CNN Certified Nephrology Nurse Study Guide 2026-2027
CNN Certified Nephrology Nurse Study Guide 2026-2027
Complete CNN Exam Prep with Practice Tests, Clinical Scenarios, and Evidence-Based Review
By Capra Academy · Published May 21, 2026 · 390 pages
About This Book
Comprehensive preparation for the CNN exam administered by NNCC. Covers the full spectrum of nephrology nursing — chronic kidney disease management across all stages, hemodialysis and peritoneal dialysis, renal transplantation, acute kidney injury, electrolyte and acid-base disorders, renal pharmacology, and professional practice. Includes practice exams aligned with the official NNCC exam blueprint.
What’s Inside
- Practice Exams with Detailed Rationales
- CKD Management Across All Stages
- Hemodialysis & Peritoneal Dialysis
- Renal Transplantation & Acute Therapies
- Electrolyte & Acid-Base Disorders
- Renal Pharmacology & Nutrition
Frequently Asked Questions
What is the CNN certification?
The CNN (Certified Nephrology Nurse) is administered by the NNCC (Nephrology Nursing Certification Commission). It validates comprehensive nephrology nursing knowledge spanning CKD management, dialysis, transplantation, and acute kidney injury therapies.
How is the CNN different from the CDN?
CNN covers the full spectrum of nephrology nursing (CKD stages 1-5, transplantation, acute therapies, pharmacology) while CDN focuses specifically on dialysis care. CNN requires 3,000 hours of nephrology experience in 3 years versus CDN’s 2,000 hours in 2 years. Read our full CDN vs CNN comparison →.
How many questions are on the CNN exam?
The CNN exam has 200 multiple-choice questions with a 240-minute (4-hour) time limit. The exam fee is approximately $300 for NNCC members and $400 for non-members.
What are the eligibility requirements for the CNN exam?
You must hold a current RN license, have a minimum of 3,000 hours of nephrology nursing practice in the past 3 years, and at least 12 months of experience as a nephrology nurse. No specific degree beyond RN is required.
What topics does the CNN exam cover?
The exam covers CKD management (approximately 25%), dialysis (approximately 35%), transplantation (approximately 15%), acute therapies, and education/professional issues. The content spans the entire CKD continuum from early-stage disease through end-stage renal replacement.
How do I renew my CNN credential?
The CNN credential is valid for 3 years. Renewal requires 45 contact hours of continuing education plus 30 clinical practice hours, or you may choose to retake the exam.
Should I get the CDN or CNN first?
If your practice is primarily in a dialysis unit, start with the CDN. If you work across multiple nephrology settings — CKD clinics, transplant, acute care — or plan to, the CNN is the broader credential. Many nurses obtain the CDN first and then pursue the CNN as their experience broadens.
What study materials should I use for the CNN exam?
Core references include Contemporary Nephrology Nursing (4th ed., 2022), Core Curriculum for Nephrology Nursing (7th ed., 2020), and Nephrology Nursing Scope and Standards of Practice (9th ed., 2022). Our CNN study guide covers every exam domain with practice tests and detailed rationales.
Related Resources
CNN Resource Hub
Planning Your CNN Preparation
Who this exam information is for
This page is for candidates considering or actively preparing for the CNN Certified Nephrology Nurse. Use the linked exam resources to understand the credential, organize preparation, and identify the official requirements that must be confirmed before applying.
What to verify before scheduling
- Current eligibility and application documentation
- Current examination blueprint and domain weights
- Fees, testing windows, identification, and accommodation rules
- Question format, time limit, scoring, and score-report process
- Retake, renewal, and continuing-education policies
A practical study strategy
Begin with the current official content outline. Rank every domain by both blueprint weight and personal confidence, then spend the most time where high weight and low confidence overlap. Use practice questions diagnostically: record the tested domain, why the correct answer is best, why each distractor is weaker, and what source resolves any uncertainty.
Strengths and limitations of this study guide
The Capra Academy guide is designed to combine structured review with practice and answer explanations, making it useful for identifying weak areas and rehearsing exam-style decisions. It is a study aid—not the certifying organization’s candidate handbook, not a guarantee of a passing result, and not a substitute for current official eligibility or policy information. Requirements can change, so follow the official sources linked throughout this resource cluster.