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).
- 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 and application is included in the candidate handbook. To access the content outline, download the candidate handbook
- To obtain an additional application for the Certification Examination for Nutrition Support Clinicians, contact the Professional Testing Corporation (PTC), 1350 Broadway, 17th Floor, New York, NY 10018 (212) 356-0660,
- All requests for receipt of payment for the CNSC exam should be addressed to the Professional Testing Corporation (PTC) at (212) 356-0660 or