Credential Evaluation Service (CES): This service assesses the educational and professional credentials of foreign-educated nurses to determine their equivalency to U.S. standards. Certification Program: This program includes a credentials evaluation, an English language proficiency exam, and the CGFNS Qualifying Exam. VisaScreen: A comprehensive screening service for healthcare professionals seeking an occupational visa to work in the United States. Credentials Verification Service for New York State: A specialized service for nurses wanting to practice in New York.