Filling out paperwork in the doctor's office is hell, but providers should have patients fill out optional paperwork that outlines a few things regarding their culture to refer to as they do their work up. That would clarify things instead of just going on assumptions. Stereotypes are a way to group people together, and it ends up being more harmful than not because Western societies are typically not only very individualistic, but there's been enough racial and cultural blending that it would be stupid to outright assume anything about someone based on appearance and basic information.

That said, there are still lab tests performed during pregnancy and other situations that do account for race/ethnicity/and even the countries that you've previously lived in due to different lab reference ranges and clinical evidence.