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).

Application Process


  • To apply for the exam, submit an application with the appropriate fee to the Professional Testing Corporation (PTC), NBNSC's testing partner.


  • The exam content outline is included in the candidate handbook.  To access the content outline, download the candidate handbook



  • All requests for receipt of payment for the CNSC exam should be addressed to the Professional Testing Corporation (PTC) at (212) 356-0660 or .