G30 – Alzheimer's disease

ICD-10-CM 2027 diagnosis code · Other degenerative diseases of the nervous system

Non-billable header

ICD-10-CM code G30

Code: G30 (claims format: G30)
Description: Alzheimer's disease
Billable: No – use a more specific code below
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

Billable codes under G30

G30 is a header code and cannot be used on claims. Choose the most specific code:

G30.0 – Alzheimer's disease with early onsetBillable
G30.1 – Alzheimer's disease with late onsetBillable
G30.8 – Other Alzheimer's diseaseBillable
G30.9 – Alzheimer's disease, unspecifiedBillable

Notes for G30

Includes:

Alzheimer's dementia senile and presenile forms

Excludes1 (not coded here):

senile degeneration of brain NEC (G31.1)
senile dementia NOS (F03.-)
senility NOS (R41.81)

Use additional code:

code, if applicable, to identify:
delirium, if applicable (F05)
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-)

Frequently asked questions

What is ICD-10 code G30?

G30 is the ICD-10-CM code for alzheimer's disease, in the block G30-G32 (Other degenerative diseases of the nervous system).

Is G30 a billable code?

No. G30 is a header code with more specific child codes; report one of the billable codes listed above.

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.