G31.1

ICD-10Billable

Senile degeneration of brain, not elsewhere classified

Official ICD-10-CM descriptor (FY2026)

Senile degeneration of brain, not elsewhere classified

G31.1 is valid for submission on a claim — CMS flags it as a billable, specific code.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

Alzheimer's disease (G30.-)
senility NOS (R41.81)

Related codes in G31

Where this code sits

Chapter: 6. Diseases of the nervous system (G00-G99)
Block: Other degenerative diseases of the nervous system (G30-G32)
Parent code: G31

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.