- CSFA Exam Snapshot: What You're Actually Facing
- Domain Breakdown and Where Points Live
- Registration, Fees, and Test Day Mechanics
- Building a Domain-Weighted Study Plan
- Understanding CSFA Question Style
- Common Reasons Candidates Fail on Attempt One
- Who Hires CSFAs and Why the Exam Matters
- Frequently Asked Questions
- You need 99 correct out of 150 scored questions to pass the CSFA exam.
- Perioperative Care is 55% of the exam - prioritize it above the other two domains combined.
- The exam is 175 questions (150 scored, 25 pretest) with a 4-hour limit at a PSI testing center.
- Candidates must graduate from a CAAHEP-accredited Surgical First Assistant program before applying.
CSFA Exam Snapshot: What You're Actually Facing
The Certified Surgical First Assistant (CSFA) credential is administered by the National Board of Surgical Technology and Surgical Assisting (NBSTSA), with testing delivered through PSI at approved computer-based testing centers. Before you build a study plan, you need to understand the shape of the test itself, because the CSFA exam is not structured like a typical certification quiz - it's a long, domain-heavy assessment that rewards depth in one specific area.
The exam consists of 175 total multiple-choice questions, but only 150 of those are scored. The remaining 25 are unscored pretest items that NBSTSA uses to evaluate future questions - you won't know which is which, so every question deserves your full attention. You have four hours to complete the exam, and passing requires 99 correct answers on the scored portion. That works out to roughly two-thirds accuracy, which sounds achievable until you realize the content is weighted heavily toward one demanding domain.
If you haven't already reviewed the full domain breakdown, the CSFA Exam Domains 2026: Complete Guide to All 3 Content Areas is worth reading alongside this guide, since domain weighting should drive nearly every decision you make about where to spend study hours.
Domain Breakdown and Where Points Live
The CSFA exam blueprint splits content into three domains, and the imbalance between them is the single most important fact in this entire guide:
Domain 1: Perioperative Care (55%)
This is the dominant domain, driven largely by Intraoperative Procedures - the technical, hands-on knowledge of assisting during surgery itself. If you only had time to master one domain, this would be it, simply because it accounts for more than half the scored questions.
- Tissue handling, exposure, and retraction techniques
- Hemostasis methods and wound closure decisions
- Pre- and postoperative patient positioning and preparation considerations
Domain 2: Ancillary Duties (14%)
The smallest domain by weight, but not one to ignore - a candidate who skips it entirely can lose enough points to jeopardize the 99-question threshold.
- Documentation and administrative responsibilities tied to surgical assisting
- Equipment and supply coordination duties outside the direct surgical field
Domain 3: Basic Science (31%)
The second-largest domain, covering the foundational knowledge that underpins everything a first assistant does in the operating room.
- Anatomy and physiology as applied to surgical procedures
- Microbiology and infection control principles
- Pharmacology relevant to the perioperative setting
For a deeper walkthrough of each content area, the dedicated domain guides go much further than an overview can: CSFA Domain 1: Perioperative Care (55%) - Complete Study Guide 2026, CSFA Domain 2: Ancillary Duties (14%) - Complete Study Guide 2026, and CSFA Domain 3: Basic Science (31%) - Complete Study Guide 2026.
Registration, Fees, and Test Day Mechanics
Understanding the administrative side of the CSFA exam prevents avoidable surprises on test day. The exam fee is $240 for AST members and $350 for everyone else - a meaningful difference that makes AST membership worth evaluating before you register. If you need a full cost comparison including renewal fees, see CSFA Certification Cost 2026: Complete Pricing Breakdown.
Eligibility requires graduation from a CAAHEP-accredited Surgical First Assistant program - there's no substitute pathway for the current exam version, which follows the 2025 Candidate Handbook, 1st Edition. Once you're eligible and registered, you'll test at a PSI testing center under strict conditions:
- No textbooks, notes, study materials, personal electronics, or personal items allowed in the testing room
- Scratch paper is provided by the testing center and must be returned before you leave
- You have a firm four-hour window for all 175 questions
Renewal happens on a cycle: you can renew with AST-approved continuing education credits submitted to AST along with a renewal application to NBSTSA for a $45 CE fee, or recertify by exam for $450 (AST member) or $550 (non-member). Planning your CE credits early avoids a costly re-exam scenario down the road.
Key Takeaway
Confirm your CAAHEP program eligibility and AST membership status before registering - both directly affect your fee and your ability to sit for the exam at all.
Building a Domain-Weighted Study Plan
Generic study techniques like spaced repetition or timed practice blocks only help if they're pointed at the right material. For the CSFA exam, that means allocating study time roughly in proportion to domain weight rather than splitting hours evenly across three domains.
Perioperative Care Deep Dive
- Work through Intraoperative Procedures topics daily, since this subtopic drives most of Domain 1's 55% weight
- Practice scenario-based recall of retraction, hemostasis, and closure decisions
Basic Science Foundations
- Review anatomy, physiology, microbiology, and pharmacology as they connect to surgical scenarios, not in isolation
- Use spaced repetition specifically for pharmacology terminology, which tends to fade fastest without reinforcement
Ancillary Duties and Integration
- Cover documentation and coordination duties - lower weight, but fast to review and easy points if learned well
- Run full-length timed practice sets covering all three domains together
If you want a broader overview of pacing and resources before committing to a timeline, revisit CSFA Study Guide 2026: How to Pass on Your First Attempt for the full framework this schedule is built from.
Understanding CSFA Question Style
The CSFA exam uses computer-based multiple-choice questions exclusively - there are no simulations, essay responses, or oral components. But "multiple choice" doesn't mean simple recall. Many questions on the Perioperative Care domain present a brief surgical scenario and ask you to identify the correct assisting action, meaning you need applied judgment, not just memorized facts.
Because 25 of the 175 questions are unscored pretest items mixed in without identification, you should treat every question with equal seriousness rather than trying to guess which ones "count." This also means an unusually difficult or oddly worded question you encounter might not even factor into your score - don't let it derail your confidence for the rest of the exam.
To get a realistic sense of question phrasing and difficulty before test day, review Best CSFA Practice Questions 2026: What to Expect on the Exam, and run full practice sessions on the CSFA practice test platform to simulate the four-hour pacing under real conditions.
Common Reasons Candidates Fail on Attempt One
With a 62% first-take pass rate nationally in 2025, it's worth being honest about where candidates typically lose points. The patterns are consistent enough to plan around:
- Underweighting Basic Science. At 31% of the exam, this domain is too large to treat as a "quick refresher" - it needs dedicated study time, not just a night of flashcards.
- Studying material, not scenarios. Because many Perioperative Care questions are scenario-based, memorizing definitions without practicing applied decision-making leaves gaps.
- Ignoring Ancillary Duties entirely. At 14%, it's tempting to skip, but that's still roughly 21 questions on the scored exam - enough to matter when you need 99 correct.
- Not simulating the four-hour format. Fatigue late in a long exam is real; candidates who never practiced full-length timed sessions often see performance drop in the final section.
For a broader look at what makes this exam genuinely challenging compared to other certifications, see How Hard Is the CSFA Exam? Complete Difficulty Guide 2026, and for the full statistical picture, CSFA Pass Rate 2026: What the Data Shows breaks down what the pass rate actually tells you about preparation expectations.
Who Hires CSFAs and Why the Exam Matters
The CSFA credential isn't just a box to check - it signals to hospitals, surgical centers, and physician practices that you've demonstrated competency across the full scope of first-assisting work, from intraoperative technique to foundational science. Employers hiring for CSFA roles are typically looking for candidates who completed a CAAHEP-accredited program and hold current, verifiable certification through NBSTSA.
If you're still early in exploring this career path, it helps to step back and confirm the fundamentals: What Is CSFA? and CSFA Certification cover the basics of the role and credential, while CSFA Jobs outlines the kinds of positions and practice settings that typically require or prefer this certification. For those weighing whether the investment of time and the exam fee is worthwhile, Is the CSFA Certification Worth It? Complete ROI Analysis 2026 and CSFA Salary Guide 2026: Complete Earnings Analysis go deeper into earnings and career outcomes.
Key Takeaway
Passing on your first attempt saves more than a $350 (or $240 AST-member) exam fee - it avoids the $450-$550 recertification-by-exam cost and keeps your career timeline on track.
Frequently Asked Questions
You need 99 correct answers out of the 150 scored questions. The exam includes 175 total questions, but 25 are unscored pretest items that don't count toward your score.
Perioperative Care, which makes up 55% of the exam and is driven largely by Intraoperative Procedures content. Basic Science at 31% is the second priority, with Ancillary Duties at 14% rounding out your study plan.
No. PSI testing centers prohibit textbooks, notes, study materials, personal electronics, and personal items in the testing room. You'll be given scratch paper, which must be returned before you leave.
You can recertify or retest, but exam-based recertification costs $450 for AST members or $550 for non-members, which is more than the original exam fee. Thorough first-attempt preparation is the more cost-effective path.
Membership isn't required to sit for the exam, but it does affect your cost: AST members pay $240 while non-members pay $350. You must still be a graduate of a CAAHEP-accredited Surgical First Assistant program regardless of membership status.