- What RNAS-C Actually Is
- Who Certifies It and How the Exam Is Delivered
- Who Can Sit for the Exam
- Exam Format and Scoring
- The Five Content Sections
- Fees, Scheduling, and Retakes
- Three-Year Certification and Recertification
- What RNAS-C Is Not
- Sequencing Your Preparation Around the Weights
- Frequently Asked Questions
- RNAS-C stands for Registered Nurse Assistant at Surgery - Certified, awarded through the National Assistant at Surgery Certification (NASC).
- The exam has 150 multiple-choice questions, three hours, and a 70% passing score; the initial fee is USD 425.
- Applicants need 120 documented intraoperative first-assisting hours from the preceding two years, plus formal RNFA-program completion.
- Four content sections carry 22% each; Pre- and Postoperative Considerations carries 12%.
What RNAS-C Actually Is
RNAS-C is the credential for registered nurses who work as first assistants in the operating room. The letters stand for Registered Nurse Assistant at Surgery - Certified. It is a certification that verifies a nurse's knowledge of surgical first assisting: the clinical judgment, anatomy, procedural understanding, and hands-on skill required to assist a surgeon directly at the operative field.
If you are searching for a quick definition, the short version is this: RNAS-C is a surgical first-assisting certification for RNs, not a general nursing exam and not an entry-level license. Related explainers on this site approach the same question from different angles, including what RNAS-C stands for and the meaning of the RNAS-C designation. This article covers the whole picture in one place: who issues it, who qualifies, how the exam is built, and what it costs to earn and keep.
Who Certifies It and How the Exam Is Delivered
The certifying body is the National Assistant at Surgery Certification (NASC). The examination is administered as a Prolydian live remote-proctored test, meaning you take it from an approved remote setup while a live proctor monitors the session, rather than driving to a traditional testing center.
That delivery model has practical consequences. You need to plan your testing environment, equipment, and identification ahead of time, and you should treat the appointment time as firm. NASC's rescheduling rule requires changes at least four hours before your scheduled appointment, so last-minute shuffling is not an option.
Who Can Sit for the Exam
RNAS-C eligibility is deliberately experience-heavy. NASC is certifying people who already function in the first-assistant role, so the application asks for documentation, not just a transcript. The core requirements are:
- Current, unrestricted RN license in the country where you practice.
- Current ACLS, BLS, or CPR certification.
- Acceptable formal RNFA-program completion.
- 120 documented intraoperative first-assisting hours within the preceding two years.
- Surgeon and OR leadership recommendations: one from a surgeon and one from an operating-room supervisor or manager.
Two details trip up applicants. First, eligible internship or practicum hours count toward the 120, but classroom and seminar hours do not. Second, the credential routes differ by nursing role: non-APRN applicants need a current CNOR, while APRNs use their accredited APRN certification instead. A bachelor's degree is not required.
| Applicant Type | Certification Requirement | Recommendations Required |
|---|---|---|
| Non-APRN registered nurse | Current CNOR | Surgeon and OR supervisor/manager |
| APRN | Accredited APRN certification | Surgeon and OR supervisor/manager |
For the full checklist and documentation pointers, see our dedicated guide to RNAS-C requirements and how to qualify.
Exam Format and Scoring
The exam is a single sitting with a straightforward structure:
- 150 multiple-choice questions, each with four answer choices and one correct answer.
- Three hours of testing time.
- One optional 15-minute break. There is no established extension of the examination allowance beyond that.
- Passing score of 70%. This is a cut score for the exam, not a pass-rate statistic about how many candidates succeed.
Three hours for 150 questions works out to roughly a minute and twelve seconds per question if you used every minute with no break, so pacing matters. Because every item is four-choice single-answer, strategy comes down to reading the stem carefully, eliminating clearly wrong options, and committing. Our guide to the RNAS-C passing score explains how to interpret the 70% threshold, and the pass rate article explains why published success figures should be treated carefully.
The Five Content Sections
NASC publishes five weighted content sections in the RNAS-C Exam Study Guide. These are examination content headings, so treat them as a map of what is tested rather than a ready-made curriculum. The first four sections tie for the largest allocation at 22% each, and the fifth carries 12%.
| Domain | Name | Weight |
|---|---|---|
| 1 | Surgical Patient Care | 22% |
| 2 | Surgical Skill | 22% |
| 3 | Anatomy & Physiology | 22% |
| 4 | Procedure Considerations | 22% |
| 5 | Pre- and Postoperative Considerations | 12% |
Domain 1: Surgical Patient Care (22%)
This section centers on the patient while they are in the surgical environment. Candidates should be ready to reason about patient safety and care decisions as they relate to the assistant's role at the table.
Domain 2: Surgical Skill (22%)
This is the hands-on competency section, and the study guide PDF uses the formal wording "Surgical Skill" (the current web page says "Surgical Skills"). Expect questions on how an assistant performs and applies technique during an operation.
Domain 3: Anatomy & Physiology (22%)
A first assistant must know what lies beneath the incision. This section tests the structural and functional knowledge that makes safe exposure, retraction, and intraoperative decision-making possible.
Domain 4: Procedure Considerations (22%)
This section addresses what a candidate must understand about the operations themselves: how procedures unfold and what the assistant needs to anticipate at each stage.
Domain 5: Pre- and Postoperative Considerations (12%)
The smallest section, but not a throwaway. It covers the care continuum on either side of the operating room. Note that the study guide verifies this heading and its weight but does not supply a detailed objective list for it, so avoid relying on any source that claims to enumerate its subtopics in official detail.
Because four sections are weighted equally, a lopsided preparation plan is risky. A candidate who is brilliant at anatomy but weak on procedure considerations is giving up a full 22% block. Our complete guide to all five RNAS-C content areas goes deeper on each heading, and the RNAS-C cheat sheet condenses the must-know facts into a single review page.
Fees, Scheduling, and Retakes
The money and timing rules are specific, and missing one can cost you a fee or a window.
| Item | Detail |
|---|---|
| Initial examination fee | USD 425 |
| Retake fee | USD 195 |
| Testing window after application | Test within four months of applying |
| Rescheduling | At least four hours before the appointment |
| Results | Within 72 hours |
| First retake timing | 45 to 90 days after the original exam |
| Attempt limit | Maximum three attempts in 12 months |
The four-month testing window is the one that catches people. Once you apply, the clock starts, so submit your application only when your preparation is close enough that you can realistically test inside that window. Likewise, the 45-to-90-day retake spacing means a failed attempt forces a real pause, and the three-attempts-in-12-months cap means you cannot brute-force the exam. For the full cost picture, including recertification, see the RNAS-C certification cost breakdown, and for scheduling logistics see RNAS-C exam dates and deadlines.
Key Takeaway
Treat application submission as the start of a four-month countdown. Build your readiness first, apply second, and keep the four-hour rescheduling cutoff in mind when you book your appointment.
Three-Year Certification and Recertification
RNAS-C certification runs for three years. Keeping it active requires meeting recertification requirements that NASC updated on August 6, 2025. Under the updated rules, you must:
- Maintain your RN licensure and BLS certification.
- Document 300 RNFA practice hours, including 250 intraoperative hours.
- Choose one of two paths: earn 240 points and pay a USD 275 fee, or pass the recertification examination for USD 325.
The points path has a quirk worth understanding. The 300 required practice hours contribute 30 of the 240 points, and one CE or CME hour earns two points. That means points and CE hours are not interchangeable: you cannot simply count 240 hours of continuing education and call it done. Do the arithmetic on your own activity before choosing a path.
What RNAS-C Is Not
It helps to be precise about scope, because the credential is sometimes confused with unrelated exams. RNAS-C is a surgical first-assisting certification. It is not the NCLEX-RN and it is not initial RN licensure. You must already hold your RN license to apply, and the exam assumes you are already working in or trained for the first-assistant role.
That also shapes who benefits from it. The people drawn to this certification are perioperative RNs and APRNs who assist surgeons directly, and the employers that care about it are the hospitals, surgical practices, and surgeon-led teams that rely on a qualified first assistant. For the career side of the question, see our analysis of whether the RNAS-C certification is worth it, plus the RNAS-C salary guide and RNAS-C jobs overview. Pay and demand vary by employer, region, and role, so use those pages as a starting framework rather than a promise.
Sequencing Your Preparation Around the Weights
Since four domains are tied at 22%, the smartest scheduling move is to reserve your heaviest study blocks for the content that is hardest for you, not the content that feels most comfortable. A candidate coming from a busy OR floor may already be strong on Surgical Patient Care and Surgical Skill, but rusty on Anatomy & Physiology detail. Someone from a classroom-heavy background may have the reverse problem.
Anatomy & Physiology plus Procedure Considerations
- Start here because these two sections feed each other: you cannot anticipate a procedure without knowing the anatomy involved.
- Build a list of the operations you personally have assisted and compare it against what the exam may cover.
Surgical Skill plus Surgical Patient Care
- Review technique and patient-care reasoning in the context of intraoperative scenarios.
- Practice with four-choice questions to get comfortable eliminating near-miss distractors.
Pre- and Postoperative Considerations, then full review
- Cover the 12% section last, since it is the smallest, then take timed 150-question practice sets to rehearse the three-hour pacing.
For a deeper walkthrough, our RNAS-C study guide lays out a full plan, and how hard the RNAS-C exam is helps you calibrate how much runway you need. When you are ready to test yourself, work through realistic questions on the main practice test site and use its timed sets to rehearse the exam's pacing.
Frequently Asked Questions
RNAS-C stands for Registered Nurse Assistant at Surgery - Certified. It is a surgical first-assisting certification awarded through the National Assistant at Surgery Certification (NASC) to registered nurses who meet its experience and examination requirements.
The exam has 150 multiple-choice questions, each with four choices and one correct answer, delivered over three hours with one optional 15-minute break. The passing score is 70%.
No. A bachelor's degree is not required. You do need a current unrestricted RN license, acceptable formal RNFA-program completion, 120 documented intraoperative first-assisting hours in the preceding two years, and recommendations from a surgeon and an operating-room supervisor or manager. Non-APRN applicants also need a current CNOR.
The initial examination costs USD 425 and a retake costs USD 195. Your first retake must come 45 to 90 days after the original exam, and you are limited to three attempts in 12 months. Results arrive within 72 hours.
Certification lasts three years. To recertify you must maintain RN licensure and BLS, document 300 RNFA practice hours including 250 intraoperative hours, and either earn 240 points with a USD 275 fee or pass the recertification exam for USD 325. Requirements were updated August 6, 2025.
RNAS-C is a focused, experience-driven credential: you earn eligibility through documented operating-room hours, prove knowledge through a 150-question exam weighted across five content sections, and maintain it through a three-year recertification cycle. For a broader overview of the credential, you can also browse our pages on RNAS-C certification and RNAS-C training.