- The Passing Score Question: What Is Actually Published
- What You Can Verify About the Exam
- Where the Points Live: Blueprint Weights
- Two Lenses on the Same Exam: Domains vs. Tasks
- Judging Readiness Without a Published Cut Score
- Sequencing Your Preparation by Weight
- Score Timing, Award Steps, and Retakes
- Passing Again: The Maintenance Exam
- Frequently Asked Questions
- A numeric passing threshold for the NCCPA Nephrology CAQ exam has not been verified, so treat any specific cut score online with suspicion.
- The exam is 120 multiple-choice questions in two 60-question blocks, with 60 minutes per block and no revisiting a finished block.
- Chronic Kidney Disease carries 20% of content, and End-Stage Renal Disease / Dialysis carries another 17%.
- The Managing Patients task category is 35% of the exam, so treatment decisions matter more than recall.
The Passing Score Question: What Is Actually Published
Every candidate eventually asks the same thing: what number do I need to hit? For the Certificate of Added Qualifications in Nephrology, the honest answer is that a numeric passing threshold has not been verified in the issuer materials reviewed for this article. The credential is awarded by the National Commission on Certification of Physician Assistants (NCCPA), and the award requires a passing specialty-exam result plus completion of the non-exam requirements. What the public materials do not give you is a clean "you need X correct out of 120" figure.
That matters because the internet is full of confident-sounding claims. Some test-prep sites quote a percentage cut, a scaled score, or a pass rate for this credential. None of those have been verified here, and this article will not repeat them. An official specialty-specific pass rate has not been verified either; if you want context on that, see our discussion of the PA-CN pass rate and what the data shows.
One more clarification so you are studying for the right exam. "PA-CN" is the shorthand used on this site for NCCPA's Certificate of Added Qualifications in Nephrology, designated PA-C, CAQ-Neph. It is a specialty credential for physician assistants who already hold PA-C. It is not initial PA-C certification, a nephrology nursing credential, or a physician nephrology board exam. If you are still sorting out the terminology, what PA-CN is covers the basics.
What You Can Verify About the Exam
While the cut score is not published in the materials reviewed, the testing mechanics are well documented. Knowing them removes surprises on test day and clarifies what "passing" has to survive.
| Feature | Initial Nephrology CAQ Exam |
|---|---|
| Issuer | NCCPA |
| Test provider | Pearson VUE test centers |
| Questions | 120 multiple-choice |
| Structure | Two blocks of 60 questions |
| Time | 60 minutes per block (two hours total) |
| Tutorial and break | 15-minute tutorial and 15-minute break, excluded from the exam timer |
| Reference materials | Closed book; personal calculators, notes, and books prohibited |
| Revisiting questions | Not allowed after a block is finished |
| Initial fee | USD $350 total ($100 registration/administration plus $250 examination) |
Two details deserve emphasis. First, you cannot return to a finished block, so each 60-question block is a commitment. You need a pacing habit that works at roughly one minute per question, with a plan for flagging and revisiting only within the block you are currently in. Second, the exam is closed book with no personal calculators, so any quantitative reasoning, such as estimating a fractional excretion or interpreting an anion gap, has to be done by hand or in your head.
For the full cost picture, including what the fee does and does not cover, see the PA-CN certification cost breakdown. For eligibility, the PA-CN requirements guide walks through the prerequisites in detail.
Where the Points Live: Blueprint Weights
Without a published cut score, the single most useful quantitative tool you have is the NCCPA Content Blueprint for the Nephrology CAQ Examination. It is a short document, but it tells you how the 120 questions are distributed. The blueprint is undated, so no exam edition or effective year should be inferred from it; treat it as the current official scope statement.
The eleven medical content categories, with their weights, are:
| Content Category | Weight |
|---|---|
| Chronic Kidney Disease | 20% |
| End-Stage Renal Disease / Dialysis | 17% |
| Renal Pathophysiology | 14% |
| Acute Kidney Injury/Intensive Care Unit Nephrology | 11% |
| Hypertension | 10% |
| Glomerular Disorders | 6% |
| Systemic Disorders | 6% |
| Tubulointerstitial/Viral Disorders | 5% |
| Kidney Transplantation | 5% |
| Vascular Disorders | 3% |
| Legal/Ethical Issues and Emerging Topics | 3% |
Notice the concentration. The top four categories, Chronic Kidney Disease, End-Stage Renal Disease / Dialysis, Renal Pathophysiology, and Acute Kidney Injury/Intensive Care Unit Nephrology, account for 62% of the content. Add Hypertension at 10% and you reach 72% with just five categories. The remaining six categories share the other 28%.
The examples listed beneath each category in the blueprint are illustrative, not exhaustive. A question can fall inside a category without matching any listed example, so use the examples as a starting point rather than a boundary. For a deeper walkthrough of each category, read the complete guide to all 11 PA-CN content areas.
Two Lenses on the Same Exam: Domains vs. Tasks
This is the part candidates most often get wrong. The blueprint classifies the exam in two separate ways at once. The eleven medical categories above describe what the question is about. A second distribution describes what you are being asked to do with that knowledge.
| Task Category | Weight |
|---|---|
| History and Physical | 7% |
| Diagnostic Studies | 20% |
| Diagnosis | 25% |
| Managing Patients (including Health Maintenance, Clinical Intervention, and Pharmaceutical Therapeutics) | 35% |
| Applying Scientific Concepts | 10% |
| Legal/Ethical Issues and Emerging Topics | 3% |
These six tasks cross-classify the same 120 questions. They are not six extra medical domains, and you must not add the 35% management allocation to the medical-content weights. A single question might be a Chronic Kidney Disease question (content) that tests Managing Patients (task), for example choosing among pharmacologic options for a patient with CKD and a specific complication.
What the 35% Managing Patients weight implies
More than a third of the exam asks what you would do, not what you know. That includes health maintenance, clinical intervention, and pharmaceutical therapeutics.
- Expect to choose between plausible next steps, not just identify a diagnosis.
- Medication selection, dosing considerations in reduced kidney function, and interactions are fair game.
- Health maintenance in nephrology populations, such as vaccination and complication surveillance in CKD and dialysis patients, belongs here.
What the 45% Diagnosis plus Diagnostic Studies weight implies
Diagnostic Studies (20%) and Diagnosis (25%) together make up 45% of the exam.
- You must interpret urinalysis, urine chemistries, imaging results, and laboratory patterns, then connect them to a diagnosis.
- Expect clinical vignettes where the data points to a specific glomerular, tubulointerstitial, or hemodynamic process.
Because the Legal/Ethical Issues and Emerging Topics label appears in both lists at 3%, remember it as one thin slice rather than double-counting it. It is small, but it is also among the cheapest points to secure with focused review.
Judging Readiness Without a Published Cut Score
If you cannot aim at a number, aim at evidence. The official preparation materials are the best instruments available, and they come from the same organization that writes the exam.
- NCCPA Sample Nephrology Questions and Critiques (copyright 2024): sample items with explanations of why answers are right or wrong. Work these first, because the critiques teach you how the exam reasons.
- The optional NCCPA practice exam ($50): NCCPA lists one practice form for this specialty, with a 180-day completion window. It provides educational feedback.
Key Takeaway
NCCPA states that the practice exam's educational feedback does not predict an exam pass. Use it to find weak categories, not to forecast success. A comfortable practice result is not a guarantee, and a rough one is not a verdict.
That caveat is important. Any commercial claim that a practice score maps to a passing score for this credential is unsupported by the issuer's own statement. The same goes for pass guarantees, which are not adopted here. A more reliable readiness signal is consistency: can you handle questions across all eleven categories, including the small ones, without leaving obvious gaps?
If you want a sense of how demanding the exam is before committing, how hard the PA-CN exam is covers difficulty in more depth, and our PA-CN study guide lays out a full first-attempt approach. You can also work through realistic items on the main practice test site to pressure-test your reasoning in exam-style format.
Sequencing Your Preparation by Weight
This is the one place where scheduling advice belongs, and it is tied directly to the blueprint rather than to a generic template. The logic: give the heaviest categories the earliest and longest attention, then close gaps in the thin ones.
Chronic Kidney Disease (20%)
- Staging, progression, and complication management.
- Pre-dialysis planning and medication adjustment in reduced kidney function.
- Start the official sample questions and critiques to calibrate style.
End-Stage Renal Disease / Dialysis (17%) and Kidney Transplantation (5%)
- Dialysis modalities, access, adequacy, and complications.
- Transplant follow-up and immunosuppression considerations.
Renal Pathophysiology (14%) and Acute Kidney Injury/ICU Nephrology (11%)
- Acid-base, electrolytes, and volume reasoning you can do without a calculator.
- AKI evaluation and inpatient and critical-care scenarios.
Hypertension (10%) plus the smaller categories
- Glomerular Disorders, Systemic Disorders, Tubulointerstitial/Viral Disorders, and Vascular Disorders.
- Legal/Ethical Issues and Emerging Topics for quick, low-cost points.
- Take the optional NCCPA practice exam late in this window to find residual gaps.
Eight weeks is an illustration, not a requirement. Candidates working in nephrology daily may compress the early weeks, while those who practice in a narrower setting may need more time on categories outside their routine. Because the blueprint is cross-classified by task, practice interleaving your review: for every topic, ask what you would order, what you would conclude, and what you would prescribe.
Score Timing, Award Steps, and Retakes
Passing the exam is necessary, but the credential is awarded only after both the exam result and the non-exam requirements are complete. Those requirements include the nephrology-focused CME and the attestation from a collaborating physician or lead/senior PA. The attestation may be submitted before the exam or within 90 days after score notification, so a delay in paperwork does not have to delay your testing. Full prerequisite details are in the requirements guide.
- Score reporting: scores generally arrive eight to ten weeks after administration, following validation. Do not expect a same-day result.
- Completion window: the initial CAQ process must be completed within six years after initiation.
- Scheduling: testing is through Pearson VUE test centers; there is no remote option for the initial exam. See PA-CN exam dates and scheduling for planning.
A retake policy summary is outside the verified scope of this article. Confirm current retake rules directly with NCCPA before you register, since policies are revised periodically.
Passing Again: The Maintenance Exam
Passing the initial exam is not the end of the story. The CAQ is valid for ten years while your PA-C status and licensure remain current. Renewal requires 125 nephrology Category I CME credits earned during the cycle and submitted by the maintenance-exam application, plus passing the specialty examination again.
| Feature | Initial Exam | Maintenance Exam |
|---|---|---|
| Format | Test center only | Test center or online |
| Questions | 120 | 120 |
| References | Closed book | Online version allows references; no assistance from others |
| Timing | 60 minutes per 60-question block | Online version allows five minutes per question within an approximately six-week window |
| Attempts | Per NCCPA policy | Three maintenance attempts in years nine and ten under the May 2026 governing policy |
The online option applies to maintenance only; it is not an initial remote testing path. There is also a policy inconsistency worth knowing about: the May 2026 governing policy says passing before year nine can reset the cycle, while the online-maintenance policy says before year ten. If a ninth-year pass matters to your timing, obtain confirmation from NCCPA rather than assuming either statement.
Frequently Asked Questions
A numeric passing threshold has not been verified in the issuer materials reviewed. The award requires an NCCPA passing specialty-exam result, but you should not rely on any specific cut score quoted by third parties. Study the full blueprint instead.
The initial exam has 120 multiple-choice questions in two 60-question blocks, with 60 minutes per block. A 15-minute tutorial and 15-minute break are excluded from the exam timer, and you cannot revisit questions in a finished block.
Chronic Kidney Disease is the largest at 20%, followed by End-Stage Renal Disease / Dialysis at 17%, Renal Pathophysiology at 14%, and Acute Kidney Injury/Intensive Care Unit Nephrology at 11%. Hypertension adds 10%.
No. The six task categories, including Managing Patients at 35%, cross-classify the same exam as the eleven medical categories. They are two views of the same 120 questions, not additional content areas.
Scores generally arrive eight to ten weeks after administration, following validation. The credential is awarded once you have both a passing result and completed non-exam requirements. For overall value considerations, see whether the PA-CN certification is worth it.