Although the subinternship (sub-I) is considered integral in many medical schools' curricula, family medicine does not have standardized course recommendations. Given the variable nature of this clinical experience, this study investigated the potential role of a standardized sub-I curriculum in family medicine. Questions about sub-Is were created and data were gathered and analyzed as part of the 2019 Council of Academic Family Medicine's (CAFM) Educational Research Alliance (CERA) survey of family medicine clerkship directors. The survey was distributed via email to 126 US and 16 Canadian recipients between June 19, 2019 and August 2, 2019 through the online program SurveyMonkey. A total of 101 (71.1%) of 142 clerkship directors responded to the survey. Most (84.2%) schools require sub-Is. There was a positive association between students matching into family medicine and having family medicine sub-Is at residency programs (P<.001). There was no relationship between higher family medicine match rates and the presence of family medicine sub-Is at nonresidency sites (P=.48) or having an advanced ambulatory rotation requirement (P=.16). A sub-I is a way to further expose students to family medicine, and increasing sub-I positions at residency programs may influence the number who pursue the specialty. Creation of a standardized sub-I curriculum presents an opportunity to enhance a critical educational experience in family medicine.