US Immigration laws stipulate a medical physical exam is required for several immigration visas and also for some non immigration visas. Refugees and applicants who have filed for adjustment status should also go set for the immigration medical exam, which is also known as the Green Card Physical Examination. The main reason behind administering the Green Card Physical is to explore likelihood of any health conditions that could avoid the applicant from immigrating.
WHAT COULD MAKE AN APPLICANT INELIGIBLE FOR ADMISSIBILITY
USCIS-approved Civil Surgeons are specially designated and can administer the examination in the country. Panel Physicians can run the exam outside of the country.
DOT physical , according to CDC norms are classified into Class A and Class B categories.
If medical conditions of the applicant are categorized as Class A then your applicant cannot gain admission in to the country.
4 conditions that would make the applicant inadmissible based on medical health are:
Those people who have any form of communicable disease which could cause concern to public health like: chancroid, gonorrhea, HIV/AIDS, leprosy (infectious), infectious syphilis, infectious TB (Class A TB) and any communicable disease of public significance.
Those applicants who've to apply for immigrant visas or file for adjustment of status but have not received all the vaccinations as mandated by CDC.
Those individuals who display physical or mental anomalies, these disorders could also be associated with harmful behavior. There may be physical or mental disorders that could have existed in past times though these disorders aren't current in the present they are likely to recur in the foreseeable future and might even result in harmful behavior. Such conditions may lead to the visa being refused.
Individuals who are found to be abusers of drugs. Drug addicts too could are categorized as the scanner.
All other medical ailments are categorized as Class B. Medical conditions falling under Class B also involve physical and mental conditions, certain diseases along with other disabilities of serious or permanent nature. Class B category diseases could entertain waivers that may be applied for by applicants.

RELAX PRIOR TO THE IMMIGRATION EXAMINATION