MCMedicalCodingSoftware
G31.1

G31.1: Senile degeneration of brain, not elsewhere classified

Billable / specific codeICD-10-CM

G31.1 is a billable, specific ICD-10-CM code for senile degeneration of brain, not elsewhere classified. It is valid for submission on a claim.

Check G31.1 with the rest of the claim: free scrubber

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

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

Excludes2 inherited from the categories above G31.1

Not part of this code, but both may be coded when both are present.

Written on G31: Other degenerative diseases of nervous system, not elsewhere classified

Other codes that can never be billed with G31.1

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • G30Alzheimer's disease

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

G31.1 is named in 13 Medicare coverage policies: 11 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which one applies depends on your Medicare contractor.

  • A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
  • A56562Billing and Coding: Health and Behavior Assessment/Interventionnot covered
  • A53134Billing and Coding: NCD Coding Article for Positron Emission Tomography (PET) Scans Used for Non-Oncologic Conditions
  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders

Alphabetic index entries that lead here

  • Degeneration, degenerative›motor centers, senile
  • Atrophy, atrophic›brain›senile NEC
  • Degeneration, degenerative›brain›senile NEC
  • Degeneration, degenerative›senile›brain
  • Degeneration, degenerative›senile›motor centers
  • Disease, diseased›brain›senile NEC

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under G31

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.