["Journal of the American Geriatrics Society, EarlyView. ", "\nABSTRACT\nMost visits to the emergency department (ED) by persons living with dementia (PLWD) who are then discharged back into the community are preventable. However, care partners and other caregivers of the over 6 million PLWD residing in the United States lack the supports, services and timely access to clinical care to address many common needs in the community. Thus, care partners resort to taking the PLWD to the ED, a sub‐optimal environment that can be traumatic to the PLWD, increase iatrogenesis, and ultimately may not resolve the underlying reason for the visit. Longitudinal nurse‐led telephonic care (NLTC) provided following an ED visit with community discharge may present an effective and efficient model for health systems to support care partners, decant busy EDs, and provide high‐quality, person and family‐centered impactful care to support PLWD and their care partners. This paper describes the development of an NLTC program being implemented as part of the Emergency Departments LEading Transformation of Alzheimer's and Dementia Care (ED‐LEAD) trial, a factorially designed embedded pragmatic clinical trial in 79 EDs. The NLTC program utilizes components of two previously tested programs, the Aliviado Dementia Care quality improvement program, and the Emergency Medicine Palliative Care Access (EMPallA) nurse‐led telephonic palliative and transitional care program to support PLWD and their care partners. Successful implementation of the NLTC program may lead to increased uptake of NLTC programs by health systems, improving quality of care and quality of life for PLWD and their care partners.\n"]