All medical center food service personnel must also complete training on food preparation methods, safety and sanitation, and hospital food services such as special diets for patients.

Certified Nutrition Support Clinicians (CNSCs): 

• Provide nutritional intake recommendations to patients who cannot eat a normal diet, for example, those in critical care who require intravenous feeding. 
• These clinicians are certified through a national exam and maintain their CNSC status by passing the national certification exam every five years.

Certified Diabetes Care and Education Specialists (CDCES):

• These clinicians are licensed or certified health professionals such as Registered Dietitian Nutritionists (RDNs), nurses or physicians who have a minimum of two years and 1,000 hours of diabetes patient education, work in a primary role as a diabetes educator and have passed the national certifying exam. 
• Maintenance of the CDE credential requires passing the national certification exam every five years or acquiring a specified number of Continuing Education hours.

Certified Renal Specialist (CRS):

• These clinicians are advanced practice specialists in Renal Nutrition care. They provide expertise to patients with kidney disease, including those requiring dialysis and transplant recipients. 
• They have successfully met practice hour requirements, passed a national certification exam, and must re-take the certification exam every five years.

Certified Specialist in Obesity and Weight Management (CSOWM):

• These clinicians are advanced practice specialists in weight management.  They provide expertise to patients who want to lose weight and those who have bariatric surgery.
• They have successfully met practice hour requirements, passed a national certification exam, and re-take certification exam every 5 years.

Inpatient Registered Dietitian Nutritionists (RDNs):

• Monitor admitted patients’ nutritional status to help with recovery from illness.
• Dietitians assess patients’ nutritional status, instruct and counsel patients who are on special diets, and monitor how patients are eating.

Outpatient Dietitian Nutritionists (RDNs):

• Provide nutrition assessment and diet education to patients who are not hospitalized.