G31.84

Billable

Mild cognitive impairment of uncertain or unknown etiology

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

Mild cognitive impairment with no clear identified cause; a condition where thinking and memory problems are noticeable but not severe enough to interfere significantly with daily life.

Coding Tips

•This code is used when cognitive decline is documented but the underlying cause is uncertain or unknown
•Distinguish between mild cognitive impairment and normal age-related memory changes; document baseline cognitive function

Excludes 1 — Do NOT code together

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)

Use Additional Code

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)

Code Hierarchy

└G31Other degenerative diseases of nervous system, not elsewhere classified └G31.8Other specified degenerative diseases of nervous system └G31.84Mild cognitive impairment of uncertain or unknown etiology

└G31.84Mild cognitive impairment of uncertain or unknown etiology