Over the last four years, health systems across the United States have phased out the use of several clinical tools that use race to predict patient outcomes, replacing them with race-free versions that carry less risk of perpetuating inequitable care. But there's a wide world of other calculators and algorithms used to make decisions about patients every day — many of which use race, sex, and other traits protected by federal anti-discrimination laws. As a deadline for federally funded health systems to vet those tools for discrimination approaches in May, it's still unclear how they'll tackle the challenge.