G31.1 – Senile degeneration of brain, not elsewhere classified
ICD-10-CM 2027 diagnosis code · Other degenerative diseases of the nervous system
- Code
G31.1(claims format:G311)- Description
- Senile degeneration of brain, not elsewhere classified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 6. Diseases of the nervous system (G00-G99)
- Block
- G30-G32 Other degenerative diseases of the nervous system
- Parent codes
- G31
Notes for G31.1
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
G31 – Other degenerative diseases of nervous system, not elsewhere classified
- Reye's syndrome (G93.7)
- code, if applicable, for codes G31.0-G31.83, G31.85-G31.9, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
Index terms for G31.1
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in G31
Frequently asked questions
What is ICD-10 code G31.1?
G31.1 is the ICD-10-CM code for senile degeneration of brain, not elsewhere classified, in the block G30-G32 (Other degenerative diseases of the nervous system).
Is G31.1 a billable code?
Yes. G31.1 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does G31.1 belong to?
It belongs to category G31 – Other degenerative diseases of nervous system, not elsewhere classified.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.