BACKGROUND AND OBJECTIVES: The 2011 Alliance for Clinical Education panel recommended the development of a specialty-specific curriculum for all subinternships (sub-Is). A 2019 CERA survey found that 58% of family medicine clerkship directors agreed that a standardized curriculum would be helpful. The goal of this study was to explore attitudes and preferences regarding a national family medicine sub-I curriculum among a broad set of stakeholders. METHODS: Focus groups were conducted with medical students, residents, residency faculty, and undergraduate medical education faculty at the 2020 STFM Conference on Medical Student Education. Focus groups were transcribed, and a qualitative analysis was conducted with participants' responses about the benefits and characteristics of a family medicine sub-I, recommendations for core sub-I skills/objectives, likelihood of using a national curriculum, and preferred student and program evaluation methods. RESULTS: There were four focus groups with a total of 24 participants. The following main themes emerged: the family medicine sub-I has distinctive characteristics from other sub-Is and provides unique benefits for students and residency programs, a standardized curriculum should allow for adaptability and flexibility, and the sub-I evaluation for the students and program should be specific and experience-focused. These themes were classified into specific subthemes. CONCLUSIONS: The stakeholder emphasis on themes of uniqueness, adaptability, and specificity within evaluation will help educators structure a comprehensive framework for national recommendations for the sub-I curriculum. A well-designed family medicine sub-I may provide rigorous educational training for students and may also encourage career commitment to the discipline.