- How the CPDN Blueprint Is Built
- The Four Domains at a Glance
- Domain 1: Nursing Process (60%)
- Domain 2: Administration (10%)
- Domain 3: Education (20%)
- Domain 4: Professional Development (10%)
- Format, Fees, and Exam-Day Rules
- What Scaled Scoring Means for Domain Strategy
- Sequencing Your Prep Around the Weights
- Frequently Asked Questions
- The Certified Peritoneal Dialysis Nurse exam from BONENT has four domains: Nursing Process 60%, Education 20%, Administration 10%, Professional Development 10%.
- The exam has 150 multiple-choice questions and a 3-hour limit; a scaled score of 70 on a 1-100 scale passes.
- Exam fees are $235 for paper testing and $255 for computer-based testing in the United States.
- Nursing Process and Education together make up 80% of the blueprint, so they should anchor your study time.
How the CPDN Blueprint Is Built
The Certified Peritoneal Dialysis Nurse (CPDN) credential is issued by the Board of Nephrology Examiners Nursing and Technology (BONENT). Its examination content is defined in a document called Certified Peritoneal Dialysis Nurse - Detail of Examination Content, the currently linked, undated CPDN examination outline on BONENT's site. That outline organizes everything a candidate can be tested on into four domains, each with an official weight.
It helps to read those weights correctly. They are formal examination objectives, meaning they describe how the 150 scored questions are distributed across content areas. They are not a prescription for how many hours you should spend on each topic. A domain that is only 10% of the exam can still contain material you personally find difficult, and a 60% domain can contain material you already perform daily at the bedside. Use the weights as a map of where points live, then adjust for your own gaps.
If you are still confirming that this is the right credential, see What Is CPDN Certification? for a plain-language overview. This guide assumes you already know you are pursuing the peritoneal dialysis nursing exam and want a close look at what each content area demands.
The Four Domains at a Glance
| Domain | Official Weight | Character of the Content |
|---|---|---|
| 1. Nursing Process | 60% | Clinical assessment, planning, implementation, and evaluation of care for peritoneal dialysis patients |
| 2. Administration | 10% | Program, documentation, and facility-level responsibilities |
| 3. Education | 20% | Teaching patients, families, and caregivers about home peritoneal dialysis |
| 4. Professional Development | 10% | Role growth, standards, and continuing competence as a nephrology nurse |
The arithmetic is worth stating plainly. Nursing Process plus Education equals 80% of the exam. Administration plus Professional Development equals the remaining 20%. A candidate who is strong clinically and strong as a teacher is already positioned well, but the smaller domains are not safe to skip, because a scaled passing score requires broad competence rather than excellence in a single area.
Domain 1: Nursing Process (60%)
This is the center of gravity of the entire exam. Six of every ten questions fall here, which on a 150-question test is roughly the bulk of what you will see. The name tells you the framing: expect questions organized around the nursing process, where you assess a situation, identify what matters, choose an intervention, and judge whether it worked.
What Nursing Process Questions Look Like
Peritoneal dialysis nursing is a home-therapy specialty, so many scenarios describe a patient performing exchanges or running a cycler, then ask what the nurse should recognize, prioritize, or do next.
- Interpreting what a patient reports about their exchanges, effluent, or symptoms
- Recognizing signs that the peritoneal membrane, catheter, or exit site is not performing as expected
- Choosing among prescription or treatment adjustments within the nurse's scope of practice
- Prioritizing when several problems are presented together
- Evaluating whether an intervention achieved its intended outcome
Topics to Master Inside This Domain
Because the domain is broad, it is easiest to organize your review around the care you actually deliver across a patient's PD journey:
- Assessment: fluid status, blood pressure trends, nutrition, labs, adequacy markers, and how a patient's home routine affects all of them.
- Catheter and exit-site care: what a healthy exit site looks like, what an infected one looks like, and how care differs between the healing period and long-term use.
- Peritonitis: recognition, the information a nurse gathers, the role of effluent assessment, and the expectation that prompt response protects the patient and the therapy.
- Exchange and cycler therapy: manual and automated modalities, how dwell, volume, and solution choices relate to ultrafiltration and clearance, and troubleshooting common problems like poor drainage.
- Complications and comorbidities: issues related to the abdominal cavity, metabolic and electrolyte concerns, and the way diabetes, heart disease, and other conditions interact with PD.
- Medications and nutrition: the dietary and medication considerations specific to patients dialyzing through the peritoneum.
For a deeper discussion of how difficult candidates find the clinical material, read How Hard Is the CPDN Exam? Complete Difficulty Guide 2026.
Domain 2: Administration (10%)
Administration carries 10% of the exam, so roughly one question in ten touches it. It is the domain most likely to surprise bedside-focused nurses, because it covers the responsibilities that surround clinical care rather than the care itself.
Administration Themes
Think of this domain as the structure that makes a safe home dialysis program possible.
- Documentation and record-keeping that supports continuity of care
- Policies, procedures, and quality expectations within a dialysis program
- Regulatory and facility-level responsibilities connected to ESRD care
- Coordination across the interdisciplinary team, including physicians, dietitians, and social workers
- Supplies, equipment, and logistics that keep a home therapy running
Questions here tend to reward professional judgment about how a PD program should operate. If you have worked in a unit with strong quality-improvement processes, you already have context. If your experience is mostly direct patient care, set aside focused review time for this domain so that a small share of the exam does not become a disproportionate source of lost points.
Domain 3: Education (20%)
Education is the second-largest domain at 20%, and it reflects something fundamental about peritoneal dialysis: the patient or a caregiver performs the therapy at home. A PD nurse is therefore, in a very real sense, a teacher first and a clinician second. The exam reflects that reality.
What Candidates Must Understand
Education questions test whether you can teach effectively and recognize when teaching has or has not worked.
- Training patients and caregivers to perform exchanges, operate equipment, and maintain aseptic technique
- Adapting instruction to literacy, vision, dexterity, language, and learning style
- Teaching patients to recognize and report early warning signs, including signs of infection
- Reinforcing diet, fluid, and medication adherence
- Assessing learning, retraining when needed, and documenting competence
- Supporting patients who are choosing among dialysis modalities
The strongest approach to this domain is to think like an instructor. When a scenario describes a patient making a mistake, ask what the mistake reveals about the teaching, what barrier might be present, and what the nurse should do to close the gap. These questions often have a clinical component and an educational component at once, which is why strength in Domains 1 and 3 reinforces each other.
Key Takeaway
Pair your Education review with your Nursing Process review. A question about contamination during an exchange is both a clinical problem and a teaching problem, and understanding both angles is what earns the point.
Domain 4: Professional Development (10%)
Professional Development also carries 10%. It addresses the nurse's growth, accountability, and commitment to maintaining competence over a career, and it fits naturally with the way BONENT structures certification itself: credentials are renewed every four years, and maintaining them requires ongoing learning.
Professional Development Themes
This domain is about who you are as a practicing nephrology nurse.
- Professional standards, scope of practice, and ethical responsibilities
- Continuing education and the value of staying current with PD practice
- The role of certification in demonstrating competence
- Evidence-based practice and participation in quality efforts
- Mentoring colleagues and contributing to the specialty
These questions are often more reasoning-based than fact-based, and they usually have a clearly professional "best" answer. They also connect to practical certification realities. Recertification under the 2026 Recertification Booklet requires 40 contact hours, including at least 30 nephrology-related Group A hours, with alternatives of retaking the examination or using a once-in-a-lifetime continuing-education waiver. For cost context, see CPDN Certification Cost 2026: Complete Pricing Breakdown.
Format, Fees, and Exam-Day Rules
Knowing the domains is only half of the picture. The logistics determine how you experience them.
| Item | Detail |
|---|---|
| Question count | 150 multiple-choice questions |
| Time allowed | 3 hours |
| Passing standard | Scaled score of 70 on a 1-100 scale |
| U.S. exam fee, paper | $235 |
| U.S. exam fee, CBT | $255 |
| Delivery | Paper-and-pencil or center-based computer testing |
| CBT scheduling window | Test within six months of your confirmation letter |
Three hours for 150 questions works out to a little over one minute per question, which is comfortable for most candidates but not generous enough to dwell on every item. Computer-based testing allows you to review questions and change answers, which makes it practical to flag harder Nursing Process scenarios and return to them after you have banked the easier points.
Eligibility and Application Mechanics
- RN route: a valid nursing license, at least one year of nephrology experience, and active participation in an ESRD facility.
- LPN/LVN route: a valid license, at least two years of nephrology experience, and active ESRD participation.
- References: two signed, dated references are required, one from your immediate supervisor and another from a nephrology professional.
- Unemployed applicants: a published exception allows qualifying candidates to document experience through their immediate past supervisor.
Full detail on who qualifies is in CPDN Requirements 2026: Eligibility, Prerequisites & How to Qualify, and scheduling specifics are covered in CPDN Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
What Scaled Scoring Means for Domain Strategy
The passing standard is a scaled score of 70 on a 1-100 scale. This is important to understand correctly: it is a scaled score, not a verified requirement that you answer 70% of questions correctly. Scaling exists so that results remain comparable across different versions of the exam. In practice, you cannot translate your raw practice-test percentage directly into a predicted pass or fail, so treat any practice score as a rough indicator of readiness rather than a guarantee.
For strategy, the key point is that the exam does not score domains separately for pass or fail purposes in the way a candidate might fear. What matters is overall performance. That said, because Nursing Process and Education account for 80% of the questions, weakness there is very hard to offset with strength in the smaller domains. Meanwhile, ignoring Administration and Professional Development entirely forfeits up to 20% of the exam for no good reason, since those domains are often among the more learnable areas with focused review. For a fuller explanation of the score itself, see CPDN Passing Score 2026: Exactly What You Need to Pass, and for what published data can and cannot tell you, CPDN Pass Rate 2026: What the Data Shows.
Sequencing Your Prep Around the Weights
You do not need an elaborate method here. What matters is putting the right domain in the right week. A reasonable order treats Nursing Process as the long foundation, layers in Education alongside it, and saves the two smaller domains for focused, compact reviews.
Nursing Process, first pass
- Work through assessment, catheter and exit-site care, and peritonitis
- Cover exchange and cycler therapy and common troubleshooting
- Note every scenario type you miss for later review
Education, interleaved with clinical review
- Study teaching strategies for patients and caregivers
- Revisit clinical topics through a "how would I teach this?" lens
Administration and Professional Development
- Review documentation, program responsibilities, and quality concepts
- Cover standards, scope of practice, and continuing competence
Timed mixed practice
- Take full-length, timed practice sets at CPDN Exam Prep
- Re-study the domains where your misses cluster
Adjust the length to your experience. A nurse who has run a home PD program for years may compress the early weeks, while someone newer to the specialty may stretch them. For a complete preparation plan, see the CPDN Study Guide 2026: How to Pass on Your First Attempt, and for a condensed recall aid in the final days, the CPDN Cheat Sheet 2026: One-Page Review of Must-Know Facts.
Key Takeaway
Let the weights decide the order of study, not the amount of comfort you feel. Start with the 60% domain, tie the 20% domain to it, and finish with the two 10% domains so they stay fresh for exam day.
Frequently Asked Questions
The Certified Peritoneal Dialysis Nurse exam from BONENT has four domains: Nursing Process (60%), Administration (10%), Education (20%), and Professional Development (10%). Together they cover all 150 multiple-choice questions.
Nursing Process is by far the largest at 60%. Education follows at 20%. Together these two domains account for 80% of the exam, which is why they deserve the majority of your preparation effort.
No. The percentages are formal examination objectives that show how questions are distributed across content areas. They are not a curriculum or hour allocation, so adjust your study time to your own strengths and gaps.
Not necessarily. Passing requires a scaled score of 70 on a 1-100 scale, which is different from a verified 70% raw-score threshold. Scaled scoring keeps results comparable across exam versions.
It is risky. Administration and Professional Development together make up 20% of the exam, and they are often learnable with focused review. Skipping them gives away points that could protect you if the clinical scenarios prove challenging.
Understanding the four domains is the first step toward a focused plan. If you want to see how the credential fits into a career path, explore Is the CPDN Certification Worth It? Complete ROI Analysis 2026 and CPDN Jobs, then put your knowledge to the test with timed questions at cpdnexam.com.