- What CSFA Certification Actually Is
- Who Runs the Exam: NBSTSA and PSI
- Eligibility and Prerequisites
- Exam Format, Scoring, and Timing
- The Three Exam Domains Explained
- Fees, Registration, and Renewal Mechanics
- How Difficult Is the CSFA Exam?
- Building a Domain-Weighted Prep Schedule
- Who Hires CSFAs
- Frequently Asked Questions
- The exam has 175 questions (150 scored, 25 unscored pretest) with a 4-hour limit at PSI centers.
- You need 99 correct scored answers to pass; Perioperative Care makes up 55% of content.
- Fees run $240 for AST members and $350 for everyone else, per the 2025 NBSTSA handbook.
- Only graduates of a CAAHEP-accredited Surgical First Assistant program are eligible to sit for the exam.
What CSFA Certification Actually Is
CSFA certification is the credential awarded by the National Board of Surgical Technology and Surgical Assisting (NBSTSA) to surgical professionals who demonstrate competency as first assistants in the operating room. If you've landed here after searching What Is CSFA? or CSFA Meaning, the short version is this: it's a national, standardized exam that verifies you can safely handle tissue, provide exposure, control bleeding, and support a surgeon through an entire procedure - not just assist with instruments.
This article focuses specifically on the mechanics of the certification itself: who administers it, what's on it, how much it costs, and how the content is weighted. For a broader breakdown of the credential's meaning and history, see What Is CSFA Certification? and What Does CSFA Stand For?.
Who Runs the Exam: NBSTSA and PSI
The NBSTSA writes the exam blueprint, sets eligibility rules, and issues the credential. Actual test delivery is outsourced to PSI, a third-party testing vendor that operates computer-based testing centers nationwide. This split matters practically: policy questions (eligibility, renewal, CE requirements) go through NBSTSA and AST, while scheduling, rescheduling, and test-day logistics go through PSI.
Eligibility and Prerequisites
Unlike some allied health certifications that allow multiple pathways to eligibility, the CSFA exam has one route: you must be a graduate of a CAAHEP-accredited Surgical First Assistant program. There is no work-experience-only pathway and no substitution for formal accredited education. If you're still researching whether this credential fits your career, Is the CSFA Certification Worth It? Complete ROI Analysis 2026 walks through the return on investment in more depth.
Because eligibility is tied to program accreditation, candidates should confirm their program's CAAHEP status before applying - not after. NBSTSA will not process an application for a non-accredited program graduate.
Exam Format, Scoring, and Timing
The CSFA exam is a computer-based, multiple-choice test administered at PSI testing centers. Here's exactly what you're walking into:
- Total questions: 175 (150 scored, 25 unscored pretest items you can't identify during the test)
- Time limit: 4 hours
- Passing score: 99 correct answers out of the 150 scored questions
- Format: Single-best-answer multiple choice, delivered on-screen
Because the 25 pretest questions are mixed in and unidentifiable, you have to treat every question on the screen as if it counts. Pacing matters - with 175 questions in 240 minutes, you have roughly 82 seconds per question if you use the full time evenly, though most candidates move faster through familiar material and slow down on scenario-based items.
The Three Exam Domains Explained
The exam blueprint is organized into three domains, and understanding their weight is the single most important planning input for your study time. A full breakdown of each lives in CSFA Exam Domains 2026: Complete Guide to All 3 Content Areas, but here's the summary:
Domain 1: Perioperative Care (55%)
This is by far the largest domain, and it's driven heavily by Intraoperative Procedures - meaning the bulk of your exam is built around what you actually do during a case: tissue handling, hemostasis, exposure, wound closure, and surgeon support across specialties.
- Intraoperative technique across multiple surgical specialties
- Preoperative assessment and positioning considerations
- Postoperative wound management and closure decisions
Domain 2: Ancillary Duties (14%)
The smallest domain but still a meaningful scoring opportunity. It covers the supporting responsibilities that surround the surgical episode rather than the operative moment itself.
- Documentation and communication responsibilities
- Equipment and supply coordination duties
- Professional and legal scope-of-practice considerations
Domain 3: Basic Science (31%)
A substantial chunk of the exam rests on foundational science - anatomy, physiology, microbiology, and pharmacology as they apply to surgical assisting, not abstract classroom recall.
- Applied anatomy and physiology relevant to common procedures
- Wound healing physiology and infection control principles
- Pharmacology relevant to hemostasis, anesthesia support, and surgical site care
Because Domain 1 alone accounts for over half the exam, candidates who under-study Intraoperative Procedures content tend to run into trouble regardless of how strong their science background is. For domain-specific study plans, see 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.
Fees, Registration, and Renewal Mechanics
Cost is often the first practical question candidates ask, and it's worth understanding the full fee structure before you register - not just the initial exam fee. A complete breakdown is available in CSFA Certification Cost 2026: Complete Pricing Breakdown, but here's the core structure:
| Item | AST Member | Non-Member |
|---|---|---|
| Initial Exam Fee | $240 | $350 |
| Renewal by CE Credits | $45 | $45 |
| Renewal by Examination | $450 | $550 |
AST membership status has a direct, measurable effect on what you pay both at initial certification and if you ever choose to recertify by examination instead of continuing education. Most CSFAs maintain their credential through the CE pathway rather than re-testing, since submitting AST-approved CE credits alongside a renewal application to NBSTSA is significantly cheaper than sitting for the exam again.
Key Takeaway
If cost is a factor, joining AST before you register for the initial exam saves $110 upfront and cuts the recertification-by-exam fee by $100 down the road.
How Difficult Is the CSFA Exam?
The 2025 national first-take pass rate was 62% - a number that tells you this is not an exam you can pass on general surgical experience alone. Passing requires 99 of 150 scored questions correct, which is a 66% threshold, but the difficulty comes less from the cutoff itself and more from the breadth of Domain 1's Intraoperative Procedures content across multiple surgical specialties.
For a deeper analysis of what makes candidates struggle and how the exam compares to related certifications, see How Hard Is the CSFA Exam? Complete Difficulty Guide 2026 and CSFA Pass Rate 2026: What the Data Shows.
Building a Domain-Weighted Prep Schedule
Rather than studying all three domains equally, allocate time in proportion to exam weight - roughly half your study hours on Perioperative Care, just under a third on Basic Science, and a smaller block on Ancillary Duties. A technique like spaced repetition works well here specifically because Domain 1 content spans so many specialties: reviewing intraoperative scenarios across cardiovascular, orthopedic, and general surgery cases in short repeated intervals helps retention far more than one long cram session.
Perioperative Care Deep Dive
- Work through intraoperative technique by specialty
- Drill positioning, exposure, and hemostasis scenarios
Basic Science Application
- Tie anatomy and physiology directly to procedures already reviewed
- Review pharmacology relevant to intraoperative decision-making
Ancillary Duties and Full Review
- Cover documentation, equipment, and scope-of-practice topics
- Run full-length timed practice sets under 4-hour conditions
For a complete week-by-week plan built around this weighting, see CSFA Study Guide 2026: How to Pass on Your First Attempt. And to get a feel for actual question style before test day, review Best CSFA Practice Questions 2026: What to Expect on the Exam or work through timed sets on our CSFA practice test platform.
Who Hires CSFAs
CSFA-credentialed professionals typically work in hospital operating rooms, ambulatory surgery centers, and specialty surgical practices where a dedicated first assistant reduces reliance on residents or additional surgeons. Employers value the credential because it signals verified competency across the same breadth the exam tests - multi-specialty intraoperative skill, not just one procedure type.
If you're evaluating job prospects or compensation before committing to the exam, CSFA Jobs and CSFA Salary Guide 2026: Complete Earnings Analysis cover the employment landscape in detail. For those still building the educational foundation required for eligibility, CSFA Training outlines what CAAHEP-accredited programs typically involve.
Frequently Asked Questions
There are 175 total questions, but only 150 are scored. The remaining 25 are unscored pretest questions mixed in randomly, so you won't know which ones don't count.
You need 99 correct answers out of the 150 scored questions. Unscored pretest questions don't affect this calculation.
No. The only eligibility pathway is graduation from a CAAHEP-accredited Surgical First Assistant program. There is no experience-based alternative route.
Perioperative Care, which makes up 55% of the exam and is driven largely by Intraoperative Procedures content across multiple surgical specialties. It deserves roughly half your total study time.
You can renew by submitting AST-approved continuing education credits along with a renewal application to NBSTSA for $45, or recertify by taking the exam again for $450 (AST members) or $550 (non-members).
Understanding the CSFA exam's exact structure - its domain weighting, its scoring threshold, and its fee mechanics - is the foundation for any serious study plan. From here, the next step is digging into domain-specific content and running realistic practice questions to see where your gaps actually are.