A medically trained, licensed and experienced doctor practicing in the U.S. who is certified by USCIS (U.S. Citizenship and Immigration Service). These medical professionals receive U.S. immigration-focused training in order to provide examinations as required by the CDC (Center for Disease Control and Prevention) and USCIS. For medical examinations given overseas, please see Panel Physician (USCIS). IMPORTANT: medical examinations will not be recognized if they are given by a doctor in the U.S. who is not a Civil Surgeon; please make sure that your appointment is with a Civil Surgeon or your results and documents will be invalid.