Food shapes health. Diabetes, heart disease, obesity, and eating disorders all connect back to what people eat. A registered dietitian (RD) sits at the center of that connection, turning nutrition science into real treatment plans for real patients.
This guide breaks down exactly how to become a registered dietitian, step by step, using the current education rules set by the Commission on Dietetic Registration (CDR). It also covers something most guides skip entirely: whether an RD can legally work locum tenens (short-term contract) roles through a healthcare staffing agency, across different healthcare settings and what that looks like in practice.
What Is a Registered Dietitian (RDN)?
A registered dietitian is a food and nutrition expert who holds a national credential from the Commission on Dietetic Registration (CDR), the credentialing body of the Academy of Nutrition and Dietetics. The credential can be listed as either RD or RDN (registered dietitian nutritionist) both terms mean the exact same thing. Neither title carries more authority than the other; RDN simply reflects the broader “nutritionist” scope of the role.
RDs work across the healthcare system. They:
- Assess a patient’s nutritional status and medical history
- Build medical nutrition therapy (MNT) plans for chronic conditions
- Counsel patients one-on-one or in group settings
- Coordinate care with physicians, nurses, and behavioral health teams
- Document care in a patient’s medical record
Because RDs handle protected health information (PHI) in clinical settings, every patient interaction, chart note, and care plan must stay HIPAA compliant, following the same privacy and security rules that apply to physicians and nurses.
Registered Dietitian vs. Nutritionist: Know the Difference
This is one of the most searched questions in the field, and most sites blur the line. Here’s the clear version.
| Registered Dietitian (RD/RDN) | Nutritionist | |
| Credential | National CDR credential | No standard national credential |
| Regulation | Regulated in most states | “Nutritionist” title is unregulated in many states |
| Education | Accredited graduate degree + supervised practice | Varies widely; can be self-taught or certificate-based |
| Legal scope | Can provide medical nutrition therapy and bill insurance | Cannot always provide clinical treatment |
Every registered dietitian can legally call themselves a nutritionist, but not every nutritionist can call themselves a dietitian. That one-way relationship is the core of the registered dietitian vs nutritionist debate.
In several states, including Texas, Florida, and California, using the title “dietitian” without CDR credentials and state licensure is illegal.
Steps to Become a Registered Dietitian
Becoming a dietitian follows four fixed steps set by CDR and the Accreditation Council for Education in Nutrition and Dietetics (ACEND). Skipping or reordering these steps isn’t possible; CDR checks every applicant’s paperwork against this exact sequence.
Step 1: Complete an ACEND-Accredited Graduate Degree
As of January 1, 2024, CDR raised the minimum education requirement from a bachelor’s degree to a graduate degree (master’s or doctoral). This is the single biggest change in the field in over a decade, and many older guides still describe the outdated bachelor’s-only path.
Key facts about dietitian schooling:
- The degree must come from a USDE-accredited institution (or a recognized foreign equivalent)
- The graduate degree does not have to be in nutrition; an MBA, MPH, or master’s in counseling can qualify, as long as the required Didactic Program in Dietetics (DPD) coursework is also completed
- Coursework covers biochemistry, anatomy, physiology, food science, and clinical nutrition
- Students who were already registration-eligible before December 31, 2023, are grandfathered in and don’t need the graduate degree
Two common program formats exist:
- Coordinated Programs (CP): combine coursework and supervised practice into one 2–3 year graduate track
- Didactic Program in Dietetics (DPD) + separate internship: academic coursework first, supervised practice second
Step 2: Complete Supervised Practice (Dietetic Internship)
After coursework, every candidate completes a supervised practice program, commonly called a dietetic internship (DI). This typically runs 1,000+ hours (often around 1,200 hours) inside real clinical, community, and food-service settings.
During this stage, students rotate through:
- Hospital clinical nutrition units
- Outpatient nutrition clinics
- Community health and public health nutrition programs
- Food service management operations
Step 3: Pass the CDR Registration Examination for Dietitians
Once education and supervised practice are verified, candidates sit for the Registration Examination for Dietitians, often called the RD exam or CDR exam. A few essentials:
- Administered through Pearson VUE at 250+ US test centers
- Exam fee runs around $200–$250
- First-time pass rates typically land in the mid-to-high 60% range, varying by pathway
- Passing this exam is what officially earns the RD/RDN credential
Step 4: Get State Licensure
Passing the national exam is not the final step. Most states require a separate state license or certification to legally practice as a dietitian, issued through a state licensing board (often housed within the state’s Department of Health rather than a medical board, since dietetics has its own dedicated licensing structure in most states). Requirements vary:
- Some states require only the CDR credential plus a licensing application and fee
- A handful of states have no licensure requirement at all
- Reciprocity between states is common but never automatic, always confirm with the destination state’s licensing board before relocating or accepting travel work
How to Become a Registered Dietitian: Quick Checklist
✓ Earn a bachelor’s degree with DPD prerequisite coursework
✓ Complete an ACEND-accredited graduate degree (required since Jan. 1, 2024)
✓ Finish an ACEND-accredited supervised practice program (dietetic internship)
✓ Pass the CDR Registration Examination for Dietitians
✓ Apply for state licensure in the state(s) where you plan to practice
✓ Maintain credentials through continuing professional education (CPE) units
Registered Dietitian Requirements Summary
For anyone searching for registered dietitian requirements or requirements to become a registered dietitian, here’s the condensed version:
- Graduate degree from a USDE-accredited school (post-2024 candidates)
- ACEND-accredited didactic coursework
- Supervised practice hours through an accredited internship
- Passing score on the CDR national exam
- Active state license where required
- Ongoing continuing education to keep the credential active
Registered Dietitian Job Description and Duties
A typical registered dietitian job description may include:
- Conducting nutrition assessments and diagnosing nutrition-related problems
- Designing individualized meal plans for chronic disease management
- Providing a registered dietitian for diabetes care, including carbohydrate counting and insulin-to-carb ratio education
- Supporting registered dietitians for weight loss and registered dietitian for weight gain programs, tailored to metabolic needs rather than generic diet trends
- Managing enteral and parenteral nutrition support for hospitalized patients
- Educating patients and families on food allergies, intolerances, and therapeutic diets
- Collaborating with physicians, nurses, and behavioral health staff as part of a coordinated care team
Common registered dietitian duties vary slightly by setting. A clinical hospital RD focuses on acute care nutrition support, while a community RD runs group education sessions on budget-friendly, healthy eating.
Can a Registered Dietitian Work Locum Tenens?
Yes. Registered dietitians can legally work locum tenens (short-term, contract-based) positions across the United States. This is confirmed by active job postings and staffing agencies specializing in allied health locum placements. Unlike physicians, RDs generally don’t need a separate multi-state compact but they still need an active, unrestricted state license or applicable licensing exemption in every state where they physically practice.
Locum dietitian work looks different depending on the care setting:
Hospitals (state and private):
RDs cover inpatient units on a temporary basis, managing medical nutrition therapy, tube feeding orders, and discharge nutrition planning. Credentialing through the hospital’s medical staff office is required before the first shift, even for short-term contracts.
Outpatient clinics:
Locum RDs step in for maternity leave coverage, vacancy gaps, or seasonal demand spikes. Credentialing is usually faster here than in hospital settings.
Behavioral health centers:
RDs supporting eating disorder programs or psychiatric facilities need experience with therapeutic meal support and close coordination with mental health clinicians. Some behavioral health settings require additional trauma-informed care training before starting.
Correctional facilities:
State and federal correctional facilities regularly contract locum RDs to manage inmate nutrition programs. These roles typically require a security clearance or background check in addition to standard state licensure, and orientation covers facility-specific safety protocols.
Staffing note:
Locum tenens agencies typically assist with license verification and credentialing paperwork for contract RDs, and many include malpractice coverage as part of the placement — shortening the time between accepting an assignment and starting work. Confirm coverage details with the specific agency before accepting an assignment. See What is the Locum Tenens Staffing Model?
Registered Dietitian Salary and Employment Outlook
According to the Occupational Outlook Handbook, published by the U.S. Bureau of Labor Statistics::
- Median registered dietitian salary: $73,850 per year
- Lowest 10% earn under $48,830; highest 10% earn over $101,760
- About 90,900 dietitian and nutritionist jobs exist nationwide
- Registered dietitian employment is projected to grow 6% from 2024 to 2034, faster than the average for all occupations
- Roughly 6,200 job openings are projected each year through the decade
The starting salary for a registered dietitian typically falls between $48,000 and $61,000, depending on state, work setting, and cost of living. Clinical hospital roles and specialty certifications (like oncology or nutrition support) tend to push pay higher than entry-level community positions.
For anyone tracking registered dietitian jobs, hospitals remain the largest employer, followed by outpatient care centers, government health agencies, and nursing/residential care facilities.
How to Become a Nutritionist vs. a Registered Dietitian
Searches for how to become a nutritionist and how to become a registered nutritionist often overlap with dietitian searches, but the paths diverge:
- Becoming a dietitian requires the CDR-regulated path above, degree, internship, exam, license
- Becoming a general nutritionist can mean earning a Certified Nutrition Specialist (CNS) credential, a state-specific nutritionist license, or simply a nutrition-related degree without national credentialing
- Only the RD/RDN pathway allows a provider to bill insurance for medical nutrition therapy in most states
Anyone planning to work in a hospital, insurance-billed outpatient clinic, or any regulated clinical setting should pursue the RD/RDN path, not a general nutritionist certificate.
Key Takeaways
- Becoming a registered dietitian now requires a graduate degree (as of January 1, 2024), supervised practice hours, and a passing CDR exam score
- RD and RDN are the same credential — no functional difference exists between them
- State licensure is a separate, mandatory step in most states, on top of national CDR registration
- RDs can legally work locum tenens roles, with credentialing requirements that shift by setting — hospitals, outpatient clinics, behavioral health centers, and correctional facilities each carry different onboarding steps
- Median salary sits at $73,850, with 6% job growth projected through 2034
Frequently Asked Questions
How long does it take to become a registered dietitian?
Most candidates need 6–7 years total: 4 years for a bachelor’s degree, 2 years for the required graduate degree (often combined with internship hours), plus exam prep time.
Registered dietitian vs nutritionist, which one should someone become?
Anyone planning to diagnose nutrition problems, bill insurance, or work in a hospital needs the RD/RDN credential. A general nutrition coaching or wellness career can proceed without it, but the scope of practice stays limited.
Is a registered dietitian a licensed medical provider?
An RD isn’t a physician, but most states classify RDs as licensed healthcare providers for nutrition-specific care, distinct from but working alongside physicians and nurse practitioners.
Do all states require dietitian licensure?
No. Most states require licensure or certification through a state licensing board, but a small number of states have no formal licensure requirement. Always verify current rules directly with the target state before practicing.
