- Exam Snapshot: The Numbers That Matter
- Domain Breakdown at a Glance
- Registration, Fees, and Eligibility Rules
- Question Format and Test-Day Mechanics
- Must-Know Clinical Topics by Domain
- Scoring and What Counts as Passing
- Recertification Basics to Remember
- Final Week Review Plan
- Who Hires CPHON-Certified Nurses
- FAQ
- CPHON has 165 questions (125 scored, 40 unscored) in a 3-hour PSI session with no scheduled breaks.
- Symptom Management and Supportive Care is the largest domain at 26% of the exam.
- Passing requires a scaled score of 55 on a 25-75 scale, not a raw percentage.
- Fees are $300 for ONS/APHON members and $420 for nonmembers, paid through ONCC.
Exam Snapshot: The Numbers That Matter
If you only have five minutes before your testing appointment, these are the numbers to lock into memory. The Oncology Nursing Certification Corporation (ONCC) administers the Certified Pediatric Hematology Oncology Nurse (CPHON) exam through PSI test centers nationwide. The exam itself is a 165-item, four-option, one-best-answer multiple-choice test - 125 questions count toward your score, and 40 are unscored pretest items you cannot distinguish from the scored ones. You get a 3-hour session that includes a 15-minute tutorial and a post-test survey, but there are no scheduled breaks built into that window.
For a deeper walkthrough of what the test day actually feels like, the CPHON Study Guide 2026: How to Pass on Your First Attempt covers pacing strategy in detail. This cheat sheet is meant to sit beside that guide as your quick-reference companion.
Domain Breakdown at a Glance
CPHON content is organized into six domains, each weighted differently on the exam. Knowing these percentages tells you exactly where to spend your limited study hours.
| Domain | Weight |
|---|---|
| 1. Care Continuum | 6% |
| 2. Pediatric Hematology and Oncology Nursing Practice | 18% |
| 3. Treatment Modalities and Side Effects | 21% |
| 4. Symptom Management and Supportive Care | 26% |
| 5. Pediatric Hematologic and Oncologic Emergencies | 21% |
| 6. Psychosocial Dimensions of Care | 8% |
Notice that Domains 3, 4, and 5 combine for 68% of the exam. That trio - treatment modalities, symptom management, and emergencies - should absorb the bulk of your review time. For a full topic-by-topic breakdown of each content area, see the CPHON Exam Domains 2026: Complete Guide to All 6 Content Areas.
Domain 4: Symptom Management and Supportive Care (26%)
This is the single largest domain, so gaps here disproportionately hurt your score.
- Antiemetic protocols and mucositis grading
- Nutrition support and growth monitoring in pediatric oncology patients
- Pain assessment tools appropriate across developmental stages
Registration, Fees, and Eligibility Rules
CPHON registration runs through ONCC, and the fee structure rewards professional membership: $300 for members of the Oncology Nursing Society or the Association of Pediatric Hematology/Oncology Nurses, versus $420 for nonmembers. If you're not yet a member of either organization, run the math before you register - membership dues may cost less than the $120 difference.
Eligibility is not automatic. You need:
- An active, unencumbered RN license (U.S., a U.S. territory, or Canada)
- 2 years of RN experience within the preceding 4 years
- 2,000 hours of pediatric hematology/oncology nursing practice within the preceding 4 years
- 10 contact hours of oncology or hematology nursing continuing education (or an academic elective) within the preceding 3 years, with no more than 5 of those hours coming from CME or CPE
For the full explanation of how these criteria are verified and documented, review CPHON Requirements 2026: Eligibility, Prerequisites & How to Qualify. And if you're weighing whether the fee and hour requirements are worth the investment, the CPHON Certification Cost 2026: Complete Pricing Breakdown lays out the full financial picture, while Is the CPHON Certification Worth It? Complete ROI Analysis 2026 tackles the bigger-picture question.
Key Takeaway
Once eligible, candidates receive a 90-day PSI testing window to schedule and sit for the exam - plan your study timeline around that window, not an open-ended date.
Question Format and Test-Day Mechanics
Every question on CPHON follows the same structure: four answer options, one best answer. There's no partial credit and no "select all that apply" format to worry about - the challenge is that many distractor options are clinically plausible, requiring you to identify the single best nursing action rather than merely a correct one.
Because there are no scheduled breaks during the 3-hour session, treat your pacing like a marathon, not a sprint. With 165 total items (125 scored, 40 unscored) and roughly 3 hours available including the tutorial, budget just over a minute per question on average, leaving room for a first pass and a flagged-question review pass at the end.
Must-Know Clinical Topics by Domain
Beyond the percentages, here's what candidates consistently need to master within each domain.
Domain 1: Care Continuum (6%)
Smallest domain but not skippable - expect questions on care coordination across diagnosis, treatment, survivorship, and end-of-life phases.
- Transitions between inpatient, outpatient, and home care settings
- Coordination with school reintegration and long-term follow-up clinics
Domain 2: Pediatric Hematology and Oncology Nursing Practice (18%)
Covers foundational disease knowledge and nursing assessment.
- Common pediatric malignancies and hematologic disorders (leukemias, sickle cell disease, hemophilia)
- Diagnostic procedures including bone marrow aspiration and lumbar puncture
Domain 3: Treatment Modalities and Side Effects (21%)
Chemotherapy classes, radiation, stem cell transplant, and immunotherapy all live here.
- Vesicant vs. irritant chemotherapy agents and extravasation management
- Graft-versus-host disease recognition post-transplant
Domain 5: Pediatric Hematologic and Oncologic Emergencies (21%)
Tied with Domain 3 for second-largest weight - high-acuity content that tests rapid clinical judgment.
- Tumor lysis syndrome, sepsis, and superior vena cava syndrome recognition
- Febrile neutropenia protocols and time-to-antibiotic standards
Domain 6: Psychosocial Dimensions of Care (8%)
Family-centered and developmental considerations across the treatment trajectory.
- Age-appropriate communication with pediatric patients
- Sibling support and family coping resources
To understand how difficult candidates typically find these clinical domains relative to one another, see How Hard Is the CPHON Exam? Complete Difficulty Guide 2026.
Scoring and What Counts as Passing
CPHON uses scaled scoring, not raw percentage correct. Scores are reported on a 25-75 scale, and you need a scaled score of 55 to pass. This scaling accounts for slight difficulty variation between test forms, so don't try to estimate your pass/fail status by counting how many questions "felt hard."
In 2025, the initial-candidate pass rate was 69%, with an overall pass rate (including repeat test-takers) of 68%. These figures give useful context but shouldn't be treated as a personal probability - your preparation, not the aggregate statistic, determines your outcome. For a full data breakdown, see CPHON Pass Rate 2026: What the Data Shows, and for the mechanics of scaled scoring itself, read CPHON Passing Score 2026: Exactly What You Need to Pass.
Recertification Basics to Remember
CPHON certification is valid for 4 years. Renewal requires maintaining active RN status plus meeting two of three components:
- Qualifying practice - 1,000 pediatric hematology/oncology nursing hours within the prior 30 months
- Professional-development or learning-plan points
- Retesting
Mark your renewal deadline the same day you receive your initial certification - waiting until the final year to plan your practice hours or CE points is the most common recertification mistake.
Final Week Review Plan
If you're in the final stretch before your PSI appointment, don't start new material - consolidate. This short timeline assumes you've already done the bulk of your content review using a structured plan like the one in the CPHON Study Guide 2026: How to Pass on Your First Attempt.
High-Weight Domain Drills
- Run timed practice sets focused on Domain 4 (Symptom Management) and Domain 5 (Emergencies)
- Review generic drug names for every chemotherapy agent you can name by brand
Treatment Modalities and Weak Spots
- Revisit Domain 3 content on transplant complications and vesicant management
- Retake any practice questions missed earlier in your prep
Light Review Only
- Skim your one-page notes on Care Continuum and Psychosocial Dimensions
- Confirm PSI test center location, ID requirements, and appointment time
Who Hires CPHON-Certified Nurses
CPHON credentialing signals specialized competency to employers running pediatric inpatient oncology units, hematology clinics, bone marrow transplant programs, and pediatric hospice/palliative teams. Children's hospitals and academic medical centers with dedicated pediatric hematology/oncology divisions frequently list CPHON as preferred or required for senior bedside and charge-nurse roles. For a broader look at where the credential opens doors and what compensation trends look like, see CPHON Jobs and CPHON Salary Guide 2026: Complete Earnings Analysis.
If you're still exploring foundational questions about the credential itself - what it stands for, who it's for, and how it differs from adult oncology certifications - the What Is CPHON? and CPHON Certification overviews are good starting points, alongside CPHON Meaning and What Does CPHON Stand For? for quick definitional context.
Key Takeaway
Employers value CPHON because the eligibility hours (2,000 hours of direct pediatric hem/onc practice) already filter for real bedside experience - the exam confirms depth on top of that experience.
Before you schedule, double check current testing windows and any blackout periods using CPHON Exam Dates 2026: Testing Windows, Deadlines & Scheduling, and bookmark our CPHON practice test platform to start running timed domain-specific question sets right away. Consistent practice with realistic four-option, one-best-answer items - the exact format used on the real exam - is the fastest way to convert this cheat sheet into exam-day recall.
FAQ
The exam has 165 total questions: 125 are scored and 40 are unscored pretest items used for future exam development.
You need a scaled score of 55 on a 25-75 scale, not a specific raw number or percentage of correct answers.
Symptom Management and Supportive Care carries the highest weight at 26%, followed by Treatment Modalities and Side Effects and Pediatric Hematologic and Oncologic Emergencies, each at 21%.
It costs $300 for members of the Oncology Nursing Society or the Association of Pediatric Hematology/Oncology Nurses, and $420 for nonmembers.
Certification lasts 4 years. Renewal requires active RN status plus meeting two of three components: qualifying practice hours, professional-development points, or retesting.