This technical note introduces a methodology to estimate electricity requirement ranges for health care facilities, especially unserved and under-served facilities. It combines a bottom-up approach to assessing the electricity requirements at the facility level with a geographic information system (GIS) based analysis. The methodology is applied to a case study for existing facilities in Uganda in close collaboration with the Ugandan Ministry of Health and the Energy Sector GIS Working Group. Outputs of the analysis are also integrated into Energy Access Explorer, where they can be overlaid with information on current and potential supply, and made available for a dynamic, multicriteria prioritization analysis and the development of customized reports. This methodology will provide a data-driven, integrated approach to planning for the expansion of energy services in health care.