- The Short Answer: What RNAS-C Actually Is
- Who Issues It and How the Exam Is Delivered
- What the Exam Covers: Five Weighted Content Sections
- Who Can Sit for It: Eligibility in Plain Language
- Fees, Scheduling and Retake Rules
- Staying Certified: The Three-Year Cycle
- What RNAS-C Is Not
- Who Uses This Credential and Where It Fits
- Sequencing Your Preparation Around the Weights
- Frequently Asked Questions
- RNAS-C means Registered Nurse Assistant at Surgery - Certified, a surgical first-assisting credential for RNs.
- The exam has 150 multiple-choice questions, three hours, and a 70% passing score.
- Four content sections each carry 22%; Pre- and Postoperative Considerations carries 12%.
- Applicants need 120 documented intraoperative first-assisting hours from the preceding two years.
The Short Answer: What RNAS-C Actually Is
RNAS-C stands for Registered Nurse Assistant at Surgery - Certified. It is a certification for registered nurses who work as first assistants in the operating room. Holders have documented intraoperative first-assisting experience and have passed a standardized, proctored examination that tests the knowledge behind that role.
If you are searching for the meaning of the acronym, the wording matters. The credential is built around the phrase "assistant at surgery." That describes a nurse who works directly at the operative field alongside the surgeon, as opposed to circulating, scrubbing, or providing floor-level perioperative care. For alternate phrasings of the same question, see our explainers on what RNAS-C stands for and the meaning of RNAS-C.
Who Issues It and How the Exam Is Delivered
The credential is administered by the National Assistant at Surgery Certification (NASC). The examination is delivered as a live, remote-proctored test through Prolydian. That means you sit the exam from an approved location under real-time proctor observation, rather than at a walk-in testing center.
Exam format at a glance
| Feature | RNAS-C Detail |
|---|---|
| Issuing body | National Assistant at Surgery Certification (NASC) |
| Delivery | Prolydian live remote-proctored examination |
| Question count | 150 multiple-choice questions |
| Answer format | Four choices, one correct answer |
| Time allowed | Three hours |
| Break | One optional 15-minute break |
| Passing score | 70% |
| Results | Within 72 hours |
Two details are worth noting. First, there is no established extension of the examination allowance, so plan around the three hours as a fixed limit. Second, the 70% figure is the passing score. It is a threshold you must reach, not a statistic describing how many candidates succeed. If you want a clear explanation of that distinction, read our passing score breakdown.
What the Exam Covers: Five Weighted Content Sections
The issuer's current study guide organizes the exam into five official weighted content sections. These are examination content headings, not a preparation curriculum. They tell you how the test is divided, not how you should learn the material. The guide is undated, and the March 2023 date in its hosting directory should not be read as an exam-version year.
| Domain | Weight |
|---|---|
| Domain 1: Surgical Patient Care | 22% |
| Domain 2: Surgical Skill | 22% |
| Domain 3: Anatomy & Physiology | 22% |
| Domain 4: Procedure Considerations | 22% |
| Domain 5: Pre- and Postoperative Considerations | 12% |
The first four sections tie for the largest allocation. The fifth is smaller at 12%, but it is still a full section of the blueprint and should not be skipped. A naming note: the PDF study guide uses "Surgical Skill" while the current HTML page uses "Surgical Skills." This article keeps the formal PDF wording for Domain 2.
Domain 1: Surgical Patient Care (22%)
This section covers the care of the patient as it relates to the surgical encounter, from the perspective of the person assisting at the field.
- Patient safety within the operative environment
- The first assistant's responsibilities toward the patient during surgery
- Recognizing and responding to changes affecting the surgical patient
Domain 2: Surgical Skill (22%)
This section addresses the hands-on competencies of assisting, which is the heart of the credential.
- Technique at the operative field
- Working with the surgeon during the procedure
- Applying skill knowledge to scenario-based questions
Domain 3: Anatomy & Physiology (22%)
First assisting demands that you understand what lies beneath the incision and how tissue and systems respond.
- Surgical anatomy relevant to the procedures you assist
- Physiologic responses connected to the operative experience
Domain 4: Procedure Considerations (22%)
This section connects knowledge of specific operations to what the assistant needs to anticipate and do.
- Understanding the flow and requirements of procedures
- Preparing for what a given operation demands of the assistant
Domain 5: Pre- and Postoperative Considerations (12%)
This section frames the care continuum on either side of the operating room.
- Considerations before the patient reaches surgery
- Considerations after the procedure ends
Who Can Sit for It: Eligibility in Plain Language
Eligibility is where RNAS-C differs most from entry-level credentials. You cannot simply study and register. You must document that you already do the work.
- A current, unrestricted RN license in the country where you practice.
- A current ACLS, BLS, or CPR certification.
- Acceptable formal RNFA-program completion.
- 120 documented intraoperative first-assisting hours in the preceding two years.
On the hours requirement, the type of hour matters. Eligible internship or practicum hours count toward the 120. Classroom and seminar hours do not. The credential is about time spent actually assisting at surgery, so didactic time cannot substitute for it.
Additional requirements by licensure route
- Non-APRN applicants need a current CNOR certification.
- APRNs use their accredited APRN certification instead.
- Both routes require recommendations from a surgeon and an operating-room supervisor or manager.
A bachelor's degree is not required. If you are weighing whether you qualify, our full RNAS-C requirements guide goes deeper on prerequisites and documentation.
Fees, Scheduling and Retake Rules
The mechanics are straightforward but have firm timing rules that candidates sometimes overlook.
| Item | Rule or Amount |
|---|---|
| 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 |
| First retake timing | 45 to 90 days after the original examination |
| Attempt limit | Maximum three attempts in 12 months |
The four-month testing window is the detail most likely to trip someone up. Because your application starts a clock, it makes sense to apply only when your preparation is far enough along to sit within that period. For the full cost picture, including what comes after you pass, see our certification cost breakdown, and for scheduling specifics see exam dates and deadlines.
Key Takeaway
The retake fee is lower than the initial fee, but the retake clock is strict: a first retake cannot happen before 45 days and must fall within 90 days of the original sitting. Treat your first attempt as the one you prepare for fully rather than as a trial run.
Staying Certified: The Three-Year Cycle
RNAS-C is a time-limited credential. Certification lasts three years. The recertification requirements were updated on August 6, 2025, and the key elements are as follows.
- Maintain your RN licensure and BLS certification.
- Document 300 RNFA practice hours, including 250 intraoperative hours.
- Then choose a pathway: earn 240 points and pay a USD 275 fee, or pass the recertification examination for USD 325.
Understanding the points pathway
The points route has a structure worth understanding before you start collecting credits. The required 300 practice hours contribute 30 of the 240 points. One CE or CME hour earns two points. Points and CE hours are therefore not interchangeable: you cannot simply count your CE hours as if each were one point toward the total.
What RNAS-C Is Not
Because this is a niche credential, a few clarifications prevent wasted effort.
- It is not an entry-to-practice exam. The NCLEX-RN licenses nurses; RNAS-C certifies a specialized surgical role on top of licensure.
- It is not a classroom-hours credential. Seminar and classroom time do not satisfy the 120-hour requirement.
- It is not defined by a published pass-rate figure on this site. The 70% number is the passing score, which is a different thing entirely. For what is and is not known on that topic, see our pass rate discussion.
For more variations of the "what is it" question, you can also read what RNAS-C certification is and our overview of the certification.
Who Uses This Credential and Where It Fits
The natural setting for RNAS-C is the operating room. Candidates are nurses already working in or toward the first-assistant role, supported by surgeons and OR leadership who must vouch for them through the required recommendations. Because the recommendation requirement involves both a surgeon and an operating-room supervisor or manager, the credential is tied closely to your existing surgical workplace relationships.
Questions about hiring demand, compensation, and whether the investment pays off depend on your market, facility, and role, so this article does not quote earnings figures. For a qualitative look at those questions, see our resources on RNAS-C jobs, the salary guide, and the return-on-investment analysis.
Sequencing Your Preparation Around the Weights
You do not need an elaborate generic system. You need an order that respects how the exam is built. Four sections carry equal weight, so none can be treated as optional, and the smaller fifth section is best handled as a connective layer. One reasonable sequence is below. Remember that these are exam content headings, so this is an editorial scheduling suggestion rather than an official curriculum.
Anatomy & Physiology first
- It underpins procedure and skill questions, so early mastery makes later sections easier.
- Tie anatomy to the specific operations you assist.
Procedure Considerations and Surgical Skill
- Pair them: each procedure you study should be connected to the assisting techniques it demands.
- Use your own case experience as a memory anchor.
Surgical Patient Care
- Review patient-focused responsibilities now that the procedural base is in place.
Pre- and Postoperative Considerations plus timed practice
- Cover the 12% section, then run mixed 150-question practice under a three-hour limit.
For a fuller plan, read our RNAS-C study guide, and for a quick final review, use the one-page cheat sheet. When you want to test yourself under realistic conditions, our RNAS-C practice test platform lets you work through exam-style questions, and the training resources outline additional preparation options. If you are wondering about difficulty before committing, see how hard the exam really is. You can also start practicing directly at our main practice site.
Key Takeaway
Because the exam gives no extension and allows three hours for 150 questions, practice pacing as seriously as content. Work in full-length timed sets so the one optional 15-minute break and the clock feel familiar on test day.
Frequently Asked Questions
RNAS-C stands for Registered Nurse Assistant at Surgery - Certified. It is a surgical first-assisting certification for registered nurses, administered by National Assistant at Surgery Certification (NASC).
The exam has 150 multiple-choice questions, each with four choices and one correct answer. You have three hours, with one optional 15-minute break. The passing score is 70%.
No. The 120 hours must be documented intraoperative first-assisting hours from the preceding two years. Eligible internship or practicum hours count, but classroom and seminar hours do not.
The initial examination costs USD 425 and a retake costs USD 195. The first retake must occur 45 to 90 days after the original exam, with a maximum of three attempts in 12 months.
Certification lasts three years. Renewal requires maintaining RN licensure and BLS, documenting 300 RNFA practice hours including 250 intraoperative hours, and then either earning 240 points with a USD 275 fee or passing the recertification exam for USD 325.