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Commission on Dietetic Registration (CDR) Registration Examination for Dietitians
600 questions
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About this exam
The Commission on Dietetic Registration (CDR) Registration Examination for Dietitians is the national credentialing exam for eligible candidates seeking the Registered Dietitian Nutritionist (RDN) credential in the United States. Candidates generally qualify after completing an ACEND-accredited dietetics education pathway and required supervised practice, with CDR confirming eligibility before they schedule the exam. A graduate degree has been required for new exam eligibility since January 1, 2024. The exam assesses whether candidates can apply entry-level dietetics knowledge and judgment in professional practice.
The exam is a computer-based, adaptive test with 125 to 145 questions and up to two and a half hours for testing. Its content spans four domains: Principles of Dietetics; Nutrition Care for Individuals and Groups; Management of Food and Nutrition Programs and Services; and Foodservice Systems. Review the Nutrition Care Process, clinical assessment, medical nutrition therapy for diabetes, cardiovascular and renal conditions, and enteral and parenteral nutrition. Use the current CDR test specifications to guide review, and use timed MCQ practice with explanations to identify gaps and strengthen clinical reasoning.
How to prepare for the CDR Registration Examination
- Start with the current CDR examination content outline and map each of its four domains to your study materials; give extra review time to areas where your knowledge is weakest.
- Practice applying the Nutrition Care Process to clinical scenarios, including assessment, diagnosis, intervention, and monitoring, and review medical nutrition therapy across common conditions.
- Use timed question sets to build decision-making pace, then analyze every answer and rationale; confirm eligibility, exam policies, and current specifications in official CDR resources.
FAQ
Who is eligible to take the CDR Registration Examination for Dietitians?
Eligibility is generally based on completing an ACEND-accredited dietetics education pathway and required supervised practice, plus meeting the graduate-degree requirement for exam eligibility. CDR must verify a candidate’s eligibility before the candidate schedules the exam. Check CDR and ACEND resources for pathway details, including options for international applicants.
What is the format of the RDN registration exam?
It is a computer-based adaptive exam with 125 to 145 questions and up to two and a half hours of testing time. Review the current CDR candidate information for details about scheduling, testing procedures, and the exam-day experience.
What subjects are on the CDR dietitian exam?
The exam covers Principles of Dietetics; Nutrition Care for Individuals and Groups; Management of Food and Nutrition Programs and Services; and Foodservice Systems. The current CDR content outline is the best guide to specific topics and their emphasis.