- What Is A CSFA, Exactly?
- Who Hires Certified Surgical First Assistants
- The NBSTSA, PSI, and How the Credential Works
- Eligibility: The CAAHEP Program Requirement
- Exam Format, Timing, and Fees
- The Three CSFA Content Domains
- What a CSFA Actually Does in the OR
- Mapping Your Prep to the Domain Weights
- Keeping the Credential Active
- CSFA vs. CST: How They Differ
- Frequently Asked Questions
- A CSFA is a NBSTSA-credentialed surgical first assistant who works directly at the operative field under a surgeon's direction.
- The exam has 175 questions (150 scored, 25 pretest) with a 4-hour limit and a passing score of 99.
- Perioperative Care makes up 55% of the exam, so intraoperative procedures deserve the most study time.
- Eligibility requires graduating from a CAAHEP-accredited Surgical First Assistant program before you can sit for the test.
What Is A CSFA, Exactly?
CSFA stands for Certified Surgical First Assistant, a credential awarded by the National Board of Surgical Technology and Surgical Assisting (NBSTSA) to practitioners who demonstrate mastery of intraoperative assisting skills. Unlike a surgical technologist who primarily manages the sterile field from the instrument table, a CSFA works shoulder-to-shoulder with the surgeon, handling tissue, providing exposure, controlling bleeding, and closing incisions under direct supervision.
The title is earned, not assumed. Candidates must pass a standardized computer-based exam administered through PSI testing centers before they can legally use the CSFA designation. For a broader breakdown of what the letters signify and how the credential fits into the surgical career ladder, see CSFA Meaning and What Does CSFA Stand For?.
Who Hires Certified Surgical First Assistants
CSFAs work in hospitals, ambulatory surgery centers, orthopedic and cardiovascular practices, and large surgical groups that perform high volumes of complex cases. Because the role requires direct patient contact at the sterile field, employers typically look for candidates who already hold surgical technology experience or have completed a CAAHEP-accredited assisting program before adding the CSFA credential.
Specialties that frequently employ CSFAs include general surgery, orthopedics, neurosurgery, cardiothoracic surgery, and plastic and reconstructive surgery. If you're evaluating career paths and compensation expectations tied to this credential, the CSFA Salary Guide 2026: Complete Earnings Analysis and CSFA Jobs resources break down where demand is strongest.
The NBSTSA, PSI, and How the Credential Works
NBSTSA develops and maintains the CSFA exam content, while PSI administers the actual test at approved testing centers nationwide. This separation matters practically: NBSTSA sets the blueprint, eligibility rules, and passing standard, but your test-day logistics-scheduling, ID verification, testing room rules-are governed by PSI's policies.
On exam day, expect a strict testing environment: no textbooks, notes, personal electronics, or personal items are allowed in the testing room. Scratch paper is provided by the testing center and must be returned before you leave. These rules mirror other high-stakes healthcare certification exams, so if you've sat for a similar test before, the environment will feel familiar.
Key Takeaway
Because NBSTSA and PSI operate separately, always confirm testing center rules directly with PSI before your appointment-policies on breaks, ID requirements, and allowed items are enforced at the testing center level.
Eligibility: The CAAHEP Program Requirement
You cannot sit for the CSFA exam without first graduating from a CAAHEP-accredited Surgical First Assistant program. This is a hard prerequisite, not a suggestion-NBSTSA verifies program completion before issuing exam authorization. There is no alternate pathway through years of experience alone; formal accredited education is required.
If you're still researching programs or wondering how classroom and clinical training map onto exam content, CSFA Training covers the educational side, while CSFA Certification explains how training connects to the credentialing process overall.
Exam Format, Timing, and Fees
The CSFA exam consists of 175 total multiple-choice questions, of which 150 are scored and 25 are unscored pretest items used to evaluate future exam questions. You won't know which items are pretest and which count, so every question deserves full attention. Candidates have 4 hours to complete the exam, and it is delivered entirely on computer at a PSI testing center.
To pass, you need 99 correct answers out of the 150 scored questions. The 2025 national first-attempt pass rate was 62%, which tells you the exam is passable with solid preparation but not something to walk into unprepared. For a deeper statistical breakdown, read CSFA Pass Rate 2026: What the Data Shows.
| Exam Detail | Specification |
|---|---|
| Total Questions | 175 (150 scored, 25 pretest) |
| Time Limit | 4 hours |
| Passing Score | 99 correct scored questions |
| Format | Computer-based multiple choice |
| Fee (AST Member) | $240 |
| Fee (Non-Member) | $350 |
| Renewal by CE | $45 |
| Renewal by Exam | $450 (AST member) / $550 (non-member) |
Membership with AST significantly lowers both your initial testing fee and your recertification-by-exam fee, which is worth factoring into your long-term budgeting. A full cost comparison, including hidden expenses like study materials and program tuition, is available in CSFA Certification Cost 2026: Complete Pricing Breakdown.
The Three CSFA Content Domains
The CSFA exam blueprint is organized into three domains, and the weighting is heavily skewed toward one area. Understanding this distribution should directly shape how you allocate study hours.
Domain 1: Perioperative Care (55%)
This is by far the largest domain, driven largely by Intraoperative Procedures content-tissue handling, exposure techniques, hemostasis, wound closure, and surgeon-assistant coordination during live cases.
- Preoperative patient assessment and positioning considerations
- Intraoperative technique: retraction, suturing, tissue dissection
- Postoperative wound management and complication recognition
Domain 2: Ancillary Duties (14%)
The smallest domain but still tested meaningfully. It covers administrative, documentation, and supportive responsibilities that surround the surgical episode.
- Documentation and legal/regulatory responsibilities
- Equipment and supply coordination
- Professional communication within the surgical team
Domain 3: Basic Science (31%)
A substantial secondary domain covering the anatomical, physiological, and microbiological foundations that inform every intraoperative decision.
- Surgical anatomy across body systems
- Pathophysiology relevant to common procedures
- Microbiology, wound healing, and infection control principles
Because Perioperative Care alone accounts for more than half the exam, candidates who under-prepare this domain put their entire pass at risk-even with strong Basic Science knowledge. For a full walkthrough of every subtopic within each domain, see CSFA Exam Domains 2026: Complete Guide to All 3 Content Areas, or go deeper on each individually via CSFA Domain 1: Perioperative Care (55%), CSFA Domain 2: Ancillary Duties (14%), and CSFA Domain 3: Basic Science (31%).
What a CSFA Actually Does in the OR
On a typical case day, a CSFA's responsibilities extend well beyond the scrub table. Duties often include positioning the patient, prepping and draping the surgical site, providing retraction and exposure throughout the procedure, controlling bleeding with clamps or cautery, suturing at the surgeon's direction, and assisting with wound closure. Between cases, ancillary responsibilities like documentation and equipment coordination round out the role-directly reflecting the exam's Domain 2 content.
This hands-on scope is what separates the CSFA from adjacent surgical roles and is exactly why the exam leans so heavily on Perioperative Care. The exam isn't testing abstract knowledge; it's testing whether you can make sound intraoperative judgment calls under realistic clinical scenarios.
Mapping Your Prep to the Domain Weights
Generic study techniques only help if they're applied against the right content. Given that Perioperative Care is 55% of the exam and Basic Science is 31%, your study calendar should mirror that imbalance rather than splitting time evenly across all three domains.
Basic Science Foundations
- Review surgical anatomy by body system
- Study wound healing and microbiology basics
- Build a foundation before layering procedural detail on top
Perioperative Care Deep Dive
- Work through intraoperative technique scenarios repeatedly
- Practice positioning, exposure, and hemostasis decision-making
- Spend the majority of total study hours here, matching its 55% weight
Ancillary Duties and Documentation
- Cover regulatory and documentation requirements
- Review team communication and equipment protocols
Full-Length Practice and Review
- Take timed practice sets to simulate the 4-hour format
- Revisit missed questions across all three domains
If you want a structured, exam-specific plan rather than building your own from scratch, the CSFA Study Guide 2026: How to Pass on Your First Attempt lays out a complete week-by-week approach. Pairing that plan with realistic scenario-based questions on our CSFA practice test platform helps you get comfortable with the exam's clinical decision-making style before test day.
Keeping the Credential Active
Earning the CSFA is not a one-time event. Renewal requires either submitting AST-approved continuing education (CE) credits along with a renewal application to NBSTSA, or recertifying by taking the exam again. The CE renewal path carries a $45 fee, while recertification by examination costs $450 for AST members or $550 for non-members.
Most working CSFAs choose the CE path since it's substantially less expensive and doesn't require sitting for another 4-hour exam. However, if your CE credits lapse or you let your certification expire beyond the allowed window, examination may become your only option, making it worth tracking renewal deadlines carefully.
CSFA vs. CST: How They Differ
It's common for candidates to confuse the CSFA with the Certified Surgical Technologist (CST) credential, but the roles and exams differ meaningfully. A CST typically manages the sterile field, instruments, and supplies from outside the direct operative site, while a CSFA works at the surgical site itself, performing tasks like tissue handling and closure under the surgeon's direction.
Because the CSFA role demands more hands-on clinical judgment, its exam content-especially the 55% Perioperative Care domain-is weighted more heavily toward applied intraoperative decision-making than toward instrument and sterile-technique knowledge alone. Many CSFA candidates already hold a CST background, which gives them a head start on sterile technique fundamentals but still requires focused preparation on first-assisting-specific skills.
Key Takeaway
Don't assume CST experience alone prepares you for the CSFA exam-the intraoperative assisting content tested under Perioperative Care requires targeted, exam-specific study.
For readers evaluating whether the investment in time and testing fees is worthwhile compared to other surgical career paths, Is the CSFA Certification Worth It? Complete ROI Analysis 2026 weighs the credential against career outcomes. And if you're still deciding how challenging the exam will feel relative to your background, How Hard Is the CSFA Exam? Complete Difficulty Guide 2026 walks through what makes it demanding beyond the raw pass rate.
Frequently Asked Questions
CSFA stands for Certified Surgical First Assistant, a credential issued by NBSTSA that verifies competency in hands-on intraoperative assisting duties beyond standard surgical technology work.
The exam contains 175 total questions-150 scored and 25 unscored pretest items-delivered in a computer-based format with a 4-hour time limit.
You need 99 correct answers out of the 150 scored questions to pass; the unscored pretest questions do not count toward this total.
Yes. Candidates must graduate from a CAAHEP-accredited Surgical First Assistant program before they are eligible to register for the exam.
Renewal happens either by submitting AST-approved continuing education credits with a renewal application to NBSTSA for a $45 fee, or by recertifying through the full exam for $450 (AST members) or $550 (non-members).