- The CSC Passing Score Explained
- How the Exam Is Structured
- Domain Weighting and What It Means for Your Score
- The November 2026 Blueprint Change
- Where Candidates Lose Points
- Who This Score Actually Matters To
- Building a Score-Focused Study Plan
- Fees, Registration, and Retake Mechanics
- After You Pass: Renewal Requirements
- Frequently Asked Questions
- The current passing cut is 55 of 75 scored questions on the CSC exam.
- The exam has 90 total multiple-choice questions: 75 scored, 15 unscored, in 2 hours.
- Therapeutic Interventions and Complications together make up 76% of the current blueprint.
- A new blueprint and weighting take effect for exams on or after November 19, 2026.
The CSC Passing Score Explained
If you're preparing for the Cardiac Surgery (Adult) certification exam through AACN Certification Corporation, the number that matters most is simple: you need 55 correct answers out of the 75 scored questions to pass. This is the current cut score under the examination version that launched January 31, 2022, and it remains applicable through November 18, 2026.
That cut score is not a percentage applied loosely across the whole exam - it applies specifically to the scored portion. The other 15 questions on your test are unscored pretest items being evaluated for future exam versions, and they look identical to scored questions on screen. You won't know which is which, so every question deserves full attention.
How the Exam Is Structured
The CSC exam consists of 90 multiple-choice questions, split into 75 scored and 15 unscored items, administered in a 2-hour session. You'll sit for it at a PSI test center or through Live Remote Proctoring, and it is strictly closed-book - no notes, references, or outside materials are permitted during the exam itself.
- Total questions: 90 (75 scored + 15 unscored, unidentified)
- Time allowed: 2 hours
- Format: Multiple-choice, closed-book
- Delivery: PSI test centers or Live Remote Proctoring
Because you can't tell scored questions from unscored ones, pacing matters. With roughly 90 questions in 120 minutes, you have a little over a minute per question on average - tight enough that indecision on early questions can compound. If you want a deeper breakdown of question style and content emphasis, the CSC Exam Domains 2026: Complete Guide to All 4 Content Areas walks through each content area in detail.
Domain Weighting and What It Means for Your Score
The passing score isn't distributed evenly across content. AACN weights the exam by domain, and those weights tell you exactly where your 55 correct answers are most likely to come from - and where a knowledge gap will hurt you most.
Domain 1: Procedures (11%)
Covers surgical approaches, cannulation strategies, and immediate post-procedural expectations for adult cardiac surgery patients.
- Lowest-weighted domain, but still tested consistently across the exam
Domain 2: Complications (33%)
Recognizing and managing the complications specific to the first 48 hours after cardiac surgery - bleeding, arrhythmias, low cardiac output, tamponade, and more.
- Nearly one-third of the exam; demands deep pattern-recognition skill, not memorization
Domain 3: Therapeutic Interventions (43%)
The largest domain by far. Focuses on the interventions - pharmacologic, mechanical, and procedural - used to stabilize postoperative cardiac surgery patients.
- Together with Complications, this domain represents 76% of the current exam plan
Domain 4: Monitoring and Diagnostics (13%)
Interpretation of hemodynamic data, labs, imaging, and continuous monitoring specific to the postoperative cardiac surgery window.
- Smaller share, but frequently tested alongside Complications questions in scenario form
Key Takeaway
Because Therapeutic Interventions and Complications combine for 76% of the exam, your study hours should be weighted the same way - not split evenly across all four domains.
| Domain | Current Weight (through Nov 18, 2026) |
|---|---|
| Procedures | 11% |
| Complications | 33% |
| Therapeutic Interventions | 43% |
| Monitoring and Diagnostics | 13% |
The November 2026 Blueprint Change
If you're testing near the end of 2026, timing matters. The domain structure above applies to exams given through November 18, 2026. Starting November 19, 2026, AACN shifts to a revised weighting scheme:
| Domain | Revised Weight (Nov 19, 2026 onward) |
|---|---|
| Procedures | 9% |
| Complications | 37% |
| Therapeutic Interventions | 43% |
| Monitoring and Diagnostics | 11% |
Notice that Complications gains weight (33% → 37%) while Procedures and Monitoring and Diagnostics both lose a couple of points. Therapeutic Interventions stays the highest-weighted domain either way. If your scheduled exam date falls close to this transition, confirm which blueprint version applies to you before finalizing your review - the CSC Exam Dates 2026: Testing Windows, Deadlines & Scheduling page can help you map your test window against this cutoff.
Where Candidates Lose Points
A 52.20% first-time pass rate in 2025, across 1,184 candidates, tells you the exam rewards precision, not general familiarity. Because unscored and scored items are mixed together, candidates who mentally "check out" on questions that feel unfamiliar risk missing scored points they could have answered correctly with more careful reading.
Common patterns that eat into the 20-question margin between a 55/75 pass and a fail include:
- Confusing generic critical-care knowledge with the CSC's specific first-48-hours-after-cardiac-surgery focus
- Underestimating how heavily Therapeutic Interventions and Complications questions overlap in scenario-based items
- Running out of time in the final third of the 2-hour block because early questions were over-analyzed
- Treating Monitoring and Diagnostics as an afterthought despite its recurring presence in combined-domain scenarios
For a broader look at how these factors combine to make the exam feel harder or easier depending on your background, see How Hard Is the CSC Exam? Complete Difficulty Guide 2026 and the detailed statistics in CSC Pass Rate 2026: What the Data Shows.
Who This Score Actually Matters To
The CSC credential is a nursing subspecialty certification specific to the first 48 hours following adult cardiac surgery - not a general critical-care badge. That specificity is exactly why it carries weight with employers who staff cardiac surgical ICUs, cardiovascular ICUs, and postoperative recovery units where the acuity and intervention pace are highest. Passing at 55/75 signals to hiring managers that you can reliably recognize and respond to the complication patterns and therapeutic interventions unique to this window of care.
If you're weighing whether pursuing this certification fits your career path, Is the CSC Certification Worth It? Complete ROI Analysis 2026 and CSC Jobs cover how the credential is used in hiring and advancement conversations. For a sense of how earning potential connects to certification, see the CSC Salary Guide 2026: Complete Earnings Analysis.
Building a Score-Focused Study Plan
Because Therapeutic Interventions (43%) and Complications (33% or 37%, depending on your test date) dominate the scoring, your study calendar should mirror that imbalance rather than spread evenly across four weeks.
Therapeutic Interventions Deep Dive
- Pharmacologic and mechanical support specific to postoperative cardiac surgery patients
- Practice scenario questions that combine interventions with complication triggers
Complications Pattern Recognition
- Bleeding, tamponade, low cardiac output, dysrhythmias in the first 48 hours
- Cross-reference with Monitoring and Diagnostics signals that precede each complication
Monitoring, Diagnostics, and Procedures
- Hemodynamic and lab interpretation drills
- Surgical approach and cannulation review, kept proportional to its smaller weight
Timed Full-Length Practice
- Simulate the 2-hour, 90-question format under closed-book conditions
- Review missed items by domain to see if your score gaps track the blueprint weighting
For a step-by-step version of this approach with more detail on resources and review order, the CSC Study Guide 2026: How to Pass on Your First Attempt is worth reading alongside this article. Running full-length timed practice sets on CSC Exam Prep can help you get a realistic feel for the pacing before test day.
Fees, Registration, and Retake Mechanics
The initial CSC exam fee is $150 for AACN members and $240 for nonmembers. To sit for the exam, you need an unencumbered U.S. RN or APRN license plus either the 1,750-hour two-year practice route or the 2,000-hour five-year route detailed in AACN's eligibility criteria - both routes require a substantial share of those hours to be spent caring for adults in the first 48 hours after cardiac surgery.
Because eligibility hours can be audited, you'll need to identify a clinical supervisor or RN/physician colleague able to verify your practice hours if requested. Full eligibility mechanics, including the exact hour breakdowns for each route, are covered in CSC Requirements 2026: Eligibility, Prerequisites & How to Qualify. For the complete cost picture - including renewal fees - see CSC Certification Cost 2026: Complete Pricing Breakdown.
After You Pass: Renewal Requirements
Passing the exam earns you certification that lasts 3 years. Renewal isn't automatic - you'll need to maintain your qualifying license and base certification, log 432 first-48-hours postoperative adult cardiac-surgery practice hours during the 3-year cycle (including 144 in the latest year), and complete either 25 relevant Category A Clinical Judgment CERPs or retake the renewal exam.
- CERP renewal fee: $75 member / $130 nonmember
- Exam renewal fee: $125 member / $170 nonmember
Keeping a quick-reference version of these numbers, along with the scored-question threshold, on hand while you study can save time later. The CSC Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses these figures into a single review page.
Frequently Asked Questions
You need 55 correct answers out of the 75 scored questions. The exam includes 15 additional unscored questions that don't count toward this total but are indistinguishable from scored items.
The domain weighting changes for exams on or after November 19, 2026, but the fundamental scoring structure - 75 scored questions with a defined cut score - is what candidates should track alongside their specific exam date.
Therapeutic Interventions, at 43% of the exam, is the single largest domain under both the current and revised blueprints. Complications is the second priority at 33% (or 37% after November 19, 2026).
No. The CSC exam is closed-book, delivered at PSI test centers or via Live Remote Proctoring, with 90 total multiple-choice questions in a 2-hour session.
You can retest, though AACN's specific retake waiting periods and policies should be confirmed directly through the exam handbook. Reviewing where your score fell short by domain is the most useful first step before scheduling again.