- CRT stands for Certified Respiratory Therapist, awarded by the NBRC after passing the TMC Exam.
- The TMC Exam has 160 questions (140 scored, 20 pretest) with a 3-hour limit, delivered by PSI.
- Interventions is the heaviest domain, covering 70 of the 140 scored questions.
- New applicants pay USD 190; repeat applicants pay USD 150 for the TMC through 2026.
The Answer: What CRT Stands For
CRT stands for Certified Respiratory Therapist. It is the entry-level credential in respiratory care, issued by the National Board for Respiratory Care (NBRC) to candidates who pass the Therapist Multiple-Choice (TMC) Examination and meet the low cut score. It's worth being precise here, because "CRT" is used by a handful of unrelated fields for completely different purposes. On this site, and in this article, CRT refers exclusively to the respiratory care credential - nothing else. If you landed here searching for the meaning of the acronym, this page and our companion piece, CRT Meaning, walk through the full definition in plain language.
The Credential Behind the Letters
Respiratory therapy graduates who complete at least an associate degree from a CoARC-supported or accredited entry-to-practice program, and who are 18 or older, become eligible to sit for the TMC Exam. Passing at the low cut score earns the CRT designation. Score at the high cut instead, and you not only earn CRT - you also establish eligibility for the Clinical Simulation Examination (CSE) if you meet the additional RRT admission requirements. In other words, the same exam event can open two different doors depending on how well you perform.
This two-tier scoring structure is unique to the TMC and is one of the more misunderstood parts of the process. Many candidates assume CRT and RRT (Registered Respiratory Therapist) come from separate tests. They don't - at least not through 2026. One exam, two cut scores, two possible outcomes. For a deeper breakdown of eligibility rules, see CRT Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Key Takeaway
Meeting the low cut score on the TMC Exam earns you the CRT credential. Meeting the high cut score can also open the path toward RRT eligibility - same exam, different outcomes.
The TMC Exam That Awards the CRT
The Therapist Multiple-Choice Examination is a computer-based test delivered through PSI testing centers. It consists of 160 multiple-choice questions - 140 of which are scored, with 20 unscored pretest items mixed in so candidates can't tell which questions count. You get a 3-hour time limit, access to an onscreen calculator, and there is no penalty for guessing, so every question should get an answer before time runs out.
Because the pretest items are indistinguishable from scored ones, the only sound strategy is to treat every question as if it counts. Trying to guess which items are "just pretesting" wastes mental energy you need for the real content. If you want a fuller walkthrough of exam mechanics, pacing, and format quirks, our CRT Study Guide 2026: How to Pass on Your First Attempt goes into more depth, and How Hard Is the CRT Exam? Complete Difficulty Guide 2026 puts the difficulty in context using the actual pass-rate data below.
| Exam Detail | TMC Exam (through 2026) |
|---|---|
| Total Questions | 160 (140 scored, 20 pretest) |
| Time Limit | 3 hours |
| Testing Provider | PSI |
| New Applicant Fee | USD 190 |
| Repeat Applicant Fee | USD 150 |
| Application Deadline | December 15, 2026 |
| Last Testing Date | December 31, 2026 |
What the Exam Actually Tests
The current TMC blueprint has been in effect since January 2020 and runs through December 2026. It's organized into three content domains, and understanding how heavily each one is weighted matters more than most candidates realize.
Domain 1: Patient Data
Covers gathering and interpreting patient information - history, physical exam findings, diagnostic results, and monitoring data - needed to make sound clinical decisions.
- Interpreting labs, imaging, and bedside assessment findings
- Recognizing when data indicates a change in patient status
Domain 2: Troubleshooting and Quality Control of Devices, and Infection Control
Focuses on equipment function, malfunction recognition, quality control procedures, and infection prevention practices tied to respiratory equipment and patient care.
- Identifying and correcting equipment malfunctions
- Applying infection control principles during device use
Domain 3: Initiation and Modification of Interventions
The largest domain by far, testing your ability to initiate, adjust, and manage therapeutic interventions safely and appropriately.
- Accounts for 70 of the 140 scored items - half the exam
- Demands strong command of ventilator management, oxygen therapy, and emergency response scenarios
The official scored-item allocation is 50 items for Patient Data, 20 for Troubleshooting/Quality Control/Infection Control, and 70 for Interventions. That means Interventions alone makes up exactly half of the scored exam. Any study plan that spends equal time on all three domains is misallocating effort. For a full content breakdown with sample topics inside each domain, check CRT Exam Domains 2026: Complete Guide to All 3 Content Areas.
Who Hires People With "CRT" After Their Name
The CRT credential is the baseline license-supporting qualification most hospitals, skilled nursing facilities, home care companies, and durable medical equipment providers look for when hiring entry-level respiratory therapists. It signals that a graduate has met the NBRC's minimum competency bar across patient assessment, equipment management, and clinical interventions. Many employers treat CRT as the credential that gets a new graduate in the door, with RRT often expected or preferred for advancement later in a career. If you're mapping out where this credential can take you, CRT Jobs covers common employment settings, and CRT Salary Guide 2026: Complete Earnings Analysis and Is the CRT Certification Worth It? Complete ROI Analysis 2026 address the return-on-investment questions candidates ask most.
Cost, Deadlines, and What Changes in 2027
New applicants pay USD 190 to sit for the TMC Exam; candidates retesting pay USD 150. Beyond initial certification, CRT holders maintain their credential on a five-year cycle involving quarterly assessments. Depending on performance, you'll owe 0, 15, or 30 continuing education credits, or you can pursue an eligible examination-based renewal instead. The Continuing Maintenance Program (CMP) fee is USD 125 per five-year cycle, typically collected as USD 25 annually. Full pricing details, including how these numbers stack up over a career, live at CRT Certification Cost 2026: Complete Pricing Breakdown.
Timing matters right now more than usual. TMC applications close December 15, 2026, and testing under the current format ends December 31, 2026. Starting January 4, 2027, the NBRC replaces the TMC with a new Respiratory Therapy Examination: 185 total questions (160 scored, 25 pretest), a 4-hour time limit, and fees of USD 360 for new applicants and USD 300 for repeat applicants. The new exam still keeps separate CRT and RRT cut scores, similar in spirit to the current structure, but it is a distinct question bank - don't mix 2026 and 2027 prep material. If your testing window falls near this cutover, review CRT Exam Dates 2026: Testing Windows, Deadlines & Scheduling before you register.
Key Takeaway
If you can test before December 31, 2026, you're on the current 160-question TMC format at the current fee. After that date, you're on the new 185-question exam with higher fees and a longer time limit.
A CRT-Specific Way to Plan Your Prep
Generic study advice tells you to review everything evenly. The TMC blueprint tells you not to. Since Interventions carries 70 of 140 scored points, Patient Data carries 50, and Troubleshooting/Quality Control/Infection Control carries just 20, your weekly plan should mirror that weighting rather than splitting time into thirds.
Patient Data Foundations
- Review lab values, vital signs, and diagnostic interpretation
- Practice recognizing status changes from patient data alone
Troubleshooting, QC, and Infection Control
- Study common equipment malfunctions and corrective actions
- Cover infection control protocols tied to device use - it's a smaller domain but still high-yield per hour invested
Interventions Deep Dive
- Spend double the time here since it's half the scored exam
- Drill ventilator management, oxygen therapy titration, and emergency interventions with scenario-based practice
Timed Practice and Review
- Run full-length, timed practice sessions under the 3-hour limit
- Revisit weak domains identified during practice rather than restarting from scratch
Running timed, scenario-based questions on our practice test platform is one of the fastest ways to see whether your Interventions knowledge holds up under exam-style pressure rather than just in a textbook. Since guessing carries no penalty, practicing your pacing on realistic practice questions also builds the instinct to mark, move on, and never leave a question blank. For a compact reference during your final review, bookmark the CRT Cheat Sheet 2026: One-Page Review of Must-Know Facts, and confirm your target score against CRT Passing Score 2026: Exactly What You Need to Pass before test day.
Frequently Asked Questions
CRT stands for Certified Respiratory Therapist, a credential issued by the National Board for Respiratory Care after a candidate passes the TMC Exam and meets the low cut score.
No. CRT is earned by meeting the low cut score on the TMC Exam. Meeting the high cut score on the same exam instead establishes eligibility toward RRT if additional admission requirements are met, but CRT and RRT remain distinct credentials.
The National Board for Respiratory Care (NBRC) owns the credential and exam content, while PSI administers the computer-based TMC Exam at testing centers.
New applicants pay USD 190, and repeat applicants pay USD 150, through the TMC Exam's availability window ending December 31, 2026.
Yes. Starting January 4, 2027, a new Respiratory Therapy Examination replaces the TMC, featuring 185 questions, a 4-hour limit, and updated fees of USD 360 new and USD 300 repeat, while still maintaining separate CRT and RRT cut scores.