G31.84 MILD COGNITIVE IMPAIRMENT OF UNCERTAIN OR UNKNOWN ETIOLOGY

Code Information

  • Diagnosis Code: G31.84
  • Short Description: Mild cognitive impairment of uncertain or unknown etiology
  • Long Description: Mild cognitive impairment of uncertain or unknown etiology
  • Code Version: 2025 ICD-10-CM

The code G31.84 is VALID for claim submission

Code Classification

Synonyms

  • Amnestic mild cognitive disorder
  • Mild neurocognitive disorder
  • Neurocognitive disorder
  • Neurocognitive disorder

References to Index of Diseases and Injuries

The code G31.84 has the following ICD-10-CM references to the Index of Diseases and Injuries

  • Inclusion Terms:
    • Mild cognitive disorder NOS
    • Mild neurocognitive disorder of uncertain or unknown etiology
  • Type 1 Excludes Notes:
    • age related cognitive decline (@R41.81*)
    • altered mental status (@R41.82*)
    • cerebral degeneration (@G31.9*)
    • cerebrovascular diseases (@I60*-@I69*)
    • change in mental status (@R41.82*)
    • cognitive deficits following (sequelae of) cerebral hemorrhage or infarction (@I69.01*-, @I69.11*-, @I69.21*-, @I69.31*-, @I69.81*-, @I69.91*-)
    • cognitive impairment due to intracranial or head injury (@S06*.-)
    • dementia (@F01*.-, @F02*.-, @F03*.-)
    • mild neurocognitive disorder due to a known physiological condition (@F06.7*-)
    • neurologic neglect syndrome (@R41.4*)
    • personality change, nonpsychotic (@F68.8*)

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G31.84 Right Arrow 331.83 Mild cognitive impairemt
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
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
G31.80 Leukodystrophy, unspecified
G31.81 Alpers disease
G31.82 Leigh's disease
G31.83 Neurocognitive disorder with Lewy bodies
G31.85 Corticobasal degeneration
G31.86 Alexander disease
G31.87 Primary progressive apraxia of speech
G31.89 Other specified degenerative diseases of nervous system
G31.9 Degenerative disease of nervous system, unspecified
This page was last updated on: 10/1/2025
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