- The Short Answer: What a CPDN Actually Is
- Who Issues the Credential
- What a CPDN Does at the Bedside and Beyond
- How the Examination Is Built
- The Four Domains and Their Official Weights
- Who Qualifies to Sit for the Exam
- Registration, Fees and Test-Day Rules
- Where CPDNs Work
- Keeping the Credential Current
- A Domain-Weighted Preparation Plan
- Frequently Asked Questions
- CPDN means Certified Peritoneal Dialysis Nurse, a credential awarded by BONENT to nurses working in peritoneal dialysis.
- The exam has 150 multiple-choice questions, a 3-hour limit, and a scaled passing score of 70.
- Nursing Process carries 60% of the exam and Education 20%, so clinical judgment and patient teaching dominate.
- RNs need one year of nephrology experience; LPN/LVNs need two years, plus active ESRD facility participation.
The Short Answer: What a CPDN Actually Is
A CPDN is a Certified Peritoneal Dialysis Nurse: a licensed nurse who has met published experience requirements and passed a certification examination focused on peritoneal dialysis (PD) nursing practice. It is a professional credential, not a degree and not a job title assigned by an employer. Holding it signals that an independent testing body has verified your knowledge of PD patient care, training, and program operations.
Because the acronym is short and appears in other fields, it helps to be precise. On this site, CPDN refers only to the nephrology nursing certification described here. If you want the credential overview in a different framing, see our companion pages on what CPDN certification is and what CPDN stands for.
Who Issues the Credential
The Certified Peritoneal Dialysis Nurse credential is issued by the Board of Nephrology Examiners Nursing and Technology (BONENT). BONENT is a nephrology-specific certifying organization, which matters in practice: its exam content, eligibility rules, and renewal expectations are all written around dialysis care rather than borrowed from a general nursing test.
Everything in this article reflects BONENT's published materials as checked on October 2, 2026, including the CPDN examination content outline, the eligibility and fee pages, the computer-based testing (CBT) pages, and the 2026 Recertification Booklet. Policies can change, so always confirm current details on BONENT's own pages before applying. For a closer look at the application side, our CPDN requirements guide walks through each prerequisite.
What a CPDN Does at the Bedside and Beyond
Peritoneal dialysis is a home-centered renal replacement therapy, which shapes the nurse's role. Unlike in-center hemodialysis, where staff perform the treatment, PD patients or caregivers perform exchanges themselves. The PD nurse is therefore as much a teacher and surveillance expert as a clinician.
The exam's four domains give a reliable picture of the role. Typical responsibilities include:
- Assessing patients for PD suitability, catheter function, fluid status, adequacy, and signs of complications such as peritonitis or exit-site infection.
- Training patients and caregivers to perform exchanges safely using aseptic technique, then reinforcing and retraining over time.
- Monitoring outcomes through ongoing evaluation of the prescription, laboratory results, and the patient's overall tolerance of therapy.
- Coordinating care with nephrologists, dietitians, social workers, and supply vendors.
- Supporting program operations such as policies, quality processes, and regulatory readiness.
How the Examination Is Built
The CPDN exam is a closed-book, multiple-choice test. Here are the verified mechanics:
| Feature | CPDN Detail |
|---|---|
| Question count | 150 multiple-choice questions |
| Time allowed | 3 hours |
| Passing standard | Scaled score of 70 on a 1-100 scale |
| Delivery options | Paper-and-pencil or center-based computer testing |
| Reference materials | Closed book; no personal books, calculators, or electronic devices |
| CBT interface | Allows question review and answer changes |
One detail trips up many candidates: the passing score is a scaled 70, not a confirmed 70% raw-score cutoff. Scaling adjusts for differences between exam forms, so you should not assume that answering 70% of items correctly equals a pass. Our CPDN passing score article explains how to interpret this, and how hard the CPDN exam is covers what the question style feels like in practice.
Because there are 150 questions in 3 hours, you have roughly 72 seconds per item on average. That pace favors candidates who recognize clinical scenarios quickly, which is exactly what working PD nurses tend to do well and what practice questions help you build.
The Four Domains and Their Official Weights
BONENT publishes the exam content as formal examination objectives with official weights. These are test-blueprint percentages, not a recommendation for how to divide your study hours. Here is the full list:
| Domain | Official Weight |
|---|---|
| Domain 1: Nursing Process | 60% |
| Domain 2: Administration | 10% |
| Domain 3: Education | 20% |
| Domain 4: Professional Development | 10% |
Domain 1: Nursing Process (60%)
The heart of the exam. Expect scenario questions that ask you to assess, identify problems, plan, implement, and evaluate care for PD patients.
- Recognizing and responding to complications such as peritonitis and exit-site or tunnel infections
- Interpreting catheter function problems, drainage issues, and fluid balance changes
- Evaluating dialysis adequacy and adjusting the plan based on patient response
- Applying aseptic technique and infection-prevention principles
Domain 2: Administration (10%)
The program and operations side of PD nursing.
- Policies, procedures, and documentation expectations
- Quality monitoring and regulatory awareness in an ESRD program
- Coordinating resources, supplies, and interdisciplinary communication
Domain 3: Education (20%)
Teaching patients and caregivers to manage therapy safely at home.
- Assessing readiness to learn and adapting instruction to the individual
- Training on exchanges, catheter care, and troubleshooting
- Evaluating learning and reinforcing skills over time
Domain 4: Professional Development (10%)
Your growth and accountability as a nephrology nurse.
- Scope of practice and ethical responsibilities
- Continuing education and staying current with evidence
- Contributing to the specialty through mentoring and quality work
For a deeper breakdown of each area, read our complete CPDN exam domains guide.
Key Takeaway
Nursing Process plus Education together make up 80% of the exam. If your daily work is heavily clinical but you rarely design or evaluate teaching, treat Education as a deliberate skill to practice rather than assuming experience alone will cover it.
Who Qualifies to Sit for the Exam
BONENT offers two standard routes, distinguished by license type and length of nephrology experience:
| Requirement | RN Route | LPN/LVN Route |
|---|---|---|
| License | Valid nursing license | Valid license |
| Nephrology experience | At least 1 year | At least 2 years |
| Facility involvement | Active participation in an ESRD facility | Active participation in an ESRD facility |
Two additional application points are worth knowing. First, you need two signed, dated references: one from your immediate supervisor and another from a nephrology professional. Second, BONENT publishes an exception for qualifying unemployed applicants, who may document their experience through their immediate past supervisor.
If you are still assembling your experience record, our detailed requirements walkthrough can help you plan documentation before you apply.
Registration, Fees and Test-Day Rules
Fees
United States examination fees are $235 for paper testing and $255 for computer-based testing. Fee pages are the authority here and supersede older figures in the 2021-revised Candidate Handbook, so check BONENT's current page before paying. For the full financial picture including renewal costs, see our CPDN certification cost breakdown.
Choosing paper or CBT
BONENT provides both paper-and-pencil testing and center-based CBT, with its official CBT center directory hosted at smttest.com. If you choose CBT, you must test within six months of your confirmation letter, so schedule with that clock in mind. The CBT interface lets you review questions and change answers, which is useful for flagging items you want to revisit. Our CPDN exam dates and scheduling guide covers timing in more depth.
On exam day
Testing is closed book. Bring your confirmation documents and approved identification. Personal books, calculators, and electronic devices are prohibited. Read BONENT's day-of-exam page ahead of time so there are no surprises at check-in.
Where CPDNs Work
PD nursing roles generally sit inside dialysis organizations and nephrology programs. Common settings include:
- Home dialysis programs within dialysis provider organizations, where PD training and follow-up are the daily focus.
- Hospital-based nephrology and dialysis units that support PD initiation and inpatient care.
- Outpatient nephrology clinics that manage chronic kidney disease patients choosing a home modality.
- Program leadership and education roles that oversee training standards, quality, and staffing for PD.
The credential tends to matter most in roles where you train patients and run or support a home program, since employers want evidence of specialty knowledge. For openings and role types, browse our CPDN jobs overview, and for earnings context see the CPDN salary guide. If you are weighing the investment, our ROI analysis lays out the considerations without guessing at numbers.
Keeping the Credential Current
CPDN certification renews every four years. Under the 2026 Recertification Booklet, effective January 1, 2026, routine recertification requires 40 contact hours, including at least 30 nephrology-related Group A hours. There are alternative routes: retaking the examination, or using a once-in-a-lifetime continuing-education waiver.
| Renewal Item | Detail |
|---|---|
| Cycle length | Every 4 years |
| Contact hours | 40 total, with at least 30 Group A nephrology hours |
| Alternatives | Examination retesting, or a once-in-a-lifetime CE waiver |
| Annual maintenance fee | $65 per year |
| Four-year prepaid maintenance | $240 |
| Recertification processing fee | None additional when maintenance requirements are satisfied |
Two nuances are easy to miss. Maintenance fees remain payable even if you use the CE waiver. And the examination route carries its own examination fee, unlike routine recertification through contact hours. Prepaying four years at $240 is lower than paying $65 annually over the same period.
A Domain-Weighted Preparation Plan
The blueprint weights suggest where to concentrate effort, but your own experience should adjust the plan. A nurse who trains patients daily may need less Education review than one who works mostly inpatient. Below is one sample structure tied to the CPDN domains; for a fuller method, see our CPDN study guide and the one-page cheat sheet for last-week review.
Nursing Process foundations
- Review peritonitis, exit-site infection, and catheter complication management
- Work scenario questions on assessment and prioritization
- Practice fluid-balance and adequacy interpretation by hand
Education
- Outline how you would teach exchanges, troubleshooting, and aseptic technique
- Review how to assess learning barriers and evaluate retention
Administration and Professional Development
- Review policy, documentation, quality, and scope-of-practice topics
- Take a timed practice set to rehearse the 150-question, 3-hour pace
Working through timed questions on our CPDN practice test site is a practical way to see which domains need more attention before you register.
Frequently Asked Questions
CPDN stands for Certified Peritoneal Dialysis Nurse. It is a certification awarded by the Board of Nephrology Examiners Nursing and Technology (BONENT) to qualified nurses who pass its peritoneal dialysis nursing examination.
The exam has 150 multiple-choice questions with a 3-hour time limit. It is closed book, and the passing standard is a scaled score of 70 on a 1-100 scale rather than a verified 70% raw score.
Yes. The LPN/LVN route requires a valid license, at least two years of nephrology experience, and active participation in an ESRD facility. The RN route requires one year of nephrology experience instead.
Nursing Process carries the most weight at 60%, followed by Education at 20%. Administration and Professional Development each account for 10%. See our domains guide for details on each area.
Certification renews every four years. Routine renewal requires 40 contact hours, including at least 30 nephrology-related Group A hours, or you can retest or use the once-in-a-lifetime continuing-education waiver. Maintenance fees still apply.