- What PA-CN Actually Refers To
- Who Issues It and What the Credential Signals
- The Eligibility Stack: Hours, CME, and Attestation
- Inside the 120-Question Exam
- The Content Map: 11 Domains and 6 Task Areas
- Fees, Scoring Timeline, and Award
- Ten-Year Validity and Maintenance
- A Domain-Driven Preparation Sequence
- Where the Credential Fits in Practice
- Frequently Asked Questions
- PA-CN here means NCCPA's Certificate of Added Qualifications in Nephrology, designated PA-C, CAQ-Neph, not initial PA certification.
- Eligibility requires 4,000 total PA practice hours, with at least 2,000 in nephrology, plus 75 nephrology Category I CME credits.
- The exam has 120 multiple-choice questions in two timed 60-question blocks, and finished blocks cannot be revisited.
- Chronic Kidney Disease carries 20% of the content blueprint, followed by ESRD/Dialysis at 17% and Renal Pathophysiology at 14%.
What PA-CN Actually Refers To
"PA-CN" is the shorthand used on this site for the Certificate of Added Qualifications in Nephrology, a specialty credential for physician assistants. The official designation that appears after a certified PA's name is PA-C, CAQ-Neph. If you see "PA-CN" elsewhere online, be careful: the same letters are attached to other, unrelated credentials. Everything in this article describes the nephrology CAQ for PAs and nothing else.
That distinction matters for three common mix-ups:
- It is not initial PA certification. You must already hold a current PA-C before you can pursue it. The CAQ sits on top of the PANCE-based credential rather than replacing it.
- It is not a nursing credential. Nephrology nursing and nurse-practitioner certifications are issued by different bodies with different eligibility and exam specifications.
- It is not a physician board exam. It is designed around PA practice in nephrology settings, not the nephrology fellowship board pathway.
For alternate phrasings of the same question, see our explainers on what PA-CN stands for and the meaning of PA-CN.
Who Issues It and What the Credential Signals
The credential is issued by the National Commission on Certification of Physician Assistants (NCCPA) as part of its specialty certificate program. Initial testing is delivered at Pearson VUE test centers. The CAQ is an added qualification: it documents that a PA who already holds a current PA-C has met experience, continuing-education, attestation, and examination requirements specific to nephrology.
The Eligibility Stack: Hours, CME, and Attestation
Eligibility is layered, and the most frequent source of confusion is the hours requirement. Read it carefully before you plan a timeline. The full breakdown lives in our PA-CN requirements guide; here is the working summary.
| Requirement | What the issuer specifies |
|---|---|
| Base credential | Current PA-C |
| Licensure | Unrestricted U.S. PA licensure or unrestricted government-agency practice privileges; all held licenses must be unrestricted |
| Practice hours | 4,000 total PA practice hours, including at least 2,000 in nephrology, within six years before attesting the experience requirement is satisfied |
| CME | 75 nephrology-focused Category I credits in the six years before exam application, including at least 25 in the preceding two years |
| ACLS | Recommended, not an additional mandatory course |
| Attestation | Signed by a collaborating physician or lead/senior PA in nephrology who knows your practice |
| Completion window | Initial CAQ process must be completed within six years after initiation |
How the attestation works
A collaborating physician or lead/senior PA who works in nephrology and is familiar with your practice completes the procedural and patient-management attestation. A physician or PA postgraduate program director may sign for a PA who is enrolled in, or graduated from, that program. The form addresses relevant knowledge and performance, including management within at least one of these settings: end-stage renal disease, chronic kidney disease, kidney transplantation, or acute inpatient dialysis.
Two practical points stand out. First, you do not need to work in every nephrology subspecialty; one listed setting suffices. Second, there is no separate timed practical assessment. The attestation may be submitted before the exam or within 90 days after score notification, which gives you flexibility if your signer is hard to reach before test day.
Inside the 120-Question Exam
The initial exam is 120 multiple-choice questions divided into two blocks of 60, with 60 minutes per block. The two-hour clock does not include the 15-minute tutorial or the 15-minute break. Several format rules shape how you should practice:
- Closed book. Personal calculators, notes, and books are prohibited. You must be fluent in anion gap, fractional excretion, and corrected-sodium reasoning without outside aids.
- No revisiting finished blocks. Once you complete a 60-question block, you cannot go back. Use the flag-and-return function within a block, then commit to your answers before moving on.
- About one minute per item. With 60 questions in 60 minutes, long vignettes with labs leave little room for rereading. Practice extracting the decision point quickly.
For how this format translates into real difficulty, read how hard the PA-CN exam is. For the scoring side, our passing score article and pass rate article explain what has and has not been verified. In short, a numeric passing threshold and an official specialty-specific pass rate were not verified, so treat any commercial claim of either with skepticism.
The Content Map: 11 Domains and 6 Task Areas
NCCPA's content blueprint for the nephrology CAQ lists eleven medical content categories. The examples the blueprint gives beneath each category are illustrative, not exhaustive, so do not treat them as a complete syllabus. The full domain-by-domain discussion is in our exam domains guide.
| Domain | 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% |
Chronic Kidney Disease (20%)
The single largest category, and the one most closely tied to day-to-day outpatient nephrology. Expect questions on staging, progression, complications, and long-term management.
- Interpreting eGFR and albuminuria together rather than in isolation
- Managing CKD complications such as anemia, mineral and bone disorder, acidosis, and electrolyte abnormalities
- Choosing and adjusting medications in reduced kidney function
End-Stage Renal Disease / Dialysis (17%)
Second in weight. Candidates should be comfortable with the full spectrum of kidney replacement therapy decisions and the complications that accompany them.
- Modality considerations and access-related issues
- Dialysis-associated complications and adequacy concepts
- Recognizing when conservative management or transition planning is appropriate
Renal Pathophysiology (14%)
This is the "why" domain. It rewards understanding of mechanisms over memorized lists, which makes it a good place to anchor your reasoning for the clinical categories.
- Fluid, electrolyte, and acid-base physiology
- Tubular transport and how diuretics and other agents act on it
- Linking a lab pattern back to the underlying mechanism
Acute Kidney Injury/Intensive Care Unit Nephrology (11%)
The acute-care counterpart to CKD. Questions typically test whether you can sort causes, recognize urgent situations, and sequence workup and intervention.
- Distinguishing prerenal, intrinsic, and postrenal processes
- Recognizing indications for urgent intervention
- Drug dosing and nephrotoxin avoidance in critically ill patients
The separate task distribution
The blueprint also classifies the same exam by task. These six areas cross-cut the medical domains; they are not six additional subjects and must not be added to the content weights above.
| Task Area | Weight |
|---|---|
| Managing Patients (Health Maintenance, Clinical Intervention, Pharmaceutical Therapeutics) | 35% |
| Diagnosis | 25% |
| Diagnostic Studies | 20% |
| Applying Scientific Concepts | 10% |
| History and Physical | 7% |
| Legal/Ethical Issues and Emerging Topics | 3% |
The practical takeaway: more than a third of the exam asks "what do you do next?" That means pharmacotherapy, intervention, and monitoring decisions deserve proportionally more of your practice than pure recall of disease descriptions.
Fees, Scoring Timeline, and Award
The initial fee is $350 total: a $100 registration and administration component plus a $250 examination component. The complete picture, including optional practice material, is in our certification cost breakdown. Scheduling windows and deadlines are covered in the exam dates guide.
The award requires two things together: a passing NCCPA specialty exam result and completion of the non-exam requirements (licensure, hours, CME, and attestation). Scores generally arrive eight to ten weeks after administration, following validation. Plan around that gap if you need the credential for a credentialing deadline or job application.
Ten-Year Validity and Maintenance
The CAQ is valid for ten years, provided your PA-C and licensure remain current. Renewal has two parts:
- 125 nephrology Category I CME credits earned during the cycle and submitted by the maintenance-exam application.
- Passing the specialty examination again.
The governing May 2026 policy allows three maintenance attempts in years nine and ten, and passing earlier can reset the cycle. Maintenance can be taken at a test center or online. The online maintenance version keeps 120 questions but allows five minutes per question within an approximately six-week window, with references permitted and assistance from others prohibited. These conditions apply only to maintenance; there is no remote option for the initial exam.
You may see older summaries citing a different CME total for renewal. Rely on the 125-credit figure from the current issuer policies.
A Domain-Driven Preparation Sequence
Because the blueprint is so unevenly weighted, the smartest preparation is to spend time in proportion to weight and to order topics so each one supports the next. This is the only generic-style section in this article, and it is tied directly to the blueprint. For a fuller plan, see the PA-CN study guide, and keep the cheat sheet nearby for quick review.
Renal Pathophysiology first
- Rebuild acid-base, electrolyte, and tubular transport reasoning
- This 14% domain underpins explanations in nearly every other category
Chronic Kidney Disease, then ESRD / Dialysis
- Together these account for 37% of the content blueprint
- Practice medication decisions in reduced kidney function
AKI/ICU Nephrology and Hypertension
- Drill the prerenal/intrinsic/postrenal framework
- Review secondary hypertension and resistant-hypertension reasoning
Smaller domains and timed practice
- Glomerular, systemic, tubulointerstitial/viral, transplant, vascular, and legal/ethical topics
- Run two 60-question blocks in 60 minutes each, without notes
Official practice material
Start with NCCPA's free Sample Nephrology Questions & Critiques document (copyright 2024), which shows the question style and the reasoning behind answers. NCCPA also offers an optional $50 practice exam: one form for this specialty, a 180-day completion window, and educational feedback. NCCPA states that the feedback does not predict whether you will pass, so use it to find weak domains rather than to forecast your result. When you want more volume, our practice tests let you drill by topic and simulate timed blocks.
Where the Credential Fits in Practice
The CAQ's attestation framework hints at the settings where nephrology PAs typically work: ESRD and dialysis units, outpatient CKD clinics, kidney transplantation programs, and acute inpatient dialysis services. Nephrology practices, dialysis organizations, transplant centers, and hospital-based nephrology consult teams are the natural employers.
Whether the credential changes your hiring prospects or compensation depends on the employer and region, and no CAQ-specific salary figure has been verified, so we avoid quoting one. Many hiring managers use it as a signal of commitment and verified experience rather than a requirement. Browse our PA-CN jobs overview for how listings tend to reference the credential, and use the related explainer on PA-CN certification if you are sharing background with a colleague or employer.
Key Takeaway
Treat the CAQ as a documented, portable proof of nephrology focus. Build your case with your hours log, CME record, and a signer who can speak credibly to your patient management, and decide on the credential based on your career goals rather than an assumed raise.
Frequently Asked Questions
No. The PANCE is the initial certification exam that earns the PA-C. The nephrology CAQ is a separate specialty credential you pursue afterward, and it requires a current PA-C, unrestricted licensure, practice hours, CME, an attestation, and a specialty exam.
You need 4,000 total PA practice hours, including at least 2,000 in nephrology, within six years before attesting that the experience requirement has been satisfied. It is not 4,000 hours of nephrology alone.
No. Initial testing is delivered at Pearson VUE test centers and is closed book. An online option exists only for maintenance exams, with its own rules on timing and reference use.
The initial fee is $350 total, made up of $100 for registration and administration and $250 for the examination. The optional NCCPA practice exam is an additional $50.
It is valid for ten years while your PA-C and licensure remain current. Renewal requires 125 nephrology Category I CME credits and a passing specialty exam, with up to three maintenance attempts allowed in years nine and ten under the May 2026 policy.