ICD-10-CM
ICD-10 code for Mild cognitive impairment: G31.84
The closest CDC title for "Mild cognitive impairment" is G31.84, Mild cognitive impairment of uncertain or unknown etiology. G31.84 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under G31, then other CDC titles that name mild cognitive impairment of uncertain or unknown etiology
A header groups codes and is not billed. A billable code is one you can report.
- G31Other degenerative diseases of nervous system, not elsewhere classifiedHeader
- G31.0Frontotemporal dementiaHeader
- G31.01Pick's diseaseBillable
- G31.09Other frontotemporal neurocognitive disorderBillable
- G31.1Senile degeneration of brain, not elsewhere classifiedBillable
- G31.2Degeneration of nervous system due to alcoholBillable
- G31.8Other specified degenerative diseases of nervous systemHeader
- G31.80Leukodystrophy, unspecifiedBillable
- G31.81Alpers diseaseBillable
- G31.82Leigh's diseaseBillable
- G31.83Neurocognitive disorder with Lewy bodiesBillable
- G31.84Mild cognitive impairment of uncertain or unknown etiologyBillable
- G31.85Corticobasal degenerationBillable
- G31.86Alexander diseaseBillable
- G31.87Primary progressive apraxia of speechBillable
- G31.89Other specified degenerative diseases of nervous systemBillable
- G31.9Degenerative disease of nervous system, unspecifiedBillable
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From G31. A note on a category applies to every code under it.
Use additional code, if applicable, for codes G31.0-G31.83, G31.85-G31.9, to identify:
- F02.84, F02.A4, F02.B4, F02.C4Dementia with anxiety
- F02.81-, F02.A1-, F02.B1-, F02.C1-Dementia with behavioral disturbance
- F02.83, F02.A3, F02.B3, F02.C3Dementia with mood disturbance
- F02.82, F02.A2, F02.B2, F02.C2Dementia with psychotic disturbance
- F02.80, F02.A0, F02.B0, F02.C0Dementia without behavioral disturbance
- F06.7-Mild neurocognitive disorder due to known physiological condition
Excludes1
Excludes1 means these codes are not reported together.
- R41.81Age related cognitive decline
- R41.82Altered mental status
- G31.9Cerebral degeneration
- I60-I69Cerebrovascular diseases
- R41.82Change in mental status
- I69.01-, I69.11-, I69.21-, I69.31-, I69.81-, I69.91-Cognitive deficits following (sequelae of) cerebral hemorrhage or infarction
- S06.-Cognitive impairment due to intracranial or head injury
- F01.-, F02.-, F03.-Dementia
- F06.7-Mild neurocognitive disorder due to a known physiological condition
- R41.4Neurologic neglect syndrome
- F68.8Personality change, nonpsychotic
Excludes2
Excludes2 means the other condition can be reported with this one when both are documented.
From G31. A note on a category applies to every code under it.
Related conditions
Related pages
- G31.84 code detailsNotes, nearby codes, CMS-HCC group
- Category G31Every code under it
- Chapter 6Diseases of the nervous system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Mild cognitive impairment?
The closest CDC title for "Mild cognitive impairment" is G31.84, Mild cognitive impairment of uncertain or unknown etiology. G31.84 is a billable code.
Is G31.84 billable?
Yes. G31.84 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to G31.84?
The CDC tabular list gives 11 Excludes1 notes (not coded together), 1 Excludes2 note (may be coded together when both are documented), 15 "use additional code" notes for G31.84 and the categories above it. They are listed on this page.
What chapter is G31.84 in?
Chapter 6. Diseases of the nervous system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.