CTP Exam Domains 2026: Complete Guide to All 5 Content Areas

How the ABTC Content Outline Is Built

The Certified Transplant Preservationist (CTP) credential is issued by the American Board for Transplant Certification (ABTC), and the exam is delivered by PSI at computer-based test centers. Everything in this guide is anchored to the Examination Content Outline for CTP in the ABTC Candidate Handbook (file dated August 13, 2026, PDF pages 39-40). Treat that outline as the contract between you and the exam: if a topic is not traceable to one of its five domain headings, it is a low-priority study target.

The outline lists each domain with item counts split across three cognitive levels: recall, application, and analysis. Adding those three columns together gives the number of scored items per domain. That detail matters for how you prepare. A domain with a heavy application or analysis column is not tested by asking you to recite definitions; it is tested by handing you a scenario and asking for the best next action or the best interpretation.

Each question has four options and exactly one best answer. "Best" is the operative word. On a credential like this one, two options can look defensible, and the scoring key rewards the answer that best fits accepted practice for the situation described. If you want a deeper look at how that plays out in difficulty terms, see our breakdown in How Hard Is the CTP Exam? Complete Difficulty Guide 2026.

Scored-Item Allocation by Domain

Of the 110 questions on the exam, 100 are scored and 10 are unscored pretest items. You will not be told which are which, so answer every question as if it counts. The five domains split the 100 scored items as follows:

Two domains, Organ Recovery and Organ Preservation, together account for 55 of the 100 scored items. That is the core of the exam. The remaining three domains contribute 45 items, and Specimen Collection, though the smallest at 12, is the kind of domain candidates underestimate and then lose points on because the questions are procedural and unforgiving.

One caution on interpretation: passing is not determined by passing each domain separately. ABTC bases the result on overall performance against an expert-established examination standard, and it does not publish a fixed numeric passing mark. For more on what is and is not known, read CTP Passing Score 2026: Exactly What You Need to Pass. Because the decision is overall, a strong showing in the two big domains can offset a weaker small domain, but you should not plan around that margin.

Domain 1: Professional Practice

Professional Practice carries 15 scored items. This domain is about the framework you work inside rather than the hands-on technique itself. Expect questions on scope of practice, documentation habits, communication across the recovery and transplant team, ethical conduct, and the regulatory and organizational expectations that govern organ work. Questions here tend to be situational: a discrepancy is noticed, a handoff is unclear, or a record is incomplete, and you choose the most appropriate response.

A common trap in this domain is choosing the answer that sounds most decisive. The best answer is usually the one that preserves accuracy, traceability, and appropriate escalation, not the one that moves fastest. Because this domain is mostly recall and application rather than deep analysis, it is one of the more efficient places to bank points early in your preparation.

Domain 2: Organ Recovery

Organ Recovery is the largest domain at 30 of 100 scored items, which makes it the single most valuable area to master. It covers the recovery process as it relates to the preservationist's role: the sequence of events around the recovery, the handling of the organ as it leaves the donor, the aseptic discipline that protects the organ, and the points at which preservation begins in earnest.

Because the domain is large, it will contain a spread of recall, application, and analysis items. The analysis-level questions are where preparation separates candidates. You may be given a short description of a deviation and asked to identify its most likely consequence or the most appropriate response. Memorizing a checklist will not carry you; understanding cause and effect will. Keep the educational purpose of this review distinct from clinical practice: verify your own organization's current policies before applying anything you read here on the job.

Domain 3: Organ Preservation

Organ Preservation holds 25 scored items and is the namesake of the credential. Where Organ Recovery focuses on the events of retrieval, this domain focuses on keeping the organ viable afterward: preservation solutions, temperature management, the principles behind static cold storage versus other preservation approaches, and the monitoring and documentation that accompany preservation.

Treat Domains 2 and 3 as a single continuous story: recovery hands the organ into preservation, and preservation hands it toward transport. Questions that straddle the boundary are fair game. A scenario might begin with a recovery-stage event and ask about its downstream effect on preservation, so study the handoffs, not just the silos. Our CTP Study Guide 2026: How to Pass on Your First Attempt maps these two domains onto a practical review order.

Domain 4: Specimen Collection

Specimen Collection is the smallest domain at 12 scored items, but its questions are procedural and precise. This domain concerns the samples collected in connection with the donor and organ: what is collected, how it is collected and labeled, how it is handled, and how it travels with or separately from the organ so that downstream testing and matching can be performed reliably.

With only 12 items, candidates are tempted to skim this domain. Resist that. Specimen questions are often the most mechanical on the exam, which means they are among the most winnable if you have drilled the specifics. A few well-learned rules here convert directly into points that would otherwise be lost to careless misreads.

Domain 5: Organ Labeling and Packaging for Transport

The final domain carries 18 scored items and covers the last controllable phase before the organ leaves your hands: labeling, packaging, and preparing the organ for transport. This is a high-consequence area because errors here can compromise identification, sterility, or temperature control at precisely the moment the organ is most dependent on the package around it.

This domain rewards a habit of verification. Many questions are really asking whether you would catch a mismatch, a missing element, or a packaging step done out of order before the package leaves. If you work in the field, you already have instincts here; the exam asks you to articulate them against the accepted standard rather than your local shortcut. A condensed list of the facts most likely to appear is on our CTP Cheat Sheet 2026: One-Page Review of Must-Know Facts.

Exam Format, Fees, and Scheduling Mechanics

Knowing the logistics removes avoidable stress on exam day. The exam is computer-based at PSI test centers, closed book, with calculators prohibited and two forms of identification required. You have two hours for 110 multiple-choice questions, 100 of which are scored.

Fees are nonrefundable and apply again if you reapply, which is why careful preparation has real financial value. After three unsuccessful attempts, you must earn 20 Category 1 CEPTCs before reapplying. For the full money picture, including renewal, see CTP Certification Cost 2026: Complete Pricing Breakdown, and for eligibility specifics, CTP Requirements 2026: Eligibility, Prerequisites & How to Qualify.

One scheduling subtlety deserves attention. Public instructions differ on when the 90-day eligibility window begins: at payment, at application approval, or at eligibility confirmation. Do not assume those triggers are interchangeable. Follow the dates printed on your own authorization, and resolve any discrepancy with ABTC or PSI before you book. Details on windows and deadlines live in CTP Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Sequencing Your Study Around the Domains

Rather than studying domains in numerical order, sequence them by value and dependency. Start with the foundations that touch everything, then build into the heavy domains, and finish with the precision-driven ones. Here is one domain-driven arrangement tied to the item counts above.

The reasoning is simple. The heavy domains deserve the longest runway and the most repetition. The two smaller procedural domains respond well to concentrated, late drilling because the facts are discrete. Adjust the pacing to your own background; a working preservationist may compress Week 1, while a candidate newer to the field may extend Weeks 2 and 3.

Original Practice Questions

The following questions are original and written for study purposes only. They are not actual exam items and are not represented as such. Use them to practice the best-answer format.

1. (Professional Practice) During a handoff, you notice that the paperwork lists an identifier that differs slightly from the identifier on the organ label. What is the best next step?

1. Correct the paperwork yourself to match the label and continue
2. Proceed, since minor differences rarely matter
3. Stop, escalate to the appropriate team member, and resolve the discrepancy before moving on
4. Wait until the organ arrives at its destination to raise the issue

Best answer: C. Identifier mismatches must be resolved through proper escalation before the process continues, not silently edited or deferred.

2. (Organ Preservation) A temperature reading during preservation falls outside the expected range. What is the most appropriate response?

1. Document it and take corrective action per the applicable protocol, notifying the right people
2. Ignore it if the organ looks unchanged
3. Remove the monitoring device to avoid confusion
4. Adjust the record so it reads within range

Best answer: A. Excursions are documented honestly and addressed through the established process and communication chain.

3. (Organ Labeling and Packaging for Transport) Why is verification performed before the package is sealed?

1. It is faster to verify after sealing
2. Errors found after sealing are harder to correct without compromising sterility and temperature control
3. Verification is optional if the label was printed correctly
4. It only matters for international transport

Best answer: B. Catching a problem before sealing protects identification, sterility, and temperature.

For more practice in the real format, use the full question sets on the CTP Exam Prep practice test site. PSI also lists a $60, 30-question Self-Assessment Examination with 60-day access and one scored attempt; only the public listing was reviewed, not the paid question bank, so evaluate it against your own needs. For a broader plan, see CTP Study Guide 2026: How to Pass on Your First Attempt.

Frequently Asked Questions