 However they also work in a variety of other healthcare settings, including office based physician practices, nursing homes, home health agencies, mental health facilities, and public health agencies.Technicians who specialize in coding are called medical coders or coding specialists.In the United States, health information technicians are certified as a Registered Health Information Technician (RHIT) after completing an associate degree in health information technology from a school accredited by the Commission on Accreditation for Health Informatics and Information Management Education (CAHIIM) before they may take their certification exam.