- What the RNAS-C Credential Actually Is
- Who Issues It and How the Exam Is Delivered
- Eligibility: The 120-Hour Gate and Other Requirements
- The Five Examination Content Sections
- Fees, Scheduling, and Retake Mechanics
- Sequencing Your Preparation Around the Weights
- Keeping the Credential: The Three-Year Cycle
- Where the Credential Fits in Your Career
- Frequently Asked Questions
- RNAS-C stands for Registered Nurse Assistant at Surgery - Certified, issued through the National Assistant at Surgery Certification (NASC).
- The exam has 150 multiple-choice questions, a three-hour limit, and a 70% passing score.
- Applicants need 120 documented intraoperative first-assisting hours from the preceding two years; classroom and seminar hours do not count.
- Four domains each carry 22%; Pre- and Postoperative Considerations carries 12%.
What the RNAS-C Credential Actually Is
RNAS-C is the credential for a Registered Nurse Assistant at Surgery - Certified: a registered nurse who has documented, hands-on experience as a surgical first assistant and has passed a standardized certification examination. It is a surgical first-assisting credential. It is not NCLEX-RN, it is not initial RN licensure, and it does not replace the RN license that every applicant must already hold.
If you are still orienting yourself on terminology, our explainers on what RNAS-C is and what the acronym stands for cover the basics. This article focuses on the practical path: who qualifies, what the exam tests, what it costs, and how to keep the credential once you earn it.
Who Issues It and How the Exam Is Delivered
The certification is offered by the National Assistant at Surgery Certification (NASC). The examination is delivered as a live, remote-proctored test through Prolydian, which means you sit for it from an approved location with a proctor monitoring the session rather than at a traditional testing center.
The format is straightforward:
- 150 multiple-choice questions, each with four answer choices and exactly one correct answer
- Three hours to complete the exam
- One optional 15-minute break
- No established extension of the examination allowance
- 70% passing score, which is a fixed score threshold rather than a published pass-rate statistic
Three hours for 150 questions works out to roughly 72 seconds per item if you use the full window, which is a comfortable pace for single-best-answer questions but not a generous one if you tend to re-read stems. For a closer look at how that pacing translates into difficulty, see How Hard Is the RNAS-C Exam?, and for the score itself, see RNAS-C Passing Score.
Eligibility: The 120-Hour Gate and Other Requirements
The eligibility rules are where most candidates should spend their first week of planning, because the experience requirement cannot be crammed. A full treatment lives in RNAS-C Requirements; the essentials are below.
| Requirement | What It Means |
|---|---|
| RN license | Current, unrestricted RN license in the country of practice |
| Life support | Current ACLS, BLS, or CPR certification |
| Formal education | Acceptable formal RNFA-program completion |
| Experience | 120 documented intraoperative first-assisting hours in the preceding two years |
| Nursing credential | Non-APRN applicants need a current CNOR; APRNs use accredited APRN certification |
| Recommendations | One from a surgeon and one from an operating-room supervisor or manager, required on both routes |
| Degree | A bachelor's degree is not required |
What counts toward the 120 hours
Eligible internship or practicum hours count toward the 120. Classroom and seminar hours do not. The hours must be intraoperative first-assisting time, documented, and fall within the two years preceding your application. If you are completing an RNFA program, confirm early that your practicum logs capture the detail needed for documentation, rather than reconstructing it from memory later.
The Five Examination Content Sections
The current issuer-linked study guide lists five weighted examination content sections. These are the exam's own headings, not an editorial curriculum, and they are worth treating as the authoritative map of what you will be tested on. For a deeper walkthrough, see RNAS-C Exam Domains: Complete Guide to All 5 Content Areas.
| 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% |
Applied to a 150-question exam, a 22% weighting suggests roughly a third of a hundred questions per large domain and fewer for the smaller one, though the issuer's guide supplies weights rather than a guaranteed question count per section, so treat any exact per-domain tally as an estimate.
Domain 1: Surgical Patient Care (22%)
This section concerns the patient as a surgical patient: the care considerations that surround and support the operation itself.
- Think from the first assistant's vantage point, not the circulating nurse's or the surgeon's
- Expect scenario-style stems where the best answer protects patient safety first
Domain 2: Surgical Skill (22%)
The study guide PDF uses the heading "Surgical Skill," while the current HTML page uses "Surgical Skills." This site preserves the formal PDF wording.
- Covers the technical competencies of first-assisting at the operative field
- Your logged intraoperative hours are the best preparation here; use study time to fill gaps in procedures you have seen less often
Domain 3: Anatomy & Physiology (22%)
Equal in weight to the skills and care sections, which surprises candidates who assume the exam is purely procedural.
- Anatomical relationships matter because first assistants work near structures they must recognize and protect
- Pair anatomy review with the procedures you assist on so the two reinforce each other
Domain 4: Procedure Considerations (22%)
Procedure-specific knowledge: what is distinctive about particular operations and how that shapes the assistant's role.
- Prioritize the procedure families in your own case mix, then broaden to those you see rarely
Domain 5: Pre- and Postoperative Considerations (12%)
The smallest section at 12%. The guide verifies this heading and its weight but supplies no detailed objective list for it, and we do not invent subtopics beyond what the issuer published.
- Smaller weight does not mean skippable; at 12% it still represents a meaningful block of questions
Fees, Scheduling, and Retake Mechanics
The money and the calendar are both part of the exam. Full pricing detail is in RNAS-C Certification Cost and scheduling detail in RNAS-C Exam Dates; the core mechanics are here.
| Item | Detail |
|---|---|
| Initial examination fee | USD 425 |
| Retake fee | USD 195 |
| Testing window | Take the exam within four months of applying |
| Rescheduling | At least four hours before the appointment |
| Results | Within 72 hours |
| First retake | 45 to 90 days after the original examination |
| Attempt limit | Maximum three attempts in 12 months |
The retake structure also shapes strategy. With a mandatory 45-to-90-day gap before the first retake and a cap of three attempts in 12 months, a failed attempt costs you time as well as the USD 195. That is a good reason to take at least one full-length timed practice session before your real appointment. You can find realistic question practice on the main practice test site. For context on how candidates fare overall, read RNAS-C Pass Rate: What the Data Shows, which is careful to separate the 70% passing score from any pass-rate statistic.
Sequencing Your Preparation Around the Weights
Rather than a generic study schedule, let the exam's own structure drive your order of attack. The four equal 22% domains deserve roughly equal attention, and the 12% domain gets a lighter but real pass. A sample sequence that follows the content sections:
Anatomy & Physiology
- Start here because anatomy underpins every other section
- Review structures relevant to the procedures you assist on most
Procedure Considerations
- Build procedure-by-procedure notes on the role of the first assistant
- Link each procedure back to the anatomy from Week 1
Surgical Skill and Surgical Patient Care
- Work through technique and patient-care scenarios
- Practice choosing the safest correct answer under time pressure
Pre- and Postoperative Considerations plus full simulation
- Cover the 12% domain, then take a timed 150-question run
- Use results to target weak domains before your appointment
For a fuller plan, see the RNAS-C Study Guide, and for a compact review sheet near exam day, the RNAS-C Cheat Sheet. If you want structured preparation resources, our overview of RNAS-C training covers the options.
Keeping the Credential: The Three-Year Cycle
The certification lasts three years. NASC updated its recertification requirements on August 6, 2025, so make sure any recertification guidance you rely on reflects that revision.
The baseline requirements
- Maintain your RN licensure and BLS certification
- Document 300 RNFA practice hours, including 250 intraoperative hours
- Then choose one of two paths: earn 240 points and pay USD 275, or pass the recertification examination and pay USD 325
Understanding the points path
The points pathway has a quirk worth understanding before you start collecting credits. The 300 required practice hours contribute 30 of the 240 points. One CE or CME hour earns two points, so points are not interchangeable with CE hours: a certain number of CE hours does not equal the same number of points. Do the arithmetic against the official points schedule rather than assuming one-for-one conversion.
Where the Credential Fits in Your Career
RNAS-C is relevant to registered nurses who work as surgical first assistants, typically in operating-room settings alongside surgeons. The requirement for a recommendation from an OR supervisor or manager, plus a surgeon, tells you who the credential is built for: nurses already embedded in operative teams. For what the work looks like in practice and who is hiring, see RNAS-C Jobs. For compensation, we deliberately avoid quoting unsourced figures here; the qualitative picture and available data are discussed in the RNAS-C Salary Guide, and the broader question of whether the investment pays off is examined in Is the RNAS-C Certification Worth It?.
Key Takeaway
Treat the credential as a two-part project: first accumulate and document the 120 intraoperative hours and gather your two recommendations, then apply and use the four-month window for focused practice against the five weighted domains. Starting the documentation late is the most common way to stall an otherwise ready candidate.
If you need a refresher on how the credential is named and described, our pages on RNAS-C meaning and what RNAS-C certification is are good starting points, and the practice test hub lets you check your readiness against exam-style questions.
Frequently Asked Questions
The exam has 150 multiple-choice questions with four choices each and one correct answer. You have three hours, with one optional 15-minute break. There is no established extension of the examination allowance.
The passing score is 70%. This is a score threshold, not a pass-rate statistic, so it tells you what you must achieve rather than how many candidates succeed.
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 is USD 425 and a retake is USD 195. The first retake must occur 45 to 90 days after the original attempt, and you are limited to three attempts in 12 months.
Maintain your RN license and BLS, document 300 RNFA practice hours including 250 intraoperative hours, and then either earn 240 points with a USD 275 fee or pass the recertification examination for USD 325. Requirements were updated August 6, 2025, and applicants who already began recertification should contact NASC about the transition from the legacy application.