This physical exam must be conducted by USCIS by a civil surgeon who has been designated by the Bureau of Citizenship and Immigration Services.
You can find the Dr. from the following website:
https://egov.uscis.gov/crisgwi/go?action=offices.type&OfficeLocator.office_type=CIV
You can find the Dr. from the following website:
https://egov.uscis.gov/crisgwi/go?action=offices.type&OfficeLocator.office_type=CIV