G31.84 vs I69.31
G31.84 (Mild cognitive impairment of uncertain or unknown etiology) compared with I69.31 (Cognitive deficits following cerebral infarction), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. G31.84 carries an Excludes1 note covering I69.31: “cerebrovascular diseases (I60-I69)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. G31.84 carries an Excludes1 note covering I69.31: “cognitive deficits following (sequelae of) cerebral hemorrhage or infarction (I69.01-, I69.11-, I69.21-, I69.31-, I69.81-, I69.91-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| G31.84Mild cognitive impairment of uncertain or unknown etiology | I69.31Cognitive deficits following cerebral infarction | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | G00-G99 — Diseases of the Nervous System (G00-G99) | I00-I99 — Diseases of the Circulatory System (I00-I99) |
| Definition | Mild cognitive impairment of uncertain or unknown etiology is a billable ICD-10-CM diagnosis code (G31.84). | Cognitive deficits following cerebral infarction is a non-billable ICD-10-CM category code (I69.31). |
| Includes | Mild cognitive disorder NOS Mild neurocognitive disorder of uncertain or unknown etiology | — |
| Use additional code | code to identify presence of: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) | code to identify presence of: alcohol abuse and dependence (F10.-) exposure to environmental tobacco smoke (Z77.22) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources