- The Headline Numbers From CDR
- Reading the Three Candidate Groups
- Why 76 Examinees Calls for Caution
- How the Passing Standard Works
- Why First-Time Candidates May Struggle More
- Where the Scored Items Sit
- The Eligibility Filter Behind the Numbers
- Turning the Data Into a Prep Plan
- If You Miss: Retake Mechanics
- Frequently Asked Questions
- CDR reported a 68% overall CSR pass rate for January-June 2026, based on 76 examinees.
- First-time candidates passed at 62% (39 examinees); recertification candidates passed at 88% (25 examinees).
- The exam has 125 scored items plus 25 unscored pretest items; no fixed percentage pass mark is published.
- Intervention and Care Coordination carries the most scored items at 54, so it deserves the largest share of study time.
The Headline Numbers From CDR
The Commission on Dietetic Registration publishes pass/fail statistics for the Board Certified Specialist in Renal Nutrition (CSR) examination, and the most recent figures cover January through June 2026. They are the only pass-rate data this article relies on, and they are worth reading carefully rather than skimming for a single number.
| Candidate Group (Jan-Jun 2026) | Pass Rate | Examinees |
|---|---|---|
| Overall | 68% | 76 |
| First-time test takers | 62% | 39 |
| Recertification candidates | 88% | 25 |
Put simply: roughly two of every three candidates passed overall, but the experience differed sharply depending on whether the candidate was sitting the exam for the first time or renewing an existing credential. If you are weighing how demanding the credential is, pair this data with our complete difficulty guide for the CSR exam.
Reading the Three Candidate Groups
The three rows in the table are not interchangeable, and each answers a different question.
Overall: 68%
This is the blended figure across everyone who tested in the period. It is the number most often quoted, but it mixes two very different populations: people attempting the credential for the first time and credentialed specialists renewing.
First-time: 62%
If you are a prospective candidate pursuing initial certification, this is the closest published benchmark to your situation. It is lower than the overall rate, which tells you the blended number slightly flatters your odds.
Recertification: 88%
Renewal candidates already hold the credential and, by definition, have documented at least 2,000 renal specialty hours within the preceding five years. Their higher pass rate is consistent with sustained daily exposure to the exam's subject matter. For context on how renewal works, see the cost and requirements discussion in our CSR certification cost breakdown.
Why 76 Examinees Calls for Caution
A pass rate computed from 76 people is a snapshot, not a stable trend line. With the first-time group at 39 and recertification at 25, a handful of additional passes or failures would move those percentages noticeably. That does not make the data useless, but it does mean you should avoid over-interpreting small differences.
- Do not compare periods too tightly. A shift of a few percentage points between reporting periods can reflect ordinary variation in a small cohort.
- Do not treat 62% as your personal probability. Your preparation, clinical background, and test-taking approach matter more than a cohort average.
- Do not assume the exam is easy because 68% passed. About one in three overall candidates did not pass in this period.
Key Takeaway
Use the pass rate as a sanity check on the credential's seriousness, not as a prediction. A first-time rate of 62% says a meaningful share of qualified RDs still fail on the first attempt, which is a reason to prepare deliberately.
How the Passing Standard Works
Many candidates assume there is a magic percentage, such as 70% or 75%, that separates pass from fail. For the CSR exam, no fixed percentage pass mark is asserted. The passing standard is set through an Angoff passing-point study, a criterion-referenced method in which subject-matter experts judge how a minimally competent specialist would perform on each item. Statistical equating is then applied across exam forms so that candidates are held to the same standard regardless of which form they receive.
Two practical implications follow:
- You cannot reverse-engineer a safe number of questions to answer correctly. Aiming for a particular raw percentage is guesswork.
- Because the standard is equated across forms, a harder-feeling form is not a disadvantage; the passing point adjusts to maintain consistency.
For a deeper treatment of what scoring does and does not tell you, read our explainer on the CSR passing score.
Why First-Time Candidates May Struggle More
The published data does not explain why first-time candidates pass at a lower rate, so any explanation is inference. That said, several features of the CSR exam plausibly contribute, and they are worth knowing regardless.
Format pressure
The traditional exam contains 150 multiple-choice questions: 125 scored items and 25 unscored pretest items, with four options and one best answer. Candidates do not know which items are unscored, so every question must be treated as live. Testing time is 3 hours inside a 3-hour-20-minute appointment that includes a 20-minute tutorial. Unscheduled breaks count against testing time, which rewards pacing discipline.
Closed-book, calculation-ready
The exam is closed book. An on-screen calculator and an erasable note board are provided, and a test-center handheld calculator may be available on request. Personal calculators are prohibited. Candidates who rehearse with their own devices and formulas but never practice with an on-screen calculator can lose time on test day.
Breadth beyond one setting
Preparation spans acute kidney injury, chronic kidney disease, dialysis, transplantation, care coordination, and quality management. Dietitians who work primarily in outpatient maintenance dialysis sometimes underestimate how much of the content lives outside that setting. Our CSR study guide maps this breadth into a workable plan.
Where the Scored Items Sit
CDR's CSR Examination Content Outline (copyright 2023, effective October 2023) publishes the number of scored items per domain rather than percentage weights. The allocations, in domain order, are 48, 54, and 23, totaling 125 scored items. The three domains are:
Domain 1: Nutrition Assessment and Diagnosis (48 scored items)
Expect questions that ask you to interpret the clinical picture and identify the correct nutrition diagnosis across the renal continuum.
- Assessing patients across AKI, CKD, dialysis, and transplant settings
- Interpreting laboratory data and clinical indicators relevant to kidney disease
- Distinguishing which finding changes the nutrition priority
Domain 2: Intervention and Care Coordination (54 scored items)
This is the largest domain by scored-item count, and it rewards candidates who can choose the best action among plausible options.
- Selecting and individualizing nutrition interventions by treatment modality
- Coordinating care with the interdisciplinary renal team
- Education and counseling decisions for patients and caregivers
Domain 3: Quality Management and Evidence-Based Practice (23 scored items)
The smallest domain, but not one to skip: with 23 scored items, it still represents a meaningful portion of the exam.
- Applying evidence-based guidance to practice decisions
- Quality improvement concepts in renal nutrition programs
- Outcomes monitoring and program evaluation
Because these are official item counts, this article does not convert them into percentages that CDR has not published. For a full domain-by-domain walkthrough, see our CSR exam domains guide.
The Eligibility Filter Behind the Numbers
An often-overlooked point when reading pass rates: the candidate pool is already filtered. To sit the exam, you must hold current RD status with CDR, maintained for at least two years by the specialty exam date, and document 2,000 renal nutrition practice hours as an RD within the five years preceding application. Approved education and professional substitutions may cover up to 800 hours (40%), and specialty hours require verification.
This means a 62% first-time pass rate describes experienced, vetted dietitians, not a general population of students. A candidate with years of renal practice still fails nearly four in ten times on a first attempt in this reporting period, which underscores that clinical experience alone is not a substitute for exam-specific preparation. The full prerequisites are covered in our CSR requirements guide.
Turning the Data Into a Prep Plan
The pass-rate data points to a few concrete preparation priorities. Rather than generic study advice, tie your schedule to the exam's own structure.
Domain 1 and setting gaps
- Review assessment and diagnosis across AKI, CKD, dialysis, and transplant
- Identify the setting where your daily practice leaves you weakest
Domain 2, the heaviest block
- Spend the most time on Intervention and Care Coordination (54 scored items)
- Practice best-answer selection where several options look reasonable
Domain 3 and timed practice
- Cover Quality Management and Evidence-Based Practice (23 scored items)
- Run timed sets using an on-screen calculator to mirror test conditions
Handle the reference list with care
CDR publishes a suggested-reference list dated October 2024 for the exam. It includes multiple guideline years, including older and newer CKD guidance, so note the edition dates rather than assuming every listed document is the latest clinical guideline. The resources are suggestions, not an exhaustive syllabus or guaranteed exam coverage, and CDR does not endorse a particular preparation product.
Practice questions that mirror the four-option, one-best-answer format help you build stamina for 150 items. You can start with the CSR practice tests on our main site, and keep our one-page CSR cheat sheet nearby for final review.
If You Miss: Retake Mechanics
The exam fee is $350, payable when scheduling, and delivery is through Pearson VUE test centers year-round. If you do not pass, the ordinary retest interval is 60 days, and reauthorization is required before you can test again. That means a failed attempt costs both money and at least two months, so the economics favor being ready the first time.
| Factor | What CDR Specifies |
|---|---|
| Exam fee | $350, payable when scheduling |
| Delivery | Pearson VUE, year-round, computer-based |
| Ordinary retest interval | 60 days |
| Before retesting | Reauthorization required |
Scheduling flexibility helps here, since there are no fixed testing windows; see the CSR exam dates guide for how scheduling works. Because every dollar and week counts, run a full set of timed practice questions before you book.
Renewal is a separate exam, not a CE exercise
The specialist cycle is five years. Renewal requires maintaining RD status, submitting the eligibility application documenting 2,000 renal specialty hours within the preceding five years (with permitted substitutions), paying the fee, and passing the specialist exam. Continuing education alone does not replace the renewal examination, and ongoing RD professional-development requirements are separate. CSR is also not included in the published CSO/CSSD longitudinal-assessment pilot. The higher 88% recertification pass rate suggests renewal candidates benefit from sustained practice, but they still must pass.
Frequently Asked Questions
CDR reported an overall pass rate of 68% for January-June 2026, based on 76 examinees. First-time candidates passed at 62% (39 examinees) and recertification candidates at 88% (25 examinees). Check CDR's pass/fail statistics page for any newer reporting period.
No fixed percentage pass mark is asserted. The standard comes from an Angoff passing-point study with statistical equating across forms, so you cannot rely on a target raw percentage. See the CSR passing score guide for details.
CDR's data reports the rates but not the reasons. Plausible factors include the exam's breadth beyond maintenance dialysis and the fact that renewal candidates have recently documented substantial renal practice hours, but this is interpretation rather than published fact.
Treat the figures as a snapshot. With 76 total examinees, small changes in outcomes can shift the percentages noticeably, so avoid reading too much into period-to-period differences.
There are 150 multiple-choice questions, of which 125 are scored and 25 are unscored pretest items. Testing time is 3 hours within a 3-hour-20-minute appointment that includes a 20-minute tutorial. Unscheduled breaks count against testing time.
The ordinary retest interval is 60 days, and reauthorization is required before you can test again. A new $350 fee applies when you schedule. Reviewing the ROI analysis of the CSR certification can help you decide how to approach a second attempt.
The CSR pass-rate data tells a measured story: most qualified candidates pass, a substantial minority do not, and first-time candidates face the toughest odds. Prepare against the exam's actual structure, weight your effort toward the 54-item Intervention and Care Coordination domain, and treat the published percentages as context rather than a forecast.