1.1 CDR CSR Exam Structure, Eligibility, Logistics & the 2023 Content Outline
Key Takeaways
CSR eligibility requires current RD status with CDR, at least 2 years as an RD by the exam date, and 2,000 renal practice hours as an RD within the past 5 years.
The CSR exam has 150 four-option multiple-choice questions (125 scored, 25 unscored pretest) with a 3-hour limit at Pearson VUE test centers.
The October 2023 CSR content outline has three domains: Nutrition Assessment and Diagnosis (48 items), Intervention and Care Coordination (54), and Quality Management and EBP (23).
CDR sets the CSR passing point with the Angoff method and equates forms, so no fixed percentage cut score is published.
A failed CSR candidate must reauthorize and wait 60 days to retest; the credential lasts 5 years and is renewed by passing the exam again.
Why this orientation matters
The Board Certified Specialist in Renal Nutrition (CSR) is a specialty credential awarded by the Commission on Dietetic Registration (CDR), the credentialing agency of the Academy of Nutrition and Dietetics. CDR describes the renal specialist as a registered dietitian who works directly with adult or pediatric patients who have acute kidney injury, chronic kidney disease (CKD) stages 1–5, or kidney replacement therapy (dialysis or transplant), or who works indirectly in management, education or research linked to renal nutrition. The specialist is responsible for the full Nutrition Care Process: assessment, diagnosis, intervention, monitoring and evaluation.
Knowing the rules of the exam is not trivia. The content outline tells you where the scored items are, the handbook tells you what happens on test day, and the retake rules shape your study calendar. Many commercial prep products still teach the 2012 outline, which had five domains weighted 36/15/25/18/6 percent. That outline was replaced. Study to the current one.
Eligibility
CDR's eligibility page lists three minimum criteria:
- Current Registered Dietitian (RD) status with CDR.
- RD status maintained for at least 2 years from the original RD examination date, counted to the date of the specialty examination (not the application date).
- 2,000 hours of practice experience as an RD in renal nutrition within the past five years. The five-year mark is a ceiling, not a requirement: you document only as far back as needed to reach 2,000 hours. CDR allows certain education and professional experiences to substitute for up to 40% of the hours (800 hours).
Hours from different renal settings count together: in-center or home dialysis, non-dialysis CKD clinics, transplant programs, acute care nephrology and pediatric nephrology all fit the practice definition. You submit the application through MyCDR. The hours must be verified before submission, and CDR and Pearson can take up to two full weeks to process it.
Test-day logistics (CDR Specialist Candidate Handbook, 2026–2027)
| Item | What the handbook says |
|---|---|
| Items | 150 multiple-choice questions: 125 scored and 25 pretest items that cannot be told apart |
| Answer format | Choose the best of four options |
| Time | 3 hours once the timer starts; the appointment is 3 hours 20 minutes including a 20-minute tutorial |
| Vendor and site | Pearson VUE test centers (more than 250 in the U.S. plus select international sites) |
| Scheduling | Year-round (since November 2018); schedule at least 48 hours ahead after the Authorization to Test email |
| Fee | $350, paid by credit card when you schedule with Pearson (CDR's fee page lists no other fee) |
| Authorization window | One year from eligibility approval |
| Calculator | On-screen simple calculator; a handheld test-center calculator on request; no personal calculators |
| Navigation | You must answer the current question before moving to the next one |
| Results | A printed score report at the test center showing pass/fail and content-area performance |
The handbook describes test-center delivery only; it offers no remote-proctored option. You need an unexpired government photo ID whose name matches your Pearson profile. Late arrival forfeits the appointment and the fee.
How the exam is scored
CDR sets the passing point with the Angoff method. A panel of renal subject-matter experts judges how many correct answers a minimally competent specialist needs. Each new form is statistically equated, so the passing score can move slightly with form difficulty. Because the standard is criterion-referenced, your result does not depend on how other candidates perform, and CDR does not publish a fixed percentage cut score. Content-area subscores are diagnostic only. They are not used for the pass/fail decision, and areas with few items give imprecise subscores.
CDR publishes pass rates. For January–June 2026, 76 examinees sat the CSR exam: 68% passed overall, 62% of first-time candidates and 88% of recertifying candidates. Across 2013 to mid-2026, the cumulative pass rate was 74% (1,709 examinees).
If you fail, and how to recertify
- A candidate who fails must reauthorize before testing again. Reauthorization is not automatic.
- The earliest retest is 60 days after the failed attempt. A one-time 60-day waiver is available only with an employer letter stating that passing sooner is required to keep the job.
- If the one-year eligibility window expires during the wait, you must submit a new eligibility application.
- Appeals cover CDR policy decisions such as eligibility. A failing score, test items and content validity cannot be appealed. Appeals must be filed within 30 days and carry a $20 fee.
- Certification lasts 5 years. To recertify you must still be a current RD, submit a new eligibility application with the required specialty hours, pay the fee, and pass the specialist exam again. The new 5-year period starts in the month you pass.
The October 2023 Examination Content Outline
CDR's current CSR outline came from a job analysis (report dated October 2022) and specifies a 125-scored-item exam with three competency areas:
| Domain | Scored items | Share | Topics |
|---|---|---|---|
| 1. Nutrition Assessment and Diagnosis | 48 | 38.4% | Assessments: anthropometric measures; biochemical data; nutrition-focused physical findings; diet history; medical and medications history; medical tests and procedures; psychosocial/social history. Diagnosis: problem, etiology, signs and symptoms |
| 2. Intervention and Care Coordination | 54 | 43.2% | Nutrition intervention, monitoring and evaluation: food and/or nutrient delivery; individualized education and counseling; medications and supplements. Treatments: AKI; CKD 1–5; dialysis (stage 5D); transplant; comorbidities such as diabetes, GI and cardiovascular disease. Care coordination: interdisciplinary team; interfacility coordination; patient and caregiver communication and education; psychosocial support |
| 3. Quality Management and Evidence-Based Practice | 23 | 18.4% | Quality management: regulatory guidelines (e.g., CMS); quality improvement. Evidence-based practice: nutrition guidelines (Academy, KDOQI, KDIGO); current research, clinical practices and protocols |
The outline also lists 28 task statements. Examples include evaluating dialysis adequacy and the mineral content of dialysate, evaluating drug–nutrient interactions, facilitating medication-management protocols, collaborating with outside agencies, and complying with CMS timelines for assessments and plans of care.
How this guide maps to the outline
- Chapters 2–7 (Domain 1): anthropometrics and body composition, physical findings and PEW tools, diet, medical and psychosocial history, modality-specific tests, and PES diagnosis.
- Chapters 8–14 (Domain 2): protein and energy, electrolytes and micronutrients, medications and nutrition support, transplant and comorbidities, monitoring and adequacy, and care coordination.
- Chapters 15–16 (Domain 3): CMS regulations and quality programs, then guidelines, research appraisal and protocols.
Core references CDR lists (reference list updated October 2024)
- KDOQI Clinical Practice Guideline for Nutrition in CKD: 2020 Update (a joint NKF–Academy guideline, also published through the Academy's Evidence Analysis Library).
- KDIGO guidelines, including CKD evaluation and management (2024), CKD-MBD (2017), anemia (the list cites 2012; KDIGO published an updated anemia guideline in 2026), AKI (2012), blood pressure (2012), transplant recipients (2009) and lipids (2013).
- KDOQI hemodialysis adequacy (2015 update), PD adequacy (2006, with the 2021 ISPD update) and diabetes (2022, updated 2024).
- CMS ESRD Conditions for Coverage (2008) and Interpretive Guidance; the ESRD Quality Incentive Program; the Measures Assessment Tool; and State Operations Manual Appendix X for transplant programs.
- The Academy's Clinical Guide to Nutrition Care in Kidney Disease (3rd ed., 2022), the NKF Pocket Guide to Nutritional Assessment of the Patient with Kidney Disease (6th ed., 2021), the National Kidney Diet professional guide (3rd ed., 2023), the eNCPT terminology, the ASPEN nutrition-focused physical exam handbook, Food-Medication Interactions, and the Handbook of Dialysis.
CDR notes that the list is a set of suggestions and that no item is based on any single reference.
Study strategy
Weight your hours to the item counts. Domain 2 carries the most items, so practice turning assessment data into prescriptions, counseling and coordination decisions. Domain 3 is small but predictable: learn CMS timelines, QAPI requirements, ESRD QIP mechanics and how guideline recommendations are graded. Most items are applied scenarios, so work cases rather than memorizing lists.
An outpatient renal dietitian who became an RD 3 years ago is checking CSR eligibility. Over the past 5 years the dietitian documented 1,850 hours of practice as an RD in an in-center hemodialysis unit and 300 hours providing MNT to non-dialysis CKD patients in a nephrology clinic. Does the dietitian meet CDR's minimum criteria?
Yes; the RD credential has been held more than 2 years and the 2,150 hours of renal practice within 5 years exceed the 2,000-hour minimum.
No; clinic hours with non-dialysis CKD patients cannot be combined with dialysis hours toward the specialty requirement.
No; CDR requires 3 years of specialty practice after the RD credential rather than 2 years of RD status.
Yes, but only if at least one quarter of the hours were supervised by a practitioner who already holds the CSR.
A dietitian builds a study calendar from the CSR examination content outline that took effect in October 2023. Which statement about the scored items is correct?
Nutrition Assessment and Re-assessment remains the largest domain at 36%, followed by Nutrition Intervention at 25%.
Quality Management and Evidence-Based Practice is only 6% of the exam, so it can be skipped with little risk.
Intervention and Care Coordination carries the most scored items (54 of 125), ahead of Nutrition Assessment and Diagnosis (48).
Nutrition Monitoring and Evaluation is a separate domain worth 18% of the scored items.
A candidate does not pass the CSR exam on March 3 and wants to retest as soon as possible. According to the CDR Specialist Candidate Handbook, what applies?
The candidate may reschedule the next day because the authorization remains active for one year.
The candidate must reauthorize and may retest 60 days after the failed attempt, unless CDR grants the one-time waiver supported by an employer letter.
The candidate may file an appeal of the failing score within 30 days to have the attempt rescored.
The candidate may skip retesting and keep the credential pathway open by completing 75 specialty CPEUs.
Sections you finish are checked off in the contents.