What Is RRT?

What RRT Means (and What It Does Not)

RRT stands for Registered Respiratory Therapist. It is the advanced-level credential in respiratory care, issued by the National Board for Respiratory Care (NBRC). Employers, state licensing boards, and hospital credentialing offices recognize it as evidence that a therapist can assess patients, troubleshoot life-support equipment, and initiate or modify therapy with clinical judgment. If you want the shorter definitional versions of this topic, our pages on what RRT stands for and what a RRT is cover the basics, while this article goes deeper into how the credential is earned and what the exams test.

The acronym "RRT" is shared by several unrelated credentials in other fields. Everything on this page refers only to the respiratory therapy credential. If you arrived looking for a different certification that happens to use the same letters, the details here (the NBRC, the TMC, the CSE) will not apply to it.

For a respiratory therapist, "registered" is a specific tier. Candidates generally pass through entry-level credentialing steps and then demonstrate advanced competency on a second, more clinical examination. That second step is what separates the registry credential from the base-level certification. For more on how the certification itself is framed, see our overview of what RRT certification is.

The Two-Exam Route to the Credential

Under the current 2026 route, earning the RRT is a two-stage process, and the two stages are separate examinations, not one long appointment.

1. Therapist Multiple-Choice Examination (TMC). You must reach the TMC high cut score. A result at the lower cut score leads to the entry-level credential path, not the registry.
2. Clinical Simulation Examination (CSE). After a qualifying high-cut TMC result, you sit the CSE. Passing it is what awards the RRT.

Pretest items and problems are unscored questions the NBRC uses to evaluate future content, and you cannot tell which ones they are. Treat every item as if it counts. Current numeric cut scores have not been verified for this article, so rather than quoting a number, check the NBRC's current materials; our RRT passing score guide tracks what is and is not publicly confirmed.

The Six Domain Headings Across Both Exams

The NBRC publishes a separate detailed content outline for each exam. Domains 1 through 3 are the official TMC headings, and Domains 4 through 6 are the official CSE headings. The count of six comes from combining the two outlines; it is not a single six-domain exam, and no combined weighting exists. Repeated headings and the small wording difference between "Devices" and "Equipment" are intentional and reflect how each outline is worded.

On the TMC, scored allocations are 50 items for Patient Data, 20 for the troubleshooting and infection-control domain, and 70 for Initiation and Modification of Interventions. Interventions carries the largest allocation, which is a useful signal for where to concentrate your hours. I am deliberately not converting these into percentages or merging them with CSE figures, since no combined domain weights have been established.

For a section-by-section walkthrough, see our RRT exam domains guide.

How the Questions Actually Look

TMC: single-answer multiple choice

The TMC presents 160 multiple-choice questions, of which 140 are scored. Expect scenario-based stems: a patient with a stated diagnosis, a set of arterial blood gas values, a ventilator setting, and a question about the best next step. Questions often test whether you can recognize a trend and choose the safest, most appropriate intervention rather than recall an isolated fact. Both exams are closed book, and the only calculator permitted is the virtual one supplied in the testing software.

CSE: interactive patient simulations

The CSE is the format that surprises candidates the most. It contains 22 problems, 20 scored and two pretest, in a four-hour window. Each problem can contain multiple sections and multiple choices. You are given a patient scenario, then make decisions that shape what happens next. It is closer to managing a case than answering a quiz.

The 2026 Candidate Handbook specifies a single CSE score summed across the examination. It does not set separate pass thresholds for information gathering and decision making, so you cannot offset a weak area with a strong one in the way older descriptions sometimes implied. Read any older CSE advice with that in mind.

The scored cases are assembled from these groups:

Because the formats differ so much, it helps to understand the difficulty profile of each before committing to a plan. Our RRT exam difficulty guide breaks that down.

Who Can Sit for the Exams

Standard eligibility is straightforward: you must be 18 or older and hold at least an associate degree from an eligible entry-into-practice respiratory program supported or accredited through CoARC. The CSE adds further conditions: you need CRT status and a qualifying high-cut TMC result.

The NBRC also lists conditional legacy routes for credentialed practitioners who did not follow the standard degree path:

• Four years as a CRT plus 62 specified college hours
• Two years as a CRT plus a qualifying respiratory associate degree
• Two years as a CRT plus a non-respiratory bachelor's degree and 62 specified hours
• A separately listed route for CSRT holders

These exceptions do not automatically carry into the 2027 pathway, so do not assume a legacy route will remain available. A deeper walkthrough lives in our RRT requirements guide.

Fees, Testing Sites, and Retake Rules

Exams are delivered at supervised PSI assessment centers. Live remote proctoring ended December 31, 2024, so initial at-home delivery is not a current option. The issuer's announcement is on the NBRC website.

The USD 40 discount applies once, to a first CSE, for eligible AARC members who use the prescribed application process. These totals exclude your education, preparation materials, membership dues, and state licensure costs. For the full picture, see our RRT certification cost breakdown.

Retake and scheduling rules

• For each exam, three initial attempts are permitted without the subsequent-attempt waiting interval.
• Later attempts require 120 days between attempts.
• Break time counts against your examination time, so a bathroom break is not free.

Pass-rate data helps put retakes in perspective. For calendar 2025, the TMC high-cut pass rate was 68.2% for new candidates and 29.4% for repeat candidates; the low-cut rates were 78.5% new and 48.9% repeat. CSE rates were 63.6% new and 53.0% repeat. These are separate cohorts, not a combined probability of becoming an RRT. The NBRC reported 11,086 TMC administrations, 9,004 CSE administrations, and 5,196 RRT credentials awarded. The gap between new and repeat results is the practical lesson: preparing thoroughly for the first attempt matters. More context is in our RRT pass rate analysis.

Where Registered Respiratory Therapists Work

The credential is built for clinical work, and the employers reflect that. Hospitals are the largest setting, spanning adult, pediatric, and neonatal intensive care units, emergency departments, and general medical-surgical floors. Beyond acute care, registered therapists work in:

• Long-term acute care and skilled nursing facilities
• Pulmonary rehabilitation and outpatient pulmonary function laboratories
• Home care and home ventilator programs
• Sleep centers and diagnostic labs
• Neonatal and pediatric transport teams
• Education, management, and clinical specialist roles

Many employers either require the RRT or prefer it for ICU, ventilator-management, and leadership positions. Job titles and expectations vary by region and facility, so check current postings in your area; our RRT jobs overview covers common roles. On compensation, we avoid quoting unverified figures here, but you can find a structured discussion in the RRT salary guide, and a return-on-investment view in Is the RRT certification worth it?

Keeping the Credential Active

Once earned, the RRT is maintained through the NBRC's five-year Credential Maintenance Program (CMP). A published exemption exists for credentials earned before July 1, 2002. Within the program, you can satisfy the requirement in one of several ways:

• Assessment-based continuing education: zero, 15, or 30 Category I credits depending on your performance on the assessment.
• Passing the highest relevant examination during the final year of the maintenance cycle.
• Earning an additional qualifying NBRC credential.

The CMP payment is USD 25 per payment year before 2027 and USD 30 beginning in 2027. One caution: the CMP brochure's parsed text and rendered page show mixed old and new fee versions, but the issuer's live FAQ confirms the 2027 effective date. When in doubt, trust the live FAQ over a downloaded PDF.

The 2027 Transition You Should Know About

Beginning in January 2027, the NBRC introduces a single exam called the Respiratory Therapy Examination. It has 185 multiple-choice questions (160 scored, 25 pretest) with four hours allowed, and fees of USD 360 new and USD 300 repeat. Its lower and higher cut scores lead directly to the CRT or RRT credential. Applications opened October 1, 2026, with first availability on January 4, 2027.

Keep the two eras separate in your head. The future exam has its own content outline, and this article does not blend its content into the current TMC and CSE domains. There is also an unresolved wording conflict worth flagging: issuer language about achieving the TMC high cut "prior to December 31, 2026" sits uneasily with the announced final testing date, so anyone planning to test on December 31 should get confirmation from the NBRC about whether that result still qualifies. Our RRT exam dates guide tracks deadlines as they are clarified.

Sequencing Your Preparation by Domain

Rather than repeat generic study advice, here is one RRT-specific way to order your weeks, based on how the two exams are built. The logic: Interventions carries the heaviest TMC allocation, Patient Data feeds every other domain, and the CSE rewards clinical reasoning that only develops after the fundamentals are solid.

Adjust the pacing to your own schedule and strengths; the point is the order, not the exact week count. For a fuller plan, read our RRT study guide, keep the RRT cheat sheet handy for last-minute review, and use the RRT practice tests to rehearse the timing and style of the real exams.

Frequently Asked Questions

Understanding what the RRT is, how the two exams fit together, and how the transition will affect your timeline puts you in a far stronger position than most candidates. For the credential overview in one place, see our main page on RRT certification, and explore RRT training options if you are still choosing a program.