CDN Vocabulary Game
Exam terms with clues and explanations by OpenExamPrep.
About the CDN Vocabulary Game
A free word game for the CDN exam. Each round shows a clue for one of 20 exam terms across 4 topics. Recall the term, spell it out, then read a short explanation. Rounds pick a random term, so you can keep playing as long as you like.
How to Play
- 1Read the clue and type a term with the right number of letters (3 to 6). Abbreviations count: type the letters only.
- 2Press Check Answer or Enter. Each letter changes color to show how close you are.
- 3You have 6 tries. Stuck? Need a hint? asks the AI tutor for a nudge without giving the term away, and Skip moves to a new term.
- 4After the round, read the explanation, ask the AI to explain it, share your result, or press Next.
- ARight letter, right spot
- AIn the term, wrong spot
- ANot in the term
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Topics in the CDN Vocabulary Game
Chronic HD unit
Nephrology concepts
AKI and transplant care
Water treatment
Sources for these terms (8)
- Hemodialysis · Source checked 2026-11-04
- Eating & Nutrition for Hemodialysis · Source checked 2026-11-04
- 42 CFR 494.50 - Condition: Reuse of hemodialyzers and bloodlines · Source checked 2026-11-04
- 42 CFR 494.40 - Condition: Water and dialysate quality · Source checked 2026-11-04
- KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease · Source checked 2026-11-04
- Anemia in Chronic Kidney Disease · Source checked 2026-11-04
- Edema · Source checked 2026-11-04
- CDN Certification Preparation Guide (for test takers starting 9/1/2026) · Source checked 2026-11-04
About the CDN Exam
The CDN (Certified Dialysis Nurse) exam validates expertise in hemodialysis nursing care. Its blueprint effective September 1, 2026 covers the chronic hemodialysis unit (ESRD), concepts of kidney disease in adults, hemodialysis for patients with AKI or post-transplant delayed graft function, and water for dialysis. It tests hemodialysis principles and procedures, vascular access care, complications, medications, infection control, patient education, and collaboration in dialysis settings.
Exam sponsor: NNCC (Nephrology Nursing Certification Commission). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.
Questions
150 questions
Time Limit
3 hours
Passing Score
Standard score 95 (70% correct)
Reported exam pass rate: 65%. 2025 CDN pass rate (NNCC 2025-2026 Annual Report) This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website
Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.
Frequently Asked Questions
Is the CDN vocabulary game free?
Yes. The game is free to play with no sign-up. Signing in adds AI explanations for any term.
How does the CDN vocabulary game work?
Each round shows a clue for one of 20 CDN terms. Guess the term in six tries: green means the right letter in the right spot, yellow means the letter is in the term but in another spot, and gray means it is not in the term. After the round, read the explanation and play the next term.
Where do the CDN terms come from?
OpenExamPrep researched each term from the NNCC (Nephrology Nursing Certification Commission) content outline and primary sources, listed under Sources on this page. The game is independent study material, not an official exam resource.
What is the CDN certification?
CDN (Certified Dialysis Nurse) is a certification from the NNCC for registered nurses who care for patients receiving in-center hemodialysis. It validates expertise in hemodialysis care for patients with ESRD, AKI or post-transplant delayed graft function, kidney disease concepts, and water treatment for dialysis.
How many questions are on the CDN exam?
The CDN exam has 150 multiple-choice questions with a 3-hour time limit; about 25 are unscored pilot questions. You pass with a standard score of 95, which NNCC says is achieved by answering 70% of questions correctly. Chronic HD Unit (ESRD) is the largest content area at 52% of the exam.