CNN Practice Test : Free Exam Questions & Study Guide
The Certified Nephrology Nurse (CNN) examination is the premier credential for nurses specializing in kidney care. It validates advanced knowledge in hemodialysis, peritoneal dialysis, transplant, and chronic kidney disease management. Earning this certification demonstrates your expertise and commitment to the nephrology nursing field.
This comprehensive guide provides everything you need to prepare, including free practice questions, a score calculator, salary insights, and detailed study resources. Whether you are working in an outpatient clinic or an acute care hospital, passing the CNN exam is a pivotal step in your nursing career.
Note: To sit for the CNN exam, you must have at least 3,000 hours of experience in nephrology nursing within the last three years and hold a current, unrestricted RN license.
Free CNN Practice Exams
Our free CNN practice tests cover all major domains of the exam, including Hemodialysis, Peritoneal Dialysis, Transplant, and Acute Therapies. Use these questions to identify your strengths and weaknesses.
CNN Exam Flashcards
Quick review of essential nephrology concepts
CNN Exam Study Guide
Use this interactive guide to understand the key components of the Certified Nephrology Nurse exam, from registration to scoring.
| What is CNN certification? | The Certified Nephrology Nurse (CNN) credential validates a nurse's comprehensive knowledge in nephrology, including dialysis, transplant, and CKD care. |
| Who accredits the exam? | It is accredited by the Nephrology Nursing Certification Commission (NNCC). |
| Why get certified? | Certification can lead to career advancement, higher pay, and recognition as an expert in nephrology nursing. |
| Is it mandatory? | While not legally required to practice as a nurse, many employers require it for advanced roles or magnet status hospitals. |
| How many questions? | The exam consists of 175 questions, of which 150 are scored and 25 are pretest (unscored). |
| What is the time limit? | Candidates have 3 hours to complete the examination. |
| What is the format? | The questions are multiple-choice, covering various domains of nephrology nursing practice. |
| Is it computer-based? | Yes, the exam is administered via computer at designated testing centers or via live remote proctoring. |
| Experience Requirement | You must have at least 2 years of experience as an RN and 3,000 hours in nephrology nursing within the last 3 years. |
| Education Requirement | A minimum of a Bachelor's degree in Nursing (BSN) or higher is required for the CNN credential (unlike the CDN). |
| CE Requirement | You must complete 30 contact hours of continuing education in nephrology nursing within the last 3 years. |
| How to apply? | Applications are submitted online through the NNCC website with the required documentation and fees. |
| What is a passing score? | The passing score is determined by a criterion-referenced method, but generally equates to answering about 70-75% correctly. |
| When do I get results? | Preliminary results are often available immediately after computer-based testing, with official confirmation following. |
| Can I retake it? | Yes, if you fail, you can retake the exam, typically after a waiting period and paying a re-examination fee. |
| Is there a limit? | There is no specific limit on attempts, but you must meet eligibility each time. |
| Average Salary | Certified Nephrology Nurses typically earn between $75,000 and $100,000+ annually depending on location and role. |
| Does certification help? | Yes, certified nurses often receive a differential or higher base pay compared to non-certified peers. |
| Job Outlook | The demand for nephrology nurses is high due to the increasing prevalence of CKD and ESRD. |
| Advanced Roles | CNNs often move into management, education, or case management roles within dialysis clinics or hospitals. |
CNN Test Format & Content
The CNN exam covers a broad range of topics. Understanding the weight of each domain is crucial for effective study planning.
Covers all aspects of hemodialysis treatment, access, and complications.
- Topics: Cannulation, fluid management, alarms.
- Questions: Approx. 50-60 questions
Focuses on PD modalities, catheter care, and infection prevention.
- Topics: Exchange procedures, complications, adequacy.
- Questions: Approx. 40-45 questions
Care of the kidney transplant recipient and donor.
- Topics: Meds side effects, signs of rejection.
- Questions: Approx. 30 questions
Management of AKI and critical care nephrology modalities.
- Topics: Critical care dialysis, fluid balance.
- Questions: Approx. 15-20 questions
General CKD management and medication administration.
- Topics: Nutrition, binders, EPO, hypertension.
- Questions: Approx. 10-15 questions
Addressing the mental and social needs of renal patients.
- Topics: Patient education, advance directives.
- Questions: Approx. 5-10 questions
Focus heavily on the differences between Hemodialysis and Peritoneal Dialysis complications. Understanding the distinct signs of peritonitis versus vascular access infection is a common testing point.
CNN Score Calculator
Estimate your readiness for the CNN exam based on practice scores.
CNN Salary & Job Outlook
Certified Nephrology Nurses are in high demand and command competitive salaries due to their specialized skillset.
| Role / Level | Annual Salary | Monthly Income | Growth Trend |
|---|---|---|---|
| Dialysis Nurse (Entry) | $65,000 | $5,416 | High Demand |
| Experienced RN | $78,000 | $6,500 | Steady |
| Certified (CNN) | $95,000 | $7,916 | Fast Growth |
| Nurse Manager | $105,000+ | $8,750+ | Leadership |
Earning your CNN certification not only validates your expertise but often qualifies you for "Clinical Coordinator" or "Charge Nurse" roles, which come with significant pay increases.
How to Become a Certified Nephrology Nurse
The path to CNN certification involves a mix of education, clinical experience, and specialized training.
- Earn Nursing Degree - Complete a Bachelor of Science in Nursing (BSN) or higher (Masters/Doctorate).
- Obtain RN License - Pass the NCLEX-RN and hold a current, unrestricted Registered Nurse license.
- Gain Experience - Accumulate at least 2 years (3,000 hours) of nephrology nursing experience within the last 3 years.
- Complete CE Credits - Finish 30 contact hours of continuing education specifically in nephrology nursing.
- Apply for Exam - Submit your application to the NNCC with proof of eligibility and payment.
- Schedule Test - Once approved, schedule your exam at a testing center or via online proctoring.
- Pass Exam - Score 70% or higher on the 175-question exam to earn your CNN credential.
CNN Certification Costs
Budgeting for your certification is important. Here is a breakdown of the typical costs associated with becoming a CNN.
Many dialysis organizations (like DaVita or Fresenius) and hospitals offer reimbursement for certification exams. Check with your HR department before paying out of pocket.
CNN Career Opportunities
Explore the diverse roles available to Certified Nephrology Nurses.
Testing Contacts & Resources
For official questions regarding eligibility, scheduling, or membership, contact these organizations.
CNNs are highly sought after by major dialysis providers like DaVita, Fresenius, and US Renal Care, as well as academic medical centers for their transplant programs.
CNN Test Day Checklist
Ready to Become a CNN?
Join thousands of successful nephrology nurses who advanced their careers with our free practice resources.
Start Practicing NowCNN Certification Renewal
To maintain your CNN credential, you must recertify every 5 years. It is crucial to track your continuing education and practice hours.
Keep track of your CE certificates as you earn them. The NNCC audits a percentage of renewals, so having your documentation ready prevents stress later.
CNN Exam FAQ
What is the CNN exam?
The Certified Nephrology Nurse (CNN) exam is a comprehensive certification for nurses with experience in nephrology, validating their expertise in kidney care.
How many questions are on the CNN exam?
The exam contains 175 multiple-choice questions. 150 are scored, and 25 are pilot questions that do not count toward your score.
What score do I need to pass?
While the exact raw score can vary slightly by exam version, you generally need to answer about 70-75% of the questions correctly to pass.
How much does the CNN exam cost?
The standard fee is approximately $425. However, members of the American Nephrology Nurses Association (ANNA) receive a discounted rate of around $350.
How long do I have to study?
Most candidates spend 3-6 months preparing for the exam, utilizing study guides, practice tests, and reviewing clinical guidelines.
Can I take the exam online?
Yes, the NNCC offers both in-person testing at C-NET centers and Live Remote Proctoring (LRP) for taking the exam from home.
What happens if I fail?
If you do not pass, you can retake the exam. You must wait a specific period (usually 90 days) and pay a re-examination fee.
Is the CDN different from CNN?
Yes. The CDN (Certified Dialysis Nurse) focuses specifically on dialysis, while the CNN covers the broader spectrum of nephrology nursing and requires a BSN.
Does my experience need to be recent?
Yes, you need 3,000 hours of nephrology nursing experience within the last 3 years to be eligible for the exam.
Do I need a BSN?
Yes, the CNN certification specifically requires a Bachelor of Science in Nursing (BSN) or a higher nursing degree.