Thoracic Surgery Pass Rate 2026: What the Data Shows

The 2025 Numbers: What ABTS Actually Reported

The American Board of Thoracic Surgery (ABTS) publishes results for its Part I Written/Qualifying Examination, and the most recent figures available are from 2025: 136 candidates passed out of 172 who sat for the exam. That works out to 79.1% when calculated directly from the board's reported counts. This figure is not broken out as a first-attempt-only cohort, so it reflects everyone who tested that cycle, including any repeat candidates mixed into the total.

That single number tells you something important, but not everything. A pass rate near four out of five candidates suggests the exam is passable for well-prepared surgeons who have completed an approved training pathway, yet it also confirms that roughly one in five candidates does not clear the bar on a given administration. If you're building a study plan, treat that gap seriously rather than assuming the exam is a formality after residency or fellowship.

What "Pass Rate" Does and Doesn't Tell You

A pass rate is a snapshot, not a roadmap. It tells you how many candidates cleared the threshold in a given cycle, but it doesn't tell you which content areas caused the most missed points, how much time candidates spent preparing, or how their training pathway (traditional, integrated six-year, or an approved joint pathway) affected readiness. For a deeper look at how ABTS structures eligibility across these pathways, see our guide to Thoracic Surgery Requirements 2026: Eligibility, Prerequisites & How to Qualify.

It's also worth separating "hard to pass" from "hard to qualify for." Before a candidate ever sits for Part I, they must have completed an approved thoracic surgery training pathway with defined operative experience (averaging 125 major cases per year across pathway-specific totals) and hold an unrestricted U.S. medical license. That pre-exam filter already screens out candidates who aren't operationally ready, which is part of why the written exam's pass rate sits where it does rather than mirroring a broader licensure exam.

Why Exam Structure Shapes the Numbers

Part I is a computer-based exam delivered at Pearson Professional Testing Centers, consisting of 250 multiple-choice questions. The format includes clinical vignettes and possible images, meaning candidates are tested on applied clinical reasoning, not just recall of isolated facts. The exam is split into two equal sections of 2 hours 45 minutes each, for a total testing time of 5 hours 30 minutes.

That length and question volume matter for pacing. With 250 questions spread across two sections, candidates average roughly 66 seconds per question per section if time is distributed evenly, though vignette-style items with embedded images typically demand more reading time up front. Poor pacing on early questions in a section can compress decision-making later, which is one reason candidates report the exam feeling harder in practice than its content outline suggests. For a detailed breakdown of what makes this exam demanding beyond raw content, read How Hard Is the Thoracic Surgery Exam? Complete Difficulty Guide 2026.

Domain Weighting and Where Candidates Lose Points

ABTS's current live written-exam matrix organizes Part I around two broad domains: General Thoracic and Cardiac, each comprising approximately half of the total exam. Within that structure, Acquired Heart Disease represents 25-35% of the overall exam and Lung represents 20-30%. That means a candidate who underestimates cardiac surgical content because they primarily practice general thoracic procedures - or vice versa - is preparing against a skewed picture of the real exam.

For the complete breakdown of how these two domains interact and where subtopics fall within them, see Thoracic Surgery Exam Domains 2026: Complete Guide to All 2 Content Areas. Because TNM staging is explicitly named on ABTS's current initial-certification materials, make sure your staging references reflect the ninth edition rather than older editions you may have trained on.

Fees, Stakes, and Why One Attempt Matters

Part I is not a low-cost undertaking. The application fee is $650, and the written examination itself is $1,750, bringing the total through Part I to $2,400. Because both written and oral examinations are required for initial certification, candidates who continue on to the oral exam add a separate $2,500 fee, bringing combined application and examination fees to $4,900 across the full certification process.

Given those totals, a failed attempt at Part I isn't just a scheduling setback - it's a financial one, since the $1,750 written exam fee is tied to that specific sitting. This is a strong argument for treating the December 7-11 window as a single, well-prepared shot rather than a "see how it goes" attempt. For a full breakdown of every fee across the certification pathway, see Thoracic Surgery Certification Cost 2026: Complete Pricing Breakdown, and for exact scheduling details, check Thoracic Surgery Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Who Sits for Part I

Candidates who reach Part I have already completed an approved thoracic surgery training pathway - traditional, integrated six-year, or an approved joint pathway - along with the required operative experience, averaging 125 major cases per year with pathway-specific totals and distributions. They also hold an unrestricted U.S. medical license at the time of application.

Because eligibility is already tightly gated by training pathway and operative volume, most candidates entering the testing center have substantial clinical exposure to both general thoracic and cardiac cases. The exam's difficulty, then, often comes less from unfamiliarity with the subject matter and more from the density of content tested in a compressed 5.5-hour window, and from the way vignette-based questions demand fast, confident clinical reasoning under time pressure. Employers hiring board-eligible or board-certified thoracic surgeons - academic medical centers, multispecialty groups, and cardiothoracic practices - generally expect candidates to move through this pathway on a defined timeline, which adds its own pressure to pass efficiently rather than repeat cycles. If you're weighing whether pursuing certification aligns with your career goals, Is the Thoracic Surgery Certification Worth It? Complete ROI Analysis 2026 and Thoracic Surgery Jobs both address that question from different angles.

Mapping Preparation to the Domains

Given that General Thoracic and Cardiac each carry roughly half the exam, a preparation schedule should allocate study time proportionally rather than defaulting to whichever domain feels more familiar from daily practice. A useful approach is to block dedicated weeks to each major domain, then follow with focused review weeks on the highest-weighted subtopics - Acquired Heart Disease (25-35%) and Lung (20-30%) - since together they represent close to half of all exam content by themselves.

This kind of structured mapping - rather than generic weekly templates borrowed from unrelated exams - is what separates candidates who use their preparation time efficiently from those who study broadly without targeting the matrix's actual weight distribution. For a full week-by-week plan built specifically around this domain split, see Thoracic Surgery Study Guide 2026: How to Pass on Your First Attempt. If you want a fast-reference companion during final review, Thoracic Surgery Cheat Sheet 2026: One-Page Review of Must-Know Facts consolidates the highest-yield facts in one place. You can also build timed-practice discipline using question sets on our practice test platform, which mirrors the two-section structure candidates face at Pearson centers.

After Part I: The Oral Exam and Continuing Certification

Passing Part I is a milestone, not the finish line. Both written and oral examinations are required for initial certification, and the oral exam carries its own separate $2,500 fee. Candidates who pass Part I should begin oral exam preparation with the same domain-weighted mindset, since the clinical reasoning tested in vignette-based written questions extends naturally into the case-discussion format of the oral exam.

Once certified, new certificates are non-time-limited but subject to continuing certification requirements, with milestones every five years. Maintaining certification requires 150 AMA Category 1 CME credits per five-year cycle, including at least 75 specifically in cardiothoracic surgery, along with licensure, professional-standing, and assessment requirements. This means the study habits built for Part I - tracking domain-specific learning, staying current on staging updates like the TNM ninth edition, and reviewing both general thoracic and cardiac literature - remain relevant well beyond exam day.

To understand exactly what score threshold you're aiming for on Part I, review Thoracic Surgery Passing Score 2026: Exactly What You Need to Pass. And if you're still early in mapping out the certification process itself, Thoracic Surgery Certification and Thoracic Surgery Training lay out the broader pathway from training through initial certification.

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