All freshman applicants to the University of Michigan have to submit either an ACT or SAT test score. However, the University of Michigan School of Nursing program website doesn't indicate a minimum score requirement for either. Instead, the standardized test score is part of the complete admissions assessment, which also involves an application, high school transcript, as well as school and teacher evaluation reports.
The University of Michigan nursing program encourages international students to take the SAT in lieu of the ACT because of its writing component. Additionally, the bachelor's of nursing degree program routinely admits sophomore transfer students. While the University of Michigan asks students to submit an SAT or ACT score, the degree page states that students that didn't complete either test in high school don't have to submit a score as part of their transfer application.