CM Range I10-I16

    Hypertensive diseases

    Type 1 Excludes
    • neonatal hypertension (P29.2)
    • primary pulmonary hypertension (I27.0)
    Type 2 Excludes
    • hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)
    Use Additional
    • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    • I10 Essential (primary) hypertension
    • I11 Hypertensive heart disease
    • I12 Hypertensive chronic kidney disease
    • I13 Hypertensive heart and chronic kidney di...
    • I15 Secondary hypertension
    • I16 Hypertensive crisis
    )
  • occupational exposure to environmental tobacco smoke (
    ICD-10-CM Diagnosis Code Z57.31

    Occupational exposure to environmental tobacco smoke

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
    Type 2 Excludes
    • exposure to environmental tobacco smoke (Z77.22)
    Z57.31
    )
  • tobacco dependence (
    ICD-10-CM Diagnosis Code F17
    • F17 Nicotine dependence
      • F17.2 Nicotine dependence
        • F17.20 Nicotine dependence, unspecified
          • F17.200 Nicotine dependence, unspecified, uncomplicat...
          • F17.201 Nicotine dependence, unspecified, in remissio...
          • F17.203 Nicotine dependence unspecified, with withdra...
          • F17.208 Nicotine dependence, unspecified, with other ...
          • F17.209 Nicotine dependence, unspecified, with unspec...
        • F17.21 Nicotine dependence, cigarettes
          • F17.210 Nicotine dependence, cigarettes, uncomplicate...
          • F17.211 Nicotine dependence, cigarettes, in remission...
          • F17.213 Nicotine dependence, cigarettes, with withdra...
          • F17.218 Nicotine dependence, cigarettes, with other n...
          • F17.219 Nicotine dependence, cigarettes, with unspeci...
        • F17.22 Nicotine dependence, chewing tobacco
          • F17.220 Nicotine dependence, chewing tobacco, uncompl...
          • F17.221 Nicotine dependence, chewing tobacco, in remi...
          • F17.223 Nicotine dependence, chewing tobacco, with wi...
          • F17.228 Nicotine dependence, chewing tobacco, with ot...
          • F17.229 Nicotine dependence, chewing tobacco, with un...
        • F17.29 Nicotine dependence, other tobacco product
          • F17.290 Nicotine dependence, other tobacco product, u...
          • F17.291 Nicotine dependence, other tobacco product, i...
          • F17.293 Nicotine dependence, other tobacco product, w...
          • F17.298 Nicotine dependence, other tobacco product, w...
          • F17.299 Nicotine dependence, other tobacco product, w...
    F17.-
    )
  • tobacco use (
    ICD-10-CM Diagnosis Code Z72.0

    Tobacco use

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code POA Exempt
    Applicable To
    • Tobacco use NOS
    Type 1 Excludes
    • history of tobacco dependence (Z87.891)
    • nicotine dependence (F17.2-)
    • tobacco dependence (F17.2-)
    • tobacco use during pregnancy (O99.33-)
    Z72.0
    )
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 G31.84. 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.
  • age related cognitive decline (
    ICD-10-CM Diagnosis Code R41.81

    Age-related cognitive decline

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Adult Dx (15-124 years)
    Applicable To
    • Senility NOS
    R41.81
    )
  • altered mental status (
    ICD-10-CM Diagnosis Code R41.82

    Altered mental status, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Change in mental status NOS
    Type 1 Excludes
    • altered level of consciousness (R40.-)
    • altered mental status due to known condition - code to condition
    • delirium NOS (R41.0)
    R41.82
    )
  • cerebral degeneration (
    ICD-10-CM Diagnosis Code G31.9

    Degenerative disease of nervous system, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    G31.9
    )
  • cerebrovascular diseases (I60-I69
    ICD-10-CM Range I60-I69

    Cerebrovascular diseases

    Type 1 Excludes
    • traumatic intracranial hemorrhage (S06.-)
    Use Additional
    • code to identify presence of:
    • alcohol abuse and dependence (F10.-)
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • hypertension (I10-I16)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    • I60 Nontraumatic subarachnoid hemorrhage
    • I61 Nontraumatic intracerebral hemorrhage
    • I62 Other and unspecified nontraumatic intra...
    • I63 Cerebral infarction
    • I65 Occlusion and stenosis of precerebral ar...
    • I66 Occlusion and stenosis of cerebral arter...
    • I67 Other cerebrovascular diseases
    • I68 Cerebrovascular disorders in diseases cl...
    • I69 Sequelae of cerebrovascular disease
    )
  • change in mental status (
    ICD-10-CM Diagnosis Code R41.82

    Altered mental status, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Change in mental status NOS
    Type 1 Excludes
    • altered level of consciousness (R40.-)
    • altered mental status due to known condition - code to condition
    • delirium NOS (R41.0)
    R41.82
    )
  • cognitive deficits following (sequelae of) cerebral hemorrhage or infarction (
    ICD-10-CM Diagnosis Code I69.01

    Cognitive deficits following nontraumatic subarachnoid hemorrhage

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    I69.01-
    ,
    ICD-10-CM Diagnosis Code I69.11

    Cognitive deficits following nontraumatic intracerebral hemorrhage

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    I69.11-
    ,
    ICD-10-CM Diagnosis Code I69.21

    Cognitive deficits following other nontraumatic intracranial hemorrhage

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    I69.21-
    ,
    ICD-10-CM Diagnosis Code I69.31

    Cognitive deficits following cerebral infarction

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    I69.31-
    ,
    ICD-10-CM Diagnosis Code I69.81

    Cognitive deficits following other cerebrovascular disease

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    I69.81-
    ,
    ICD-10-CM Diagnosis Code I69.91

    Cognitive deficits following unspecified cerebrovascular disease

      2016 2017 - Converted to Parent Code 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    I69.91-
    )
  • cognitive impairment due to intracranial or head injury (
    ICD-10-CM Diagnosis Code S06
    • S06.0 Concussion
    • S06.1 Traumatic cerebral edema
    • S06.2 Diffuse traumatic brain injury
    • S06.3 Focal traumatic brain injury
    • S06.4 Epidural hemorrhage
    • S06.5 Traumatic subdural hemorrhage
    • S06.6 Traumatic subarachnoid hemorrhage
    • S06.8 Other specified intracranial injuries
    • S06.9 Unspecified intracranial injury
    • S06.A Traumatic brain compression and herniation
    S06.-
    )
  • dementia (
    ICD-10-CM Diagnosis Code F01
    • F01 Vascular dementia
      • F01.5 Vascular dementia, unspecified severity
        • F01.50 Vascular dementia, unspecified severity, with...
        • F01.51 Vascular dementia, unspecified severity, with...
          • F01.511 Vascular dementia, unspecified severity, with...
          • F01.518 Vascular dementia, unspecified severity, with...
        • F01.52 Vascular dementia, unspecified severity, with...
        • F01.53 Vascular dementia, unspecified severity, with...
        • F01.54 Vascular dementia, unspecified severity, with...
      • F01.A Vascular dementia, mild
        • F01.A0 Vascular dementia, mild, without behavioral d...
        • F01.A1 Vascular dementia, mild, with behavioral dist...
          • F01.A11 Vascular dementia, mild, with agitation
          • F01.A18 Vascular dementia, mild, with other behaviora...
        • F01.A2 Vascular dementia, mild, with psychotic distu...
        • F01.A3 Vascular dementia, mild, with mood disturbanc...
        • F01.A4 …… with anxiety
      • F01.B Vascular dementia, moderate
        • F01.B0 Vascular dementia, moderate, without behavior...
        • F01.B1 Vascular dementia, moderate, with behavioral ...
          • F01.B11 Vascular dementia, moderate, with agitation
          • F01.B18 Vascular dementia, moderate, with other behav...
        • F01.B2 Vascular dementia, moderate, with psychotic d...
        • F01.B3 Vascular dementia, moderate, with mood distur...
        • F01.B4 …… with anxiety
      • F01.C Vascular dementia, severe
        • F01.C0 Vascular dementia, severe, without behavioral...
        • F01.C1 Vascular dementia, severe, with behavioral di...
          • F01.C11 Vascular dementia, severe, with agitation
          • F01.C18 Vascular dementia, severe, with other behavio...
        • F01.C2 Vascular dementia, severe, with psychotic dis...
        • F01.C3 Vascular dementia, severe, with mood disturba...
        • F01.C4 …… with anxiety
    F01.-
    ,
    ICD-10-CM Diagnosis Code F02
    • F02 Dementia in other diseases classified elsewhe...
      • F02.8 Dementia in other diseases classified elsewhe...
        • F02.80 Dementia in other diseases classified elsewhe...
        • F02.81 Dementia in other diseases classified elsewhe...
          • F02.811 Dementia in other diseases classified elsewhe...
          • F02.818 Dementia in other diseases classified elsewhe...
        • F02.82 Dementia in other diseases classified elsewhe...
        • F02.83 Dementia in other diseases classified elsewhe...
        • F02.84 Dementia in other diseases classified elsewhe...
      • F02.A Dementia in other diseases classified elsewhe...
        • F02.A0 Dementia in other diseases classified elsewhe...
        • F02.A1 Dementia in other diseases classified elsewhe...
          • F02.A11 Dementia in other diseases classified elsewhe...
          • F02.A18 Dementia in other diseases classified elsewhe...
        • F02.A2 Dementia in other diseases classified elsewhe...
        • F02.A3 Dementia in other diseases classified elsewhe...
        • F02.A4 Dementia in other diseases classified elsewhe...
      • F02.B Dementia in other diseases classified elsewhe...
        • F02.B0 Dementia in other diseases classified elsewhe...
        • F02.B1 Dementia in other diseases classified elsewhe...
          • F02.B11 Dementia in other diseases classified elsewhe...
          • F02.B18 Dementia in other diseases classified elsewhe...
        • F02.B2 Dementia in other diseases classified elsewhe...
        • F02.B3 Dementia in other diseases classified elsewhe...
        • F02.B4 Dementia in other diseases classified elsewhe...
      • F02.C Dementia in other diseases classified elsewhe...
        • F02.C0 Dementia in other diseases classified elsewhe...
        • F02.C1 Dementia in other diseases classified elsewhe...
          • F02.C11 Dementia in other diseases classified elsewhe...
          • F02.C18 Dementia in other diseases classified elsewhe...
        • F02.C2 Dementia in other diseases classified elsewhe...
        • F02.C3 Dementia in other diseases classified elsewhe...
        • F02.C4 Dementia in other diseases classified elsewhe...
    F02.-
    ,
    ICD-10-CM Diagnosis Code F03

    Unspecified dementia

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Applicable To
    • Major neurocognitive disorder NOS
    • Presenile dementia NOS
    • Presenile psychosis NOS
    • Primary degenerative dementia NOS
    • Senile dementia NOS
    • Senile dementia depressed or paranoid type
    • Senile psychosis NOS
    Type 1 Excludes
    Type 2 Excludes
    • mild memory disturbance due to known physiological condition (F06.8)
    • senile dementia with delirium or acute confusional state (F05)
    F03
    )
  • mild neurocognitive disorder due to a known physiological condition (
    ICD-10-CM Diagnosis Code F06.7

    Mild neurocognitive disorder due to known physiological condition

      2023 - New Code Non-Billable/Non-Specific Code
    Applicable To
    • Mild neurocognitive impairment due to a known physiological condition
    Code First
    • the underlying physiological condition, such as:
    • Alzheimer's disease (G30.-)
    • frontotemporal neurocognitive disorder (G31.09)
    • human immunodeficiency virus [HIV] disease (B20)
    • Huntington's disease (G10)
    • Neurocognitive disorder with Lewy bodies (G31.83)
    • Parkinson's disease (G20)
    • systemic lupus erythematosus (M32.-)
    • traumatic brain injury (S06.-)
    • vitamin B deficiency (E53-)
    Type 1 Excludes
    F06.7-
    )
  • neurologic neglect syndrome (
    ICD-10-CM Diagnosis Code R41.4

    Neurologic neglect syndrome

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Asomatognosia
    • Hemi-akinesia
    • Hemi-inattention
    • Hemispatial neglect
    • Left-sided neglect
    • Sensory neglect
    • Visuospatial neglect
    Type 1 Excludes
    R41.4
    )
  • personality change, nonpsychotic (
    ICD-10-CM Diagnosis Code F68.8

    Other specified disorders of adult personality and behavior

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    F68.8
    )
The following code(s) above G31.84 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 G31.84:
  • G00-G99
    2023 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G31
    ICD-10-CM Diagnosis Code G31

    Other degenerative diseases of nervous system, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Use Additional
    Other degenerative diseases of nervous system, not elsewhere classified
Approximate Synonyms
  • Cognitive impairment due to human immunodeficiency virus infection
  • Hiv related cognitive impairment
  • Mild cognitive impairment
  • Mild cognitive impairment, so stated
  • Mild neurocognitive disorder co-occurrent and due to alzheimer's disease
  • Mild neurocognitive disorder co-occurrent and due to frontotemporal lobar degeneration
  • Mild neurocognitive disorder co-occurrent and due to human immunodeficiency virus infection
  • Mild neurocognitive disorder co-occurrent and due to huntington's disease
  • Mild neurocognitive disorder co-occurrent and due to lewy body disease
  • Mild neurocognitive disorder co-occurrent and due to multiple etiologies
  • Mild neurocognitive disorder co-occurrent and due to parkinson's disease
  • Mild neurocognitive disorder co-occurrent and due to prion disease
  • Mild neurocognitive disorder co-occurrent and due to traumatic brain injury
  • Mild neurocognitive disorder due to alzheimers disease
  • Mild neurocognitive disorder due to frontotemporal lobar degeneration
  • Mild neurocognitive disorder due to hiv infection
  • Mild neurocognitive disorder due to huntingtons disease
  • Mild neurocognitive disorder due to lewy body disease
  • Mild neurocognitive disorder due to multiple etiologies
  • Mild neurocognitive disorder due to parkinsons disease
  • Mild neurocognitive disorder due to prion disease
  • Mild neurocognitive disorder due to traumatic brain injury
  • Minimal cognitive impairment
ICD-10-CM G31.84 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
  • 056 Degenerative nervous system disorders with mcc
  • 057 Degenerative nervous system disorders without mcc

Convert G31.84 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): Revised code
    • New description: Mild cognitive impairment of uncertain or unknown etiology
    • 2022 description: Mild cognitive impairment, so stated
Code annotations containing back-references to G31.84:
  • Type 1 Excludes: R41
    , F06.7
    , F07.0
    ICD-10-CM Diagnosis Code R41

    Other symptoms and signs involving cognitive functions and awareness

      2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • dissociative [conversion] disorders (F44.-)
    • mild cognitive impairment, so stated (G31.84)
    ICD-10-CM Diagnosis Code F06.7

    Mild neurocognitive disorder due to known physiological condition

      2023 - New Code Non-Billable/Non-Specific Code
    Applicable To
    • Mild neurocognitive impairment due to a known physiological condition
    Code First
    • the underlying physiological condition, such as:
    • Alzheimer's disease (G30.-)
    • frontotemporal neurocognitive disorder (G31.09)
    • human immunodeficiency virus [HIV] disease (B20)
    • Huntington's disease (G10)
    • Neurocognitive disorder with Lewy bodies (G31.83)
    • Parkinson's disease (G20)
    • systemic lupus erythematosus (M32.-)
    • traumatic brain injury (S06.-)
    • vitamin B deficiency (E53-)
    Type 1 Excludes
    ICD-10-CM Diagnosis Code F07.0

    Personality change due to known physiological condition

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    Applicable To
    • Frontal lobe syndrome
    • Limbic epilepsy personality syndrome
    • Lobotomy syndrome
    • Organic personality disorder
    • Organic pseudopsychopathic personality
    • Organic pseudoretarded personality
    • Postleucotomy syndrome
    Type 1 Excludes
    • mild cognitive impairment (G31.84)
    • postconcussional syndrome (F07.81)
    • postencephalitic syndrome (F07.89)
    • signs and symptoms involving emotional state (R45.-)
    Type 2 Excludes
    • specific personality disorder (F60.-)

Diagnosis Index entries containing back-references to G31.84:

ICD-10-CM Codes Adjacent To G31.84
G31 Other degenerative diseases of nervous system, not elsewhere classified
G31.0 Frontotemporal dementia
G31.01 Pick's disease
G31.09 Other frontotemporal neurocognitive disorder
G31.1 Senile degeneration of brain, not elsewhere classified
G31.2 Degeneration of nervous system due to alcohol
G31.8 Other specified degenerative diseases of nervous system
G31.81 Alpers disease
G31.82 Leigh's disease
G31.83 Neurocognitive disorder with Lewy bodies
G31.84 Mild cognitive impairment of uncertain or unknown etiology
G31.85 Corticobasal degeneration
G31.89 Other specified degenerative diseases of nervous system
G31.9 Degenerative disease of nervous system, unspecified
G32 Other degenerative disorders of nervous system in diseases classified elsewhere
G32.0 Subacute combined degeneration of spinal cord in diseases classified elsewhere
G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere
G32.81 Cerebellar ataxia in diseases classified elsewhere
G32.89 Other specified degenerative disorders of nervous system in diseases classified elsewhere
G35 Multiple sclerosis
G36 Other acute disseminated demyelination

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