Cogtest Online provides a battery of tests in crucial neurocognitive domains. These tests have clinical utility for several disorders, including Attention Deficit Hyperactivity Disorder, Schizophrenia, Depression, and Bipolar Disorder. Additionally, Cogtest Online can test for subclinical presentations of impaired cognition, including memory loss, early dementia, and impulsivity. Cogtest Online provides clinicians with a tool for assessing cognitive sequelae of diseases, such as hypertension, diabetes, and chronic pain, as well as the neurocognitive effects of surgical procedures, medication, and substance use. All user identification is password-protected and fully compliant with 21 CFR Part 11 for electronic recordkeeping. The full battery of tests takes between 40-50 minutes to complete, allowing for rapid cognitive screening and retesting.