BMTCN Passing Score 2026: Exactly What You Need to Pass

What the Passing Score Actually Means

When candidates ask "what's the passing score," they usually picture a percentage - get 70% or 80% of questions right and you pass. That is not how this exam works. The Oncology Nursing Certification Corporation (ONCC) sets a scaled score of 55 as the passing standard, measured on a 25-75 scale rather than a raw percentage-correct scale.

A scaled score converts your raw number of correct answers into a standardized number that accounts for the difficulty of the specific question set you received. Because pretest questions are mixed in with scored questions (more on that below), and because different candidates may see slightly different item combinations, ONCC uses this conversion so that a 55 always represents the same level of mastery, regardless of which version of the exam you sat.

The TCTCN Name Change and What It Means for "BMTCN" in 2026

If you've been researching this credential and keep seeing two different acronyms, here's the clarification: ONCC renamed the Blood and Marrow Transplant Certified Nurse credential to the Transplantation and Cellular Therapy Certified Nurse (TCTCN), effective January 1, 2026. The exam is delivered through PSI testing centers under this updated title. For candidates studying under the "BMTCN" label heading into 2026, the underlying content, blueprint, and passing standard described in this article are the ones you'll be tested on - the name on your certificate is simply updating to reflect the broader scope of cellular therapy nursing that the role delineation study captured.

This matters for passing-score planning because the current blueprint - the one that determines exactly which topics feed into your scaled score of 55 - is based on the 2024 role delineation study. That study is what produced the domain structure and weighting you'll study against, described in detail in our complete guide to all six exam content areas.

Exam Format: 165 Questions, 125 That Count

Understanding the exam's structure is essential to interpreting what "passing" actually requires. The exam consists of 165 multiple-choice questions delivered in a single 3-hour session. Of those, only 125 are scored items that count toward your scaled score. The remaining 40 are pretest questions - unscored items ONCC uses to evaluate future exam content.

The catch: you won't know which questions are scored and which are pretest. This means every single question deserves full attention as though it counts, because functionally, any of them might. There is no way to skip or rush through sections you assume are "just pretest" filler.

How the Passing Standard of 55 Is Determined

A scaled score of 55 is a criterion-referenced standard, meaning it reflects a fixed level of competency defined by subject-matter experts - not a moving target based on how other candidates performed on a given test date. This is different from a norm-referenced curve where the passing line shifts depending on the overall group's performance.

In practical terms, this means:

• Your score is not influenced by how easy or hard other candidates found the same exam form.
• The passing threshold stays consistent across testing windows throughout the year.
• Guessing strategies aimed at "beating the curve" don't apply - solid content knowledge is the only reliable path to a 55.

Because the standard is fixed rather than relative, your best preparation strategy is content mastery across every domain rather than trying to predict exam difficulty. For a broader look at how challenging the material tends to be for working transplant nurses, see our full difficulty breakdown, and for context on how candidates perform overall, review the current pass rate data.

Domain Weighting and Why It Drives Your Score

Because your scaled score is built from 125 scored questions distributed across six content domains, understanding the weighting is the single most useful thing you can do before building a study plan. Four domains are tied for the largest share of the exam at 22% each - meaning together they make up the vast majority of your scored questions.

The remaining two domains carry smaller but still testable weight: Quality of Life (8%) addresses survivorship, psychosocial support, and long-term follow-up, while Professional Performance (4%) covers scope of practice, ethics, and collaborative care responsibilities. Even at lower weights, these domains contain scored questions you cannot afford to ignore entirely. For a full walkthrough of every domain with subtopic detail, see the exam domains guide.

*Estimated distribution based on percentage weighting applied to the 125 scored questions; ONCC does not publish an exact per-domain question count.

Fees, Registration, and the DoubleTake Retake

Passing on your first attempt matters financially, not just professionally. Registration costs $300 for ONS/APHON members and $420 for nonmembers. ONCC also offers an optional DoubleTake add-on for $100, which functions as a retake safety net purchased alongside your initial registration.

Before you register, confirm your testing window and scheduling deadlines through PSI, since availability windows can fill. Our exam dates and testing window guide walks through scheduling logistics in detail, and the full pricing breakdown covers every fee scenario, including what happens if you need to reschedule.

Eligibility Snapshot Before You Register

You cannot sit for the exam - and therefore cannot chase that scaled score of 55 - without meeting ONCC's eligibility criteria first. In brief, you need:

• A current, active, unencumbered RN license valid in the United States, its territories, or Canada
• At least two years of RN experience within the previous four years
• 2,000 hours of HSCT or cellular-therapy nursing practice within the previous four years
• 10 relevant contact hours completed within the previous three years

These thresholds exist because the exam assumes hands-on clinical exposure to the material tested in Domains 1 through 4. If you're unsure whether your current role qualifies, our detailed requirements and eligibility guide breaks down each criterion with examples of qualifying experience.

Mapping Study Time to the Passing Standard

Because four domains carry equal 22% weight, your study calendar should treat them as four roughly equal blocks rather than assuming one is more "core" than another. A sensible approach dedicates focused weeks to each heavy domain, layers in the two lighter domains alongside review, and reserves final days for full-length practice under timed conditions.

Whatever schedule you build, timed practice matters as much as content review, since the scaled score reflects accuracy under real exam conditions, not open-book familiarity. Our first-attempt study guide expands on sequencing and resource selection, and you can run realistic timed sets on our practice test platform to get comfortable with the pacing before test day. For a condensed review pass in the final week, the one-page cheat sheet is built specifically for quick recall of must-know facts across all six domains.

Frequently Asked Questions