Must obtain certification and/or become registered to practice in this field “Employers may prefer to hire diagnostic medical sonographers and cardiovascular technologists and technicians who have professional certification, or they may expect applicants to earn certification shortly after being hired. For payment purposes, insurance providers and Medicare may stipulate that a certified sonographer, technologist, or technician perform certain procedures. Certification is available from several organizations, such as the American Registry for Diagnostic Medical Sonographers, American Registry of Radiologic Technologists, Cardiovascular Credentialing International, and National Healthcareer Association. All diagnostic medical sonographers and cardiovascular technologists and technicians must pass an exam to earn certification. “