ICD-10-CM Book 2026 Edition

Chapters ICD-10-CM Book Table of Content /
chapter 6 G00-G99 Diseases of the nervous system /
G30-G32 Other degenerative diseases of the nervous system /
G31 Other degenerative diseases of nervous system, not elsewhere classified

  Billable ICD-10-CM Code G31.84
G31.84
Mild cognitive impairment of uncertain or unknown etiology
Mild cognitive disorder NOS
Mild neurocognitive disorder of uncertain or unknown etiology
useAdditionalCode
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-I1A)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)
excludes1
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)