G30.9  – Alzheimer's disease, unspecified

G30.9 – Alzheimer's disease, unspecified

Learn more about G30.9 - Alzheimer’s disease, unspecified | ICD-10-CM, and its synonym, related codes, billability, and more in our guide.

By Harriet Murray on Jul 16, 2025.

Fact Checked by Ericka Pingol.

Use Code

G30.9 diagnosis code: Alzheimer's disease, unspecified

  • G30.9 is a billable ICD-10-CM code used for reimbursement for the diagnosis of Alzheimer's disease, unspecified. 
  • The ICD-10-CM version G30.9 is used to diagnose Alzheimer's disease, unspecified in America. The code for the corresponding diagnosis may vary internationally. 
  • “Diseases of the nervous system” is its umbrella category. More specifically, the code falls under “Alzheimer's disease.”  
  • G30.9 is only used when there's unknown or unavailable clinical information.

Is G30.9 billable?

Yes, it is billable, meaning one can use it for insurance reimbursement.

Clinical information

  • A degenerative disease and one of the most common forms of dementia among older people, Alzheimer's disease (AD), usually begins past middle age and gets worse as time passes.
  • Alzheimer's disease is when nerve cells get damaged and die, which disrupts brain function. As a result, the patient will have cognitive decline and memory loss.
  • There are two classifications of Alzheimer's disease: early-onset and late-onset. Those who exhibit signs and symptoms as early as their thirties can be diagnosed with early-onset Alzheimer's. Meanwhile, those who exhibit signs and symptoms after their mid-sixties can be diagnosed with late-onset Alzheimer's disease. 
  • Early-onset Alzheimer's is rarer than late-onset. 
  • Some signs and symptoms of Alzheimer's disease are loss of memory, facing challenges when problem-solving, struggles with accomplishing daily tasks, confusion, problems with speaking or writing, poor judgment, and changes in behavior and personality. 
  • There's no treatment to stop or cure the disease, only medication to prevent it from worsening or help manage its symptoms. 
  • The risk of a person being diagnosed with Alzheimer's increases with age and if a family member is diagnosed with the same disease.

Synonyms include

  • Alzheimer's disease
  • Dementia without behavioral disturbance
  • Delusions in Alzheimer's disease
  • Depressed mood in Alzheimer's disease
  • Alzheimer's disease with delirium

Other ICD-10 codes commonly used for Alzheimer's disease

  • G30.0: Alzheimer's disease with early onset
  • G30.1: Alzheimer's disease with late onset
  • G30.8: Other Alzheimer's disease
  • F02.80: Dementia in other diseases classified elsewhere, unspecified severity, without behavioral disturbance, psychotic disturbance, mood disturbance, and anxiety

Related ICDs

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