Interdisciplinarity has been touted as a means to recruit more racially and gender-diverse students to computing. In this explanatory sequential mixed-methods study, we investigated demographic characteristics among a sample of undergraduate students pursuing interdisciplinary computing major and minor combinations at 15 institutions in the United States who completed a survey at the end of their introductory course. Descriptive analyses of responses to this survey of introductory computing students revealed that enrollment in interdisciplinary major and minor combinations was limited and did not appear to disproportionately attract women or Black/African American, Latine, Indigenous, and/or Multiracial students. We then conducted a directed content analysis of departmental websites to examine the language and policies that may have precluded or encouraged students to pursue interdisciplinary computing major and minor combinations. Findings revealed that departmental offerings of such programs were limited, and, among those that did offer such programs, communication about their goals and requirements was often lacking. Implications for research and practice, especially as they pertain to efforts to broaden participation in computing, are discussed.