The National Board of Nutrition Support Certification (NBNSC) is an independent credentialing board established in 1984 by the American Society for Parenteral and Enteral Nutrition (ASPEN).
Nutrition support is a specialized practice that requires the expertise of multiple health-care professionals including physicians, dietitians, pharmacists, physician assistants, dentists, and nurses. 

NBNSC's credentialing program provides a valuable addition to your professional experience and contributes to excellent care. The Certified Nutrition Support Clinician®(CNSC®) credential identifies you as a qualified nutrition support provider. It is the most widely accepted, visible nutrition support certification with recognition both nationally and internationally.




NBNSC Job Analysis/Practice Audit Survey

Nutrition support professionals are invited to complete the NBNSC's job analysis/practice audit survey to help shape the future of the CNSC exam.  Responses must be submitted by February 13, 2023.

Make a Difference as a NBNSC Board or CNSC Exam Committee Member

The NBNSC is currently accepting applications for several open positions on the NBNSC Board of Directors and the Certified Nutrition Support Clinician® (CNSC®) Exam Committee. Applications are due February 1, 2023.

COVID-19 and the CNSC Exam: 

Information for the CNSC Exams

Individuals interested in sitting for the CNSC exam can apply here.   Dates and application deadlines for the CNSC exams are available here

Information about both remotely proctored and in-person testing options are available in the candidate handbook.    

For additional updates, please visit the PTC site at