- What the Letters CSFA Actually Mean
- Who Grants the Credential and How It's Tested
- Who Can Use the CSFA Title
- Inside the Exam: Format, Timing, and Scoring
- What CSFA Actually Tests: The Three Domains
- Cost and Renewal Mechanics
- What a CSFA Does Day to Day
- When to Schedule Your Study Time by Domain
- Frequently Asked Questions
- CSFA stands for Certified Surgical First Assistant, credentialed by the NBSTSA.
- The exam has 175 questions (150 scored) with a 4-hour limit at PSI test centers.
- Passing requires 99 correct answers out of the 150 scored questions.
- Perioperative Care makes up 55% of the exam, the largest of three domains.
What the Letters CSFA Actually Mean
CSFA stands for Certified Surgical First Assistant. Each word in that phrase describes a specific function in the operating room, and understanding them individually helps explain why the credential exists and what it authorizes a professional to do.
"Certified" means the individual has passed a standardized, national credentialing exam rather than simply completing on-the-job training. "Surgical" places the role squarely inside the operating room, working directly with the surgeon rather than in a supporting or preoperative capacity only. "First Assistant" is the operative term - it identifies the person who works at the surgical field, providing exposure, hemostasis, tissue handling, and other hands-on tasks that go beyond what a surgical technologist typically performs.
If you're still comparing this credential to adjacent titles in surgical services, the article What Is CSFA? and the companion piece CSFA Meaning break down how the role differs from a scrub tech or a PA working in surgery. For a more literal breakdown of the acronym itself, see What Does CSFA Stand For?.
Who Grants the Credential and How It's Tested
The CSFA credential is issued by the National Board of Surgical Technology and Surgical Assisting (NBSTSA). The NBSTSA sets the eligibility requirements, writes and maintains the exam content outline, and determines passing standards. Actual test delivery is handled by PSI, a third-party testing provider that operates computer-based testing centers.
This split matters practically: your application, transcripts, and program verification go through NBSTSA, but your actual exam appointment, check-in, and testing-room rules are governed by PSI. On exam day, PSI testing centers do not allow textbooks, notes, study materials, personal electronics, or personal items inside the testing room. You'll be given scratch paper for calculations or notes during the exam, and it must be returned before you leave - nothing leaves the room with you.
For a deeper look at how this governing structure compares to other surgical credentials, CSFA Certification and What Is CSFA Certification? walk through the full credentialing pathway.
Who Can Use the CSFA Title
Not everyone working in an assisting role in the OR is eligible to sit for the CSFA exam. The NBSTSA requires candidates to be a graduate of a CAAHEP-accredited Surgical First Assistant program. This is a formal academic requirement - clinical experience alone, without completion of an accredited program, does not qualify a candidate to test.
This eligibility rule is one reason CSFA carries weight with employers: everyone who holds the credential has passed through the same accredited educational pipeline and the same standardized exam, rather than an informal mix of hospital-specific training. If you're deciding whether pursuing this path makes sense for your career, Is the CSFA Certification Worth It? Complete ROI Analysis 2026 lays out the tradeoffs in more detail, and CSFA Training covers what accredited programs typically include.
Inside the Exam: Format, Timing, and Scoring
The CSFA exam is a computer-based, multiple-choice test administered at PSI testing centers. Here's what candidates are actually working with on test day:
- 175 total questions - 150 are scored and count toward your result; 25 are unscored pretest items used to evaluate future exam questions. You won't know which is which, so every question should be treated as scored.
- 4-hour time limit for the full exam.
- Passing score: 99 correct answers out of the 150 scored questions.
- Format: single-best-answer multiple choice delivered entirely on computer, per the 2025 CSFA Candidate Handbook, 1st Edition.
The 62% national first-take pass rate reported for 2025 tells you this exam is passable but not trivial - a meaningful share of first-time candidates do not clear the 99-question threshold. For a full breakdown of how that number breaks down and what it implies about preparation, see CSFA Pass Rate 2026: What the Data Shows and How Hard Is the CSFA Exam? Complete Difficulty Guide 2026.
Key Takeaway
Because 25 of the 175 questions are unscored and indistinguishable from scored ones, pace yourself for the full 175 rather than trying to guess which questions "count."
What CSFA Actually Tests: The Three Domains
The CSFA exam content outline is organized into three domains, and they are not weighted evenly. Understanding this weighting is the single most useful piece of information for planning study time.
| Domain | Weight | Focus |
|---|---|---|
| Perioperative Care | 55% | Preoperative, intraoperative, and postoperative patient care, with Intraoperative Procedures as the dominant subtopic |
| Basic Science | 31% | Anatomy, physiology, microbiology, pharmacology, and wound healing as they apply to surgical assisting |
| Ancillary Duties | 14% | Administrative, professional, and supportive tasks surrounding the surgical role |
Domain 1: Perioperative Care (55%)
This is by far the largest domain, and it is driven largely by Intraoperative Procedures - the actual hands-on work at the surgical field. Candidates need command over:
- Tissue handling, exposure, and retraction techniques across surgical specialties
- Hemostasis methods and management of intraoperative bleeding
- Suturing, knot-tying, and wound closure principles
- Preoperative assessment and positioning, and postoperative wound care
Domain 2: Ancillary Duties (14%)
The smallest domain by weight, but not one to skip. It covers the professional and administrative layer around the surgical role, including documentation, legal and ethical responsibilities, equipment care, and coordination with the surgical team outside the immediate operative task.
Domain 3: Basic Science (31%)
This domain tests the scientific foundation behind assisting decisions - anatomy and physiology relevant to specific procedures, microbiology and infection control principles, pharmacology used intraoperatively, and the physiology of wound healing.
For a question-by-question breakdown of how each domain is tested, the dedicated guides are worth bookmarking: CSFA Domain 1: Perioperative Care (55%), CSFA Domain 2: Ancillary Duties (14%), and CSFA Domain 3: Basic Science (31%). The full-domain overview at CSFA Exam Domains 2026: Complete Guide to All 3 Content Areas ties all three together with cross-domain study strategy.
Cost and Renewal Mechanics
The CSFA exam fee depends on AST membership status: $240 for AST members versus $350 for all others. That fee difference alone is often enough to justify joining AST before registering, depending on membership cost.
Once certified, you have two renewal paths:
- Renewal by continuing education (CE): $45 fee, requiring AST-approved CE credits submitted to AST along with a renewal application submitted to NBSTSA.
- Renewal by examination: $450 for AST members or $550 for non-members - essentially retaking the credentialing exam instead of accumulating CE credits.
Most certified professionals choose the CE route since it's substantially cheaper and doesn't require re-sitting a 175-question, 4-hour exam. A full pricing breakdown covering both the initial exam and every renewal scenario is available in CSFA Certification Cost 2026: Complete Pricing Breakdown.
What a CSFA Does Day to Day
Understanding the acronym is easier once you see it applied to real work. CSFAs are typically employed by hospitals, surgical specialty groups, ambulatory surgery centers, and academic medical centers where surgeons need a dedicated first assistant rather than relying solely on residents or physician assistants.
On a given surgical day, a CSFA's responsibilities generally include:
- Positioning and prepping the patient before the surgeon arrives at the field
- Providing exposure and retraction throughout the procedure
- Controlling bleeding through direct pressure, clamping, or electrocautery as directed
- Suturing at the surgeon's direction, including closing incisions
- Assisting with postoperative dressing and documentation
This is distinct from a surgical technologist, who typically manages the sterile field and instruments from outside the direct assisting role, and from circulating nurses, who manage the room rather than the field itself. If you're researching where these jobs are posted and what titles to search for, CSFA Jobs and CSFA Salary Guide 2026: Complete Earnings Analysis cover the employment landscape in more depth.
When to Schedule Your Study Time by Domain
Given that Perioperative Care carries more than half the exam's weight, it deserves more calendar time than the other two domains combined - but not at the total exclusion of Basic Science, which still accounts for roughly a third of scored questions.
Basic Science Foundation
- Review anatomy and physiology relevant to common procedures
- Study pharmacology used intraoperatively and wound-healing physiology
Perioperative Care Deep Dive
- Focus heavily on Intraoperative Procedures, the largest subtopic
- Drill tissue handling, hemostasis, suturing, and positioning scenarios
Ancillary Duties and Integration
- Cover documentation, legal/ethical responsibilities, and equipment protocols
- Run full-length timed practice sets to simulate the 4-hour, 175-question format
This sequencing puts the science foundation first so that the heavier Perioperative Care content makes more sense when you get to it, and it leaves the smallest domain for last since it requires less depth. For a complete week-by-week plan tied to specific resources, see CSFA Study Guide 2026: How to Pass on Your First Attempt. Once you've covered content, timed practice on a full-length practice test platform is the best way to confirm you can finish 175 questions inside 4 hours. The Best CSFA Practice Questions 2026: What to Expect on the Exam guide also shows exactly how NBSTSA-style questions are worded, which matters more than raw content review once you're within a few weeks of test day.
Key Takeaway
Don't let the 14% weight of Ancillary Duties tempt you into skipping it - with only 150 scored questions, every domain still contributes real points toward the 99 you need.
Frequently Asked Questions
CSFA stands for Certified Surgical First Assistant, a credential issued by the National Board of Surgical Technology and Surgical Assisting (NBSTSA) to professionals who assist surgeons directly at the operative field.
No. A surgical technologist typically manages the sterile field and instruments, while a CSFA works directly at the operative field alongside the surgeon, providing exposure, hemostasis, and suturing under direct supervision.
Candidates must be a graduate of a CAAHEP-accredited Surgical First Assistant program before they are eligible to register for and sit the NBSTSA CSFA exam.
The exam has 175 total questions - 150 scored and 25 unscored pretest items - delivered over a 4-hour time limit. Passing requires 99 correct answers out of the 150 scored questions.
The exam fee is $240 for AST members and $350 for all other candidates. Renewal costs differ depending on whether you renew by continuing education ($45) or by examination ($450 for AST members, $550 for non-members).