G30.0 — Alzheimer's disease with early onset
G30.0 is a billable, specific ICD-10-CM code for alzheimer's disease with early onset. It is valid for submission on a claim.
Excludes1 inherited from the categories above G30.0
These are not written on G30.0, but they bind it: a note on a category applies to every code beneath it. Billing G30.0 with anything listed here is a denial.
Other codes that can never be billed with G30.0
These codes carry an Excludes1 note pointing at G30.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G30.0 alone.
- G31.1Senile degeneration of brain, not elsewhere classified
Risk adjustment
G30.0 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 127 Dementia, Mild or Unspecified0.341 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
G30.0 is named in 22 Medicare coverage policies — 20 listing it as supporting medical necessity, and 2 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
- A56562Billing and Coding: Health and Behavior Assessment/Interventionnot covered
- A53052Billing and Coding: Home Health Speech-Language Pathology
- A53057Billing and Coding: Home Health Occupational Therapy
How G30.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to G30.0.
- Disease, diseased›Alzheimer's›early onset
- Disease, diseased›Alzheimer's›early onset›with behavioral disturbance
Code history
G30.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share G30. If G30.0 is not quite right, the correct code is usually one of these.
Questions about G30.0
- Is G30.0 a billable ICD-10-CM code?
- Yes. G30.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G30.0 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other degenerative diseases of the nervous system (G30-G32).
- What cannot be coded together with G30.0?
- G30.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above G30.0 (G30) and apply to it just the same.