Arden College Billing & Coding School is a National Healthcareer Association Affiliated School, offering National Certification as part of our program. Our primary goal is to improve the healthcare industry one worker at a time. Arden College’s (AC) affiliation with the National Healthcareer Association (NHA) is the key to our students success and is recognized by healthcare employers around the country. AC includes national certification as part of our school’s program . . . giving our students a competitive edge in the national job market.