ICD-10 Code G30.8 – Other Alzheimer’s disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G30.8 – Other Alzheimer’s disease
What it is
Use this code for Alzheimer’s disease that does not fit the more specific listed subtype codes. It identifies a documented diagnosis of Alzheimer’s disease when the record specifies “other” or an equivalent nonspecific subtype.
Clinical signs
Clinical features vary; refer to documentation. Common findings in Alzheimer’s disease include progressive memory loss, impaired reasoning, and worsening ability to perform daily activities.
When to use this code
Assign G30.8 when the clinician documents Alzheimer’s disease but does not describe it as early onset, late onset, or another more specific category. Use the code only when the diagnosis is clearly stated in the chart. If the wording is unclear, check documentation before coding.
Do not use for
Do not use this code for other dementias, mild cognitive impairment, or nonspecific memory loss. Also avoid it when the record supports a more specific Alzheimer’s subtype.
Coding tip
Look for exact provider wording, because “Alzheimer’s disease” alone may require a more specific code or documentation query.