The AADAPT Act amends federal law to expand and reauthorize the Project ECHO Grant Program, which uses technology to train healthcare providers in underserved areas. The bill adds a new focus on Alzheimer's disease and related dementias by creating grants for eligible organizations to develop training models that help primary care providers in rural, frontier, and underserved areas improve their ability to diagnose and treat dementia patients early. The legislation directs the Secretary of Health and Human Services to award these grants within one year of enactment and requires grantees to evaluate how their training programs affect both patient outcomes and healthcare provider retention. The bill authorizes $10 million annually from fiscal years 2026 through 2031 for the new dementia-specific grants, in addition to $10 million yearly through 2031 for the existing program, and requires the Secretary to report to Congress on program results within four years of the law's enactment.