G30.1 — Alzheimer's disease with late onset
G30.1 is a billable, specific ICD-10-CM code for alzheimer's disease with late onset. It is valid for submission on a claim.
Risk adjustment
G30.1 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
G30.1 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 G30.1 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 G30.1.
- Disease, diseased›Alzheimer's›late onset
- Disease, diseased›Alzheimer's›late onset›with behavioral disturbance
Related codes at this level
Codes that share G30. If G30.1 is not quite right, the correct code is usually one of these.
Questions about G30.1
- Is G30.1 a billable ICD-10-CM code?
- Yes. G30.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does G30.1 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other degenerative diseases of the nervous system (G30-G32).