ICD10Check
CheckerBrowseOpen

G31.84

✓ Billable

Mild cognitive impairment of uncertain or unknown etiology

Diseases of the nervous system (G00-G99)

Check This Code

Also Known As

Mild cognitive disorder NOSMild neurocognitive disorder of uncertain or unknown etiology

📋 Code Instructions

  • • 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

direct

Cannot be coded with G31.84

  • • 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)

🧪 Validate Combinations

Add G31.84 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeG31.84
BillableYes
ParentG31.8
CategoryDiseases of the nervous system (G00-G99)
Excludes111 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)