I have never heard doctor treating different races in different way 
Only way you can somewhat ground race to biology is genetics, but then race isn't best one either to use.
I have never heard doctor treating different races in different way 
Only way you can somewhat ground race to biology is genetics, but then race isn't best one either to use.
Have you ever researched medicine in this capacity?
http://www.the-scien...e-and-Medicine/
The role of race in medicine
These and related findings clearly support the presence of race-related variations in disease risk, disease progression, treatment response, and treatment-related side effects. As such, there remains an important role for race/ethnicity, as a marker for ancestry and often for culture, as well as other sociodemographic traits, in characterizing patients with respect to medical care. These variables can be helpful in understanding key aspects of health beliefs, health behaviors, access to care, and likely response to therapeutic interventions.
For example, persons of African descent in the United States who self-identify as black or African American are more likely to have certain biologic traits that were ancestrally protective in Africa, such as heterozygosity for sickle cell disease, which helps to protect against malaria, or the newly described APOL1 gene, which protects against trypanosomiasis (Science, 329:841-45, 2010). Of course, the allele that conveys malaria protection in heterozygotes causes sickle cell disease in those carrying two copies, and persons homozygous for the protective form of APOL1 are at increased risk for kidney failure. Thus, in settings where malaria and trypanosomiasis are rare, these biological traits are disadvantageous and may impart adverse health consequences.
The dogma, race is a social construct is actually dangerous to human beings who want to receive appropriate medical treatment.