The goal of this clinical trial is to determine if utilizing the Quest AD-Detect blood test, while patient's are hospitalized for a cognitive diagnosis (such as delirium or encephalopathy), will result in an earlier diagnosis of underlying Alzheimer's disease.

• Will this blood test have the ability to distinguish between Alzheimer's disease and other causes of cognitive impairment in the inpatient setting?
• Neurology Clinic will complete a 6-month post-hospitalization follow up with patients who have had the Quest AD-Detect Alzheimer's Disease blood test completed while they were inpatient to discuss the risk assessment portfolio

Inclusion Criteria:

• Ages 60 to 90 years old
• No prior diagnosis of dementia
• Currently hospitalized with cognitive diagnosis, including but no limited to; delirium, encephalopathy, etc. thought to be secondary to a toxic/metabolic state

Exclusion Criteria:

• Age under 60 years
• Prior diagnosis of dementing illness or other organic etiology to cognitive impairment