How to Become a Dietitian in 5 Steps

Medical & Career Disclaimer: This article is for informational purposes only and is not career, licensing, or medical advice. Requirements to become a Registered Dietitian Nutritionist (RD or RDN) are set by the Commission on Dietetic Registration (CDR) and enforced state by state. Always confirm current standards directly with CDR, ACEND, the Academy of Nutrition and Dietetics, and your state licensing board before enrolling in a program or applying for credentials.

How to Become a Registered Dietitian (RD/RDN) in the United States

Becoming a Registered Dietitian Nutritionist (RD or RDN) in the United States now takes a graduate degree. Since January 1, 2024, the Commission on Dietetic Registration (CDR) has required a minimum of a master’s degree, completion of an ACEND-accredited program, supervised experiential learning hours, and a passing score on the CDR credentialing exam before you can use the RD or RDN credential. Most states then add a separate license.

This guide walks through the current pathway step by step, explains where the older bachelor’s-only route no longer applies, and points to the primary sources so you can verify anything that looks different from what an older article or a program brochure may say.

What a Registered Dietitian Does

A Registered Dietitian Nutritionist is a credentialed food and nutrition professional who provides medical nutrition therapy (MNT), counsels patients on chronic disease management, plans meals in clinical settings, and, in many states, is one of the few practitioners legally allowed to diagnose and treat conditions such as malnutrition.

RDs and RDNs work in hospitals, outpatient clinics, long-term care, public health agencies, food service management, sports performance, private practice, research, and industry. The titles “RD” and “RDN” are legally protected credentials in the United States and are used interchangeably.

The Academy of Nutrition and Dietetics is the professional membership organization, while CDR is the independent credentialing agency that owns and administers the RD/RDN exam.

Step 1: Earn a Bachelor’s Degree and Complete a Didactic Program in Dietetics

The foundation is a bachelor’s degree that includes a Didactic Program in Dietetics (DPD) accredited by the Accreditation Council for Education in Nutrition and Dietetics (ACEND). Common majors include nutrition and dietetics, food and nutritional sciences, community nutrition, and clinical nutrition. Coursework typically covers biochemistry, physiology, food science, medical nutrition therapy, food service systems management, and community and public health nutrition.

If your bachelor’s degree is in another field, you can still qualify by completing DPD prerequisite coursework at an ACEND-accredited program before moving on to graduate study.

Step 2: Complete a Graduate Degree (Required Since 2024)

Effective January 1, 2024, CDR requires a minimum of a master’s degree to be eligible for the RD/RDN exam [1].

The graduate degree does not have to be in nutrition, but many candidates complete an integrated Coordinated Program (CP) or a Future Education Model (FEM) graduate program that combines the master’s coursework with the supervised experiential learning hours needed for the credential.

Doctoral degrees are accepted as well and are common for candidates targeting research, academic, or Certified Nutrition Specialist (CNS) pathways.

Step 3: Complete Supervised Experiential Learning (Dietetic Internship)

All candidates must complete supervised experiential learning through an ACEND-accredited pathway. Traditional Dietetic Internships (DIs) historically required 1,200 hours; ACEND’s 2022 standards set a minimum of 1,000 supervised experiential learning hours across clinical, community, and food service management rotations. Confirm the exact hour count with the specific program you are considering, as it can vary [2].

DIs are competitive. Applicants apply through a centralized matching service and rotate through hospitals, WIC clinics, school nutrition programs, dialysis centers, and food service operations. Future Education Model graduate programs bundle these hours into the degree, which can simplify scheduling but is not always cheaper.

Step 4: Pass the CDR Registration Examination for Dietitians

Once your graduate degree and supervised hours are complete and verified, CDR authorizes you to sit for the Registration Examination for Dietitians.

The computer-based exam is administered by Pearson VUE, uses a variable-length format ranging from roughly 125 to 145 questions, and covers four domains: principles of dietetics, nutrition care for individuals and groups, management of food and nutrition programs and services, and food service systems [1].

Candidates who pass earn the right to use “RD” or “RDN” immediately.

Step 5: Apply for State Licensure and Maintain Your Credential

Most states regulate dietetics practice through licensure, certification, or title protection. Rules differ widely: some states require licensure to practice medical nutrition therapy at all, some regulate only the use of specific titles, and a few have no state regulation. Check the Academy of Nutrition and Dietetics state licensure map for current requirements in your state before you accept a job [3].

Registered Dietitians must complete 75 hours of continuing professional education every five years under a CDR-approved Professional Development Portfolio. Many RDs also add specialty certifications such as Board Certified Specialist in Renal Nutrition (CSR), Pediatric Nutrition (CSP), Sports Dietetics (CSSD), Oncology Nutrition (CSO), or Obesity and Weight Management (CSOWM).

Where Registered Dietitians Work

The largest single employer of RDs is hospitals, but the field extends well beyond clinical practice. Common settings include:

• Acute care and inpatient rehabilitation hospitals
• Outpatient endocrinology, oncology, cardiology, and bariatric clinics
• Long-term care and dialysis centers
• WIC, SNAP-Ed, and other public health nutrition programs
• School and university food service systems
• Corporate wellness, tech-based health platforms, and telehealth
• Sports teams, collegiate athletics, and Olympic training centers
• Food industry product development, food safety, and regulatory affairs
• Private practice, group counseling, and eating disorder treatment

Salary and Job Outlook

According to the U.S. Bureau of Labor Statistics, the median annual pay for dietitians and nutritionists was in the mid-$70,000s in the most recent Occupational Outlook Handbook update, with employment projected to grow faster than the average for all occupations [3]. Pay varies significantly by setting, region, and specialty certifications; renal, oncology, and outpatient counseling roles often pay higher than school food service, for example.

Is the Path Worth It?

Becoming an RD or RDN is a long process: typically four years of undergraduate work, one to two years of graduate study, and up to a year of supervised experiential learning before you can even sit for the exam. In return, you earn a legally protected credential, a defined scope of practice, and access to insurance reimbursement in most states. If you are drawn to healthcare but want a nutrition-first role, RD is the most rigorous and portable credential available in the U.S.

Frequently Asked Questions

Can I still become a Registered Dietitian with only a bachelor’s degree?

No. Since January 1, 2024, CDR requires at least a master’s degree to sit for the RD exam. Candidates who completed all requirements before that date under the old bachelor’s-only pathway are still eligible under those rules, but new candidates must meet the graduate degree requirement [1].

How long does it take to become an RD/RDN from start to finish?

Plan on roughly six to seven years: four years for a bachelor’s degree, one to two years for a master’s degree, and 1,000 or more supervised experiential learning hours (often bundled into the graduate program). Exam preparation adds a few weeks to a few months.

What is the difference between an RD, RDN, LDN, and CNS?

RD and RDN are the same credential from CDR; RDN is simply the newer preferred term. LDN (or LD) is a state-issued license to practice dietetics. CNS (Certified Nutrition Specialist) is a separate credential offered by the Board for Certification of Nutrition Specialists and requires a graduate degree plus 1,000 supervised practice hours and its own exam.

Do I have to complete a dietetic internship if my program is a Coordinated Program or Future Education Model?

Coordinated Programs and Future Education Model graduate programs integrate supervised experiential learning into the curriculum, so you complete the required hours as part of the degree rather than in a separate internship match. Confirm with the specific program that its ACEND accreditation includes SEL hours.

Can I practice as a dietitian in every U.S. state with just the RD credential?

Not always. State laws differ. Some states require a separate license (LDN or LD) to practice medical nutrition therapy or use certain titles. Check your state licensure board and the Academy of Nutrition and Dietetics state map before starting a job [3].

The Bottom Line

The RD/RDN credential is the most rigorous nutrition credential in the U.S. and, since 2024, requires a graduate degree in addition to ACEND-accredited coursework, supervised experiential learning hours, and the CDR exam. Verify current requirements at the source before you enroll: rules and hour minimums do change, and state licensure rules add another layer.