Excellence, In Everything AAHA is an organization that accredits veterinary hospitals by a simple standard: excellence in everything they do. This is a voluntary practice for the hospital, and involves the testing and examination of over 900 facets of running a truly world-class veterinary practice. Because of the high and diverse standards, fewer than 15% of veterinary practices in the United States earn accreditation. We are proud to be one of the few. Because when it comes to your pet and your family, nothing less than excellence will do.