- What This Exam Actually Measures
- Confirm Eligibility Before You Open a Book
- Format, Fees, and Logistics You Should Know Cold
- The Five Content Sections, Domain by Domain
- Sequencing Your Preparation Around the Domains
- Working Through Four-Choice Surgical Questions
- Retake Rules and Why They Raise the Stakes
- After You Pass: Three Years and Recertification
- Frequently Asked Questions
- The RNAS-C exam has 150 multiple-choice questions, four choices each, in a three-hour live remote-proctored session.
- A passing score is 70%, and four of five content sections tie at 22% each.
- Applicants need 120 documented intraoperative first-assisting hours from the preceding two years; classroom and seminar hours do not count.
- Retakes are limited to three attempts in 12 months, with the first retake 45-90 days after the original exam.
What This Exam Actually Measures
The Registered Nurse Assistant at Surgery - Certified (RNAS-C) credential is awarded through the National Assistant at Surgery Certification (NASC). It is a surgical first-assisting certification for registered nurses. It is not NCLEX-RN, and it does not test initial RN licensure content. If you are building a plan from general nursing review books, you will spend much of your time on material the exam does not target.
That distinction shapes everything about preparation. Candidates sitting for this exam are already licensed, already working in or around the operating room, and already carrying documented first-assisting experience. The exam asks whether you can apply that experience consistently: knowing the anatomy beneath the incision, anticipating what the surgeon needs, handling tissue and instruments correctly, and managing the patient before and after the procedure.
If you are still orienting yourself to the credential, the articles on what RNAS-C certification is and what RNAS-C stands for cover the basics. This guide assumes you have decided to pursue it and want a plan.
Confirm Eligibility Before You Open a Book
The most common first-attempt failure is not a failed exam. It is an application that stalls because a requirement was misread. Settle eligibility before you invest weeks in content review.
The Requirements in Plain Terms
- A 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.
- Recommendations from both a surgeon and an operating-room supervisor or manager.
Non-APRN applicants must also hold a current CNOR. APRNs use their accredited APRN certification instead. A bachelor's degree is not required.
What Counts Toward the 120 Hours
Eligible internship or practicum hours count toward the 120-hour requirement. Classroom and seminar hours do not. If your RNFA program included a clinical practicum, confirm with your program how those hours are documented and whether they fall inside the two-year window. Start gathering signatures and logs early, because the recommendation letters depend on other people's schedules.
For a fuller walkthrough, see RNAS-C Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Format, Fees, and Logistics You Should Know Cold
Knowing the mechanics removes avoidable stress on exam day. The test is delivered as a live remote-proctored examination through Prolydian, so you take it from your own location under supervision rather than at a testing center.
| Item | Detail |
|---|---|
| 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% |
| Initial exam fee | USD 425 |
| Retake fee | USD 195 |
| Results | Within 72 hours |
| Testing deadline | Within four months of application |
| Rescheduling | At least four hours before the appointment |
Pacing Math
Three hours for 150 questions works out to roughly 72 seconds per question if you use no break time and leave nothing for review. That is generous for recall questions and tight for multi-step clinical scenarios. Practice reading a scenario stem, identifying what is actually being asked, and committing to an answer in about a minute. The exam has no established extension of the examination allowance, so plan to work within the three hours.
Mind the Four-Month Window
You must test within four months of applying. That means your study plan should be well underway before you submit, not started afterward. Submitting an application and then hoping to find time later is how candidates end up rescheduling or running out the window. For deadlines and scheduling details, see RNAS-C Exam Dates 2026: Testing Windows, Deadlines & Scheduling. A full fee breakdown is in RNAS-C Certification Cost 2026.
The Five Content Sections, Domain by Domain
The exam draws from five weighted content sections. Four are tied at 22% each, and the fifth carries 12%. That near-even split matters: there is no single section you can neglect and still expect to clear 70% comfortably. A candidate who is excellent at surgical technique but shaky on anatomy has no room to hide.
Domain 1: Surgical Patient Care (22%)
This section covers the care of the patient as a person under surgical conditions, not just as the site of a procedure.
- Think about what the assistant is responsible for while the patient is on the table: positioning, protection, and recognizing when something changes.
- Expect scenarios that ask what you do first, or what you notice first, when a patient's status shifts intraoperatively.
- Review the safety responsibilities that sit with the first assistant versus other members of the team.
Domain 2: Surgical Skill (22%)
The official PDF uses "Surgical Skill" as the heading, and this guide preserves that wording. This is the hands-on competence section.
- Tissue handling, exposure, retraction, hemostasis, and closure are the kind of skill areas a first assistant performs under the surgeon's direction.
- Questions tend to test judgment about technique: why one approach is chosen, and what goes wrong with another.
- Draw on your own first-assisting hours here, but verify your habits against standard references rather than local custom alone.
Domain 3: Anatomy & Physiology (22%)
Anatomy is where operating-room experience can mislead you. You may know a structure by how it looks in a surgical field and still struggle with a stem that asks about relationships, blood supply, or function.
- Study regional anatomy the way a surgeon approaches it: layer by layer, with the structures at risk named.
- Pair anatomy with physiology so you can reason about what a given injury or intervention does to the patient.
- Do not assume the anatomy you see most often is the anatomy most heavily tested.
Domain 4: Procedure Considerations (22%)
This section ties the procedure itself to the assistant's role: what the case involves, what the surgeon will need, and where complications can arise.
- Work from procedures you have assisted on, then expand to ones you have not. The exam is not limited to your local case mix.
- For each procedure, be able to describe the sequence, the key structures, and the points of greatest risk.
- Practice anticipating the next step, since that is the core habit of a good first assistant.
Domain 5: Pre- and Postoperative Considerations (12%)
The smallest section by weight, but not one to skip. The official study guide verifies the heading and the 12% weight but does not provide a detailed objective list for this section, so there are no extra subtopics to cite beyond the heading itself.
- Interpret the heading plainly: what happens to the patient before the incision and after the closure.
- Use your clinical experience and standard perioperative references to fill in the detail.
- Because this section is weighted lower, treat it as consolidation work rather than your main study investment.
For a deeper look at how these sections are organized, see RNAS-C Exam Domains 2026: Complete Guide to All 5 Content Areas.
Sequencing Your Preparation Around the Domains
You do not need an elaborate method. You need to match your time to the weighting and to your own gaps. Because four sections carry equal weight, the real question is which of them is weakest for you. Experienced first assistants usually find Surgical Skill and Procedure Considerations familiar, and Anatomy & Physiology the place where gaps hide.
Diagnose and Start Anatomy
- Take a baseline practice set and sort misses by domain.
- Begin Anatomy & Physiology first, since it rewards repetition and is where most candidates have the largest gap.
Procedure Considerations and Surgical Skill
- Walk through procedures sequentially, naming structures and risks at each step.
- Review technique rationale, not just technique.
Surgical Patient Care and Pre-/Postoperative
- Cover patient-care scenarios and the perioperative bookends.
- Revisit the weakest anatomy regions from earlier weeks.
Timed Mixed Practice
- Run full-length sets at the 72-second-per-question pace.
- Spend leftover time on missed topics, weighted toward the 22% sections.
Adjust the length to your situation, remembering the four-month testing window after you apply. If you have been out of the operating room, add time for skill and procedure review. If you have been in a single specialty, add time for procedures outside it.
Working Through Four-Choice Surgical Questions
With four options and one correct answer, many questions come down to eliminating the two clearly wrong choices and then deciding between the remaining two. The best way to improve is to review why the wrong answers are wrong, not just why the right one is right.
Habits That Fit This Exam
- Read the last line of the stem first. Know whether you are being asked what to do first, what is most likely, or what is incorrect.
- Anchor to the assistant's role. The exam is about first-assisting. If a choice describes something that belongs to another team member, treat it with suspicion.
- Do not import local routine. Your hospital's way of doing something may be one acceptable option among several. Answer to the standard, not the habit.
- Flag and move on. With roughly 72 seconds a question, a stalled item costs you others.
Key Takeaway
Every missed practice question should be tagged to one of the five domains. After a few sets, the pattern shows you exactly where to spend your remaining hours. Candidates who track misses by domain stop studying what they already know. Try the practice questions at our main practice test site and log your results by section.
If you want to gauge how demanding the exam is before committing to a timeline, see How Hard Is the RNAS-C Exam?. For a quick reference to keep beside your notes, use the RNAS-C cheat sheet.
Retake Rules and Why They Raise the Stakes
The retake policy is the strongest argument for preparing thoroughly the first time. A first retake can only be taken 45-90 days after your original examination, and you are limited to three attempts in 12 months. A retake costs USD 195, compared with USD 425 for the initial exam, so a miss is not only a delay but a real expense.
That 45-90 day gap is a built-in study period, and it is worth using deliberately. Your score report, combined with your own record of weak domains, tells you where to concentrate. Do not simply repeat the same preparation and hope for a different result.
After You Pass: Three Years and Recertification
The certification runs for three years. Recertification requirements were updated August 6, 2025, so rely on the current requirements rather than older descriptions you may find elsewhere. The current structure requires you to maintain RN licensure and BLS, and to document 300 RNFA practice hours including 250 intraoperative hours. From there you have two paths:
- Earn 240 points and pay a USD 275 fee, or
- Pass the recertification examination for USD 325.
Points are not interchangeable with CE hours. The 300 required practice hours contribute 30 of the 240 points, and one CE/CME hour earns two points. Keep records from day one of your certification cycle rather than reconstructing them in year three.
The issuer's FAQ says the legacy online application remains available through the remainder of 2026 for applicants who already started recertification. NASC directs existing applicants to contact it about the transition rather than assume they can freely choose between old and new rules.
Why This Matters Now
Understanding recertification before you test helps you decide whether the credential fits your career. Cost, career value, and earning potential are covered in Is the RNAS-C Certification Worth It? and RNAS-C Salary Guide 2026. If you are researching where the credential is used, RNAS-C jobs covers the hiring side.
Frequently Asked Questions
The exam has 150 multiple-choice questions, each with four answer choices and one correct answer. You have three hours, with one optional 15-minute break.
The passing score is 70%. That is a score threshold, not a statistic about how many candidates pass. Results are released within 72 hours of testing.
No. Eligible internship or practicum hours count, but classroom and seminar hours do not. The 120 documented intraoperative first-assisting hours must fall within the preceding two years.
The first retake must be scheduled 45-90 days after the original examination. You may make a maximum of three attempts in 12 months, and a retake costs USD 195.
No. The RNAS-C is a surgical first-assisting certification for already-licensed RNs. Its five content sections focus on surgical patient care, surgical skill, anatomy and physiology, procedure considerations, and pre- and postoperative considerations, not initial RN licensure content.