The Agency for Healthcare Research and Quality (AHRQ) recognizes that revitalizing primary care is key to achieving high quality, accessible, and efficient health care for all Americans, and that improving the research infrastructure will equip evaluators across the country to provide information that will help shape PCMH models to achieve those aims. To do so, PCMH evaluations must generate evidence that stakeholders (including patients, payers, providers, and employers) can use to improve primary care. This requires both understanding the different evidentiary needs of stakeholders and using the right tools to meet those needs.