- What ONCC's Published Data Actually Shows
- How the 25-75 Scale and 55-Point Cutoff Work
- Exam Format: Why 165 Questions Isn't the Same as 125 Questions
- Domain Weighting and Where Candidates Lose Points
- Eligibility Requirements That Predict Readiness
- The BMTCN-to-TCTCN Transition and What It Means for 2026
- Building a Preparation Timeline Around the Domains
- Who's Hiring for TCTCN and Why That Context Matters
- Frequently Asked Questions
- ONCC does not publish a public numeric pass rate for TCTCN; candidates must judge readiness from format and content.
- Passing requires a scaled score of 55 on a 25-75 range, not a fixed percentage of raw answers.
- Only 125 of the 165 exam questions are scored; the other 40 are unscored pretest items.
- Four domains - Foundations, Process/Administration, Post-HSCT Management, and Post-Cellular Therapy Management - each carry 22% of the exam.
What ONCC's Published Data Actually Shows
Anyone searching for a "TCTCN pass rate" is usually hoping for a single number that predicts their odds on test day. ONCC, the body that administers the Transplantation and Cellular Therapy Certified Nurse credential through PSI testing centers, does not release a public pass-rate percentage for this exam. That absence of a published figure is itself useful information: it means candidates should stop looking for a magic statistic and start looking at the structural data ONCC does release - scoring scale, question composition, domain weighting, and eligibility requirements - because those factors are the real predictors of whether a given candidate is prepared.
This matters even more heading into 2026, since the credential was renamed from BMTCN to TCTCN effective January 1, 2026, and the content outline was rebuilt from a 2024 role delineation study. Historical pass-rate chatter from the BMTCN era doesn't map cleanly onto the new blueprint. If you want the full breakdown of what changed and why, the TCTCN Certification overview covers the transition in detail.
How the 25-75 Scale and 55-Point Cutoff Work
ONCC reports TCTCN scores on a scaled range of 25 to 75, with 55 required to pass. This is not a raw percentage - it's a scaled score designed to account for slight variations in difficulty between different test forms. Two candidates who answer a different number of questions correctly can both pass, or both fail, depending on which specific items appeared on their form and how those items are weighted statistically.
Practically, this means you should never estimate your performance by counting "roughly how many I think I got right" during the exam. The scaled score is calculated after the fact, factoring in item difficulty across the full pool of scored questions. For a full explanation of exactly how the passing threshold is calculated and what it means for your study targets, see TCTCN Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Aim to build broad, even competence across all six domains rather than trying to "guarantee" a raw percentage - the scaled scoring model rewards consistent mastery, not lucky guessing on a few hard items.
Exam Format: Why 165 Questions Isn't the Same as 125 Questions
The TCTCN exam session runs three hours and contains 165 four-option multiple-choice questions. Of those, 125 are scored and 40 are unscored pretest items used by ONCC to evaluate future exam content. Candidates don't know which items are scored and which are pretest, so every question has to be treated as if it counts.
The session also includes a computer-based testing tutorial and a post-test survey, and there are no scheduled breaks during the three hours. That structure has real implications for pacing and endurance - a candidate who burns too much time deliberating early questions may find themselves rushing through later domain content. This is one of the reasons difficulty perception varies so much between candidates; for a deeper look at what actually makes this exam challenging, read How Hard Is the TCTCN Exam? Complete Difficulty Guide 2026.
| Exam Element | Detail |
|---|---|
| Total questions | 165 (125 scored + 40 unscored pretest) |
| Time allotted | 3 hours, no scheduled breaks |
| Question format | Four-option multiple choice |
| Passing score | 55 on a 25-75 scaled range |
| Testing window | 90 days from eligibility approval |
Domain Weighting and Where Candidates Lose Points
The 2026 TCTCN content outline, based on the 2024 role delineation study, splits content across six domains - but the weighting is far from even. Four domains each account for 22% of the exam, meaning they collectively make up 88% of scored content:
Domain 1: Foundations of HSCT and Cellular Therapy (22%)
Covers the underlying science and rationale for transplant and cellular therapy - disease indications, graft sources, conditioning approaches, and the biological basis for treatment decisions.
- Understand indications across autologous, allogeneic, and cellular therapy modalities
Domain 2: HSCT and Cellular Therapy Process and Administration (22%)
Focuses on the mechanics of delivering treatment - collection, processing, infusion procedures, and the nursing role during active administration.
- Know infusion-related complications and immediate monitoring protocols
Domain 3: Post-HSCT Management and Education (22%)
Covers the recovery phase after transplant - complication recognition, engraftment monitoring, and patient/family education needs.
- Differentiate early versus late post-transplant complications and their management
Domain 4: Post-Cellular Therapy Management and Education (22%)
Parallels Domain 3 but for cellular therapy specifically - cytokine release syndrome, neurotoxicity, and related monitoring and education requirements.
- Master the distinct toxicity profiles unique to cellular therapy versus HSCT
The remaining two domains, Quality of Life (8%) and Professional Performance (4%), are smaller but still scored, and candidates sometimes underestimate them precisely because they carry less weight. A full breakdown of every domain, including subtopics and sample question styles, is available in TCTCN Exam Domains 2026: Complete Guide to All 6 Content Areas.
Eligibility Requirements That Predict Readiness
One reason a raw pass-rate number would be misleading even if ONCC published one: the TCTCN candidate pool is already pre-filtered by strict eligibility requirements. To sit for the exam, a nurse needs:
- A current, active, unencumbered RN license
- At least 2 years of RN experience
- 2,000 hours of HSCT or cellular therapy nursing practice within the previous 4 years
- 10 qualifying contact hours or an academic elective completed within the previous 3 years
That means every person walking into the testing center already has substantial hands-on exposure to the clinical content being tested. The exam isn't designed to catch people with no experience - it's designed to verify depth and consistency of knowledge among practicing HSCT/cellular therapy nurses. For a complete walkthrough of how to confirm you meet each requirement before registering, see TCTCN Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Once approved, candidates receive a 90-day testing window to schedule and sit for the exam through PSI. Missing that window, or scheduling too close to its end, can create unnecessary pressure - plan scheduling logistics as carefully as content review. Details on deadlines and how the window interacts with registration cycles are in TCTCN Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
The BMTCN-to-TCTCN Transition and What It Means for 2026
Effective January 1, 2026, ONCC renamed the credential from BMTCN to TCTCN, reflecting the field's expansion beyond hematopoietic stem cell transplant into broader cellular therapy practice. This isn't a cosmetic change - the content outline itself was rebuilt from a 2024 role delineation study, which is why Domain 4 (Post-Cellular Therapy Management and Education) now exists as its own 22%-weighted domain rather than being folded into transplant-specific content.
Any pass-rate discussion or study material referencing the old BMTCN exam should be treated cautiously, since the domain structure and emphasis have shifted. If you're researching what the credential covers from scratch, What Is TCTCN Certification? and TCTCN Meaning both explain the renamed scope in plain terms.
Key Takeaway
Use only 2026-aligned study resources. Content built around the old BMTCN blueprint may under-emphasize the newly distinct Post-Cellular Therapy Management domain.
Building a Preparation Timeline Around the Domains
Since ONCC doesn't publish pass-rate data to benchmark against, the more useful exercise is mapping preparation time directly to domain weight. A simple approach: allocate roughly equal blocks of study time to Domains 1 through 4 given their matched 22% weighting, then layer in shorter, focused reviews for Quality of Life and Professional Performance nearer to your test date.
Foundations of HSCT and Cellular Therapy
- Review disease indications, graft sources, and conditioning regimens
- Build baseline vocabulary for later domains
Process and Administration + Post-HSCT Management
- Study infusion protocols and immediate complications
- Layer in early and late post-transplant complication patterns
Post-Cellular Therapy Management and Education
- Focus on toxicity profiles distinct from HSCT (e.g., neurotoxicity patterns)
- Practice differentiating overlapping symptoms between transplant and cellular therapy complications
Quality of Life and Professional Performance
- Review survivorship, psychosocial support, and scope-of-practice content
- Don't skip this despite the lower weighting - it's still scored
Full-Length Review and Timed Practice
- Run timed practice sets to simulate the no-break, three-hour format
- Identify weak domains and do targeted review
For a more detailed week-by-week study framework with source recommendations, see the TCTCN Study Guide 2026: How to Pass on Your First Attempt. And when you're down to the final days before your appointment, a condensed reference like the TCTCN Cheat Sheet 2026: One-Page Review of Must-Know Facts can help consolidate the highest-yield facts across all six domains.
Running full-length, timed practice sessions on our TCTCN practice test platform is one of the most direct ways to simulate the actual pacing pressure of a 165-question, no-break session before you sit for the real exam.
Who's Hiring for TCTCN and Why That Context Matters
Understanding who values this credential helps explain why ONCC keeps the eligibility bar and domain structure so tightly tied to real clinical practice. Transplant centers, cellular therapy programs, and specialized oncology units use TCTCN certification as a marker of validated expertise in a narrow, high-acuity specialty. That's a very different hiring context than a general oncology credential, and it shapes both the exam's difficulty and its relevance. If you're evaluating whether pursuing certification fits your career plans, TCTCN Jobs and Is the TCTCN Certification Worth It? Complete ROI Analysis 2026 both look at how employers weigh the credential, while TCTCN Salary Guide 2026: Complete Earnings Analysis covers compensation considerations.
Certification, once earned, is valid for four years, and the $300 (ONS/APHON member) or $420 (nonmember) exam fee is just one part of the overall investment - a full cost breakdown is available in TCTCN Certification Cost 2026: Complete Pricing Breakdown.
Frequently Asked Questions
No. ONCC does not release a public numeric pass-rate percentage for the TCTCN exam. Candidates should instead focus on the published scoring scale, passing score, and domain weighting to gauge readiness.
ONCC reports scores on a scaled range of 25 to 75, and a scaled score of 55 is required to pass. This is not a simple percentage of raw questions answered correctly.
Of the 165 total questions, 125 are scored and 40 are unscored pretest items used for future exam development. You won't know which is which during the exam.
The credential was renamed from BMTCN to TCTCN effective January 1, 2026, with a content outline rebuilt from a 2024 role delineation study, including a distinct Post-Cellular Therapy Management domain. Difficulty comparisons to the old exam aren't directly meaningful because the blueprint has changed.
Candidates receive a 90-day testing window through PSI to schedule and complete the exam once eligibility is confirmed.