An RD is not technically a degree but a professional credential: Registered Dietitian. The letters “RD” after someone’s name mean they have completed an accredited nutrition and dietetics program, finished at least 1,000 hours of supervised practice, and passed a national exam administered by the Commission on Dietetic Registration. As of January 1, 2024, earning the RD credential requires a graduate degree (master’s or doctorate) from a regionally accredited institution, up from the previous requirement of a bachelor’s degree.
What the RD Credential Actually Means
When you see “RD” or “RDN” (Registered Dietitian Nutritionist) after a person’s name, it signals a specific, regulated level of expertise in food, nutrition, and health. Unlike the title “nutritionist,” which has inconsistent legal protection across the country, the RD designation is nationally standardized. Most states regulate who can call themselves a dietitian through licensing statutes that include title protection, meaning unlicensed individuals cannot present themselves to the public as dietitians. Many states go further with practice exclusivity clauses that restrict unlicensed people from providing certain nutrition services altogether.
This distinction matters if you’re considering a career in the field. Someone without the RD credential may be able to offer general wellness guidance in some places, but clinical nutrition therapy, hospital-based counseling, and insurance-reimbursed nutrition services typically require the RD.
Education Requirements
The path to becoming an RD starts with completing coursework through a program accredited by the Accreditation Council for Education in Nutrition and Dietetics (ACEND). Since January 2024, new candidates must hold at least a master’s degree from an institution accredited by a U.S. Department of Education-recognized accreditor, or a foreign equivalent. This graduate degree requirement applies only to people seeking eligibility for the first time on or after that date; dietitians who were already registered under the old bachelor’s-level standard do not need to go back for an additional degree.
The academic coursework covers areas like biochemistry, medical nutrition therapy, food science, community nutrition, and management. How you complete this coursework depends on which type of accredited program you choose.
Three Program Pathways
ACEND accredits several types of programs, and understanding the differences can save you time and money when planning your education.
- Didactic Program in Dietetics (DPD): This covers the required academic coursework but does not include supervised practice. After completing a DPD and at least a bachelor’s degree, you then apply separately to a dietetic internship to fulfill the hands-on training requirement. Because the internship is a separate application process, placement is competitive.
- Coordinated Program (CP): This bundles academic coursework and supervised practice into a single degree-granting program. You graduate ready to sit for the exam without needing a separate internship match. These programs are convenient but less common and may have limited seats.
- Graduate Program in Nutrition and Dietetics (GP): Similar in structure to coordinated programs, a GP integrates coursework and experiential learning at the graduate level, producing candidates who meet both the new master’s degree requirement and the supervised practice requirement in one program.
All three pathways require at least 1,000 hours of supervised, hands-on practice. This experiential learning typically rotates through clinical settings (hospitals, outpatient clinics), community nutrition programs, and foodservice management operations. The goal is to build competency in real-world environments before you practice independently.
The Registration Exam
Once you’ve finished your degree and supervised practice hours, you become eligible to take the Registration Examination for Dietitians. The exam is computer-based and lasts three hours. As of June 2025, the exam fee is $250. It tests your ability to apply nutrition science, clinical judgment, foodservice management principles, and professional practice standards across a range of scenarios.
The exam is pass/fail, and candidates who don’t pass on the first attempt can retake it. You’ll need to review the official RD Handbook for Candidates before scheduling your test date, as it contains the current content outline and testing policies.
How Long the Process Takes
From start to finish, expect the RD path to take roughly six to eight years after high school. A typical timeline looks like four years for a bachelor’s degree, two to three years for a master’s (or a combined program), and the supervised practice hours woven in during or after the graduate program. If you enter a coordinated or graduate program that integrates coursework and practice, you can shave time off the back end. The exam itself can be scheduled relatively quickly once you’re verified as eligible.
Where RDs Work
Registered Dietitians work in a wide range of settings. Hospitals and healthcare systems employ the largest share, where RDs assess patients’ nutritional needs, design meal plans for specific medical conditions, and collaborate with physicians and nurses. Beyond clinical care, RDs work in outpatient private practice, public health departments, school nutrition programs, corporate wellness, sports nutrition, food industry consulting, and academic research. Some specialize further by earning board certifications in areas like pediatric nutrition, renal nutrition, or oncology nutrition.
The credential is portable across state lines, though you’ll typically need to obtain or transfer a state license when you move. Licensing requirements vary, but holding the RD credential satisfies the education and exam components in every state that regulates the profession.
Maintaining the Credential
Earning the RD is not a one-time achievement. To keep your registration active, you must complete continuing professional education on a recurring cycle. This ensures practicing dietitians stay current with evolving nutrition science, medical guidelines, and professional standards. If you let your registration lapse, you may need to meet reinstatement requirements before you can use the credential again.