COMLEX Level 1: Complete Guide (Format, Scoring, Study Tips)
If you're an osteopathic medical student, COMLEX Level 1 is likely the biggest exam standing between you and clinical rotations. It's the first major board exam in the COMLEX-USA series — and while it shifted to pass/fail scoring in 2022, that hasn't made it any less important.
This guide breaks down everything you need to know: what the exam looks like, how scoring works, the current COMLEX Level 1 pass rate, what the COMLEX Level 1 passing score actually means today, how to study for COMLEX Level 1 effectively, and the best resources for COMLEX Level 1 that top-performing students rely on.
Let's get into it.
What Is COMLEX Level 1?
COMLEX Level 1 is the first of three licensing exams in the COMLEX-USA series, administered by the National Board of Osteopathic Medical Examiners (NBOME). It's required for DO licensure in all 50 states.
The exam tests your understanding of foundational biomedical sciences — anatomy, physiology, pathology, pharmacology, microbiology, biochemistry — integrated with osteopathic principles and practice (OPP) and osteopathic manipulative treatment (OMT). Unlike a pure recall test, COMLEX Level 1 presents these topics through clinical vignettes, asking you to apply basic science knowledge to patient scenarios.
Most students take COMLEX Level 1 near the end of their OMS-2 year, typically between May and June. Passing is required before you can advance to clinical rotations at most osteopathic medical schools — making it a genuine gatekeeper on the path to becoming a licensed physician.
COMLEX Level 1 Exam Format
Understanding the format removes a lot of test-day anxiety. Here's exactly what you'll encounter.
COMLEX Level 1 is a one-day, computer-based exam delivered at Pearson VUE testing centers nationwide. The full testing day runs approximately nine hours, broken down as follows:
352 multiple-choice questions divided into 8 sections of 44 questions each
Two 4-hour testing sessions (morning and afternoon)
A 16-minute pre-exam tutorial before the clock starts
60 minutes of pooled break time across three scheduled breaks (after sections 2, 4, and 6)
All questions are single-best-answer format. Some include audiovisual exhibits — clinical images, lab value tables, heart sounds, or short video clips — accessed via an on-screen "Exhibit" button. Headphones are provided at the center.
A few important mechanics to know: individual sections are not separately timed (time is pooled across each 4-hour session), but once you move to a new section, you can't go back. Each section has a review screen showing which questions you've answered, flagged, or left incomplete. On-screen tools include a calculator, text highlighting, and answer strikeout.
Upcoming Format Change (May 2026)
Starting May 7, 2026, the NBOME is reducing COMLEX Level 1 to 320 questions (8 sections of 40) while keeping the eight-hour testing window. The biggest improvement: breaks after every section instead of only three — giving you seven scheduled break opportunities. If you're testing before April 2026, you'll take the current 352-question format.
COMLEX Level 1 Passing Score
This is one of the most common questions students ask — and the answer has changed significantly.
The Pass/Fail Shift
Since May 10, 2022, COMLEX Level 1 has been scored on a pass/fail basis only. You no longer receive a three-digit numeric score. This change mirrored the USMLE Step 1's transition to pass/fail and was driven largely by concerns about student wellness and the misuse of board scores as a blunt residency screening tool.
What's on Your Score Report Now
When results are released, you'll receive two things:
A Pass or Fail designation — this is the only result residency programs see on your ERAS application.
A Formative Performance Profile — a detailed breakdown of your strengths and weaknesses across the COMLEX blueprint categories, rated as "low," "medium," or "high" relative to other first-time takers. This is for your eyes and your COM advisors only — the NBOME explicitly states that residency programs should not request it.
The Old Scoring System (Pre-2022)
Before the transition, COMLEX Level 1 scores ranged from approximately 9 to 999, with the COMLEX Level 1 passing score set at 400. The national mean for first-time takers was around 500–540. That 400 threshold still exists internally as the criterion-based passing standard — it's just no longer reported to students or programs.
When Do Scores Come Out?
Score reports are typically released 4–6 weeks after the end of a testing window (not from your individual exam date). The NBOME posts specific release dates on their website each cycle, with scores available in the NBOME Portal by 5:00 PM Central time.
COMLEX Level 1 Pass Rate
Even in the pass/fail era, the COMLEX Level 1 pass rate tells an important story about exam difficulty.
Current National Numbers
The most recent data indicates a national first-time pass rate of approximately 90.3% for the 2024–2025 testing cycle. Here's how recent years compare:
First-Time Pass Rate
| Testing Cycle | First-Time Pass Rate |
|---|---|
| 2021–2022 (last scored year) | ~92.2% |
| 2022–2023 (first pass/fail year) | ~90.6% |
| 2023–2024 | ~90% |
| 2024–2025 | ~90.3% |
The slight dip after the pass/fail transition aligns with what the USMLE also observed — when the exam becomes binary, some students reduce preparation intensity. Individual schools vary widely, with top programs reporting rates of 97–99% and others falling well below the national average.
Why a ~90% Pass Rate Still Demands Serious Preparation
A roughly 1-in-10 failure rate is significant. A failed attempt appears permanently on your residency applications, and survey data shows that the majority of program directors factor failed attempts into screening decisions. Many COMs now require a minimum COMSAE score (often 450+) before granting permission to sit for COMLEX Level 1 — a policy specifically designed to protect both institutional pass rates and individual student outcomes.
How to Study for COMLEX Level 1
Knowing how to study for COMLEX Level 1 is arguably more important than how many hours you put in. The students who pass comfortably share consistent preparation patterns. Here are the strategies backed by evidence and expert consensus.
1. Start Early with Longitudinal Preparation
The most effective COMLEX Level 1 preparation doesn't begin during dedicated study — it begins during your OMS-1 and OMS-2 coursework. Incorporating even 30–60 minutes of daily board-relevant review (spaced repetition flashcards, question bank questions alongside lectures) builds a durable foundation.
The key insight: your OMS-2 courses in pathology, pharmacology, and microbiology are board material. Learning that content deeply the first time is far more efficient than trying to re-learn it from scratch during a 6-week dedicated period.
2. Build a Phased Study Schedule
Most students take 6–8 weeks of dedicated study time, structured in three phases:
Phase 1 — Content Review (Weeks 1–3): Work through a primary content resource system by system. Watch video lectures, read review materials, and do subject-specific question blocks to reinforce each topic before moving on.
Phase 2 — Question Integration (Weeks 3–5): Shift to random, mixed-topic question blocks of 40–44 questions (mimicking actual exam sections). Increase daily volume to 120–160 questions. Cross-reference every wrong answer with your content resources.
Phase 3 — Exam Simulation (Weeks 5–7): Take full-length, timed COMSAE practice exams. Do a rapid review of weak areas. Focus heavily on OMM review. Schedule your final practice exam 5–7 days before test day so you can rest and walk in fresh.
Plan your days in 2-hour study blocks with short breaks between them. Build in time for meals, exercise, and downtime. Take at least one full rest day per week — burnout is the enemy of retention.
3. Prioritize Practice Questions Above All Else
Every tutoring organization, peer-reviewed study, and top-scoring student says the same thing: practice questions are the single highest-yield study activity for COMLEX Level 1.
Why? Questions force active retrieval, build pattern recognition for clinical vignettes, and expose knowledge gaps that passive reading never reveals. Aim to complete at least one full pass through a major question bank (typically 2,500–3,500+ questions). Always review explanations for both correct and incorrect answers — understanding why the wrong answers are wrong is where the deepest learning happens.
Do your practice blocks in timed, random mode to simulate real test conditions. This builds the pacing discipline you'll need for 44 questions per section.
4. Don't Neglect OMM — It's Free Points
This is where COMLEX Level 1 diverges most from the USMLE. According to the NBOME blueprint, a minimum of 11% of questions directly test OPP and OMT. But because osteopathic principles are woven into clinical scenarios throughout the exam, effective OMM content can reach 15–20% of total questions.
The good news: most students find OMM questions to be among the more straightforward on the exam — if they've prepared. The bad news: neglecting OMM is one of the costliest mistakes students make.
High-yield OMM topics to master include viscerosomatic, Chapman points (especially anterior), counterstrain tender points, sympathetic innervation levels, and the major OMT technique categories (HVLA, muscle energy, counterstrain, myofascial release, craniosacral, facilitated positional release). Start OMM review early in your study period and integrate it with each body system rather than saving it for the last few days.
5. Use COMSAE Practice Exams Strategically
The COMSAE (Comprehensive Osteopathic Medical Self-Assessment Examination) is the NBOME's official practice test. Each Phase 1 form includes 200 questions and costs approximately $60. It provides a three-digit score where 400+ suggests readiness to pass.
The recommended approach:
Take one early in dedicated study as a diagnostic baseline to identify weak areas
Take one mid-study to track progress and adjust your plan
Take one 5–7 days before the real exam as a final readiness check
A 2021 study in the Journal of Osteopathic Medicine by NBOME researchers found that candidates' COMSAE Phase 1 scores increased an average of 23 points with each additional form taken — and that taking multiple forms was independently associated with better COMLEX Level 1 outcomes. Consistent scores of 450+ correlate strongly with passing COMLEX Level 1.
6. Take Care of Yourself
Published research in BMC Medical Education found that during dedicated board prep, 77% of medical students reported burnout and 81% reported worsened anxiety. Protecting your mental and physical health isn't optional — it's a prerequisite for peak performance.
Maintain 7–8 hours of sleep nightly (essential for memory consolidation). Exercise daily, even if it's just a 30-minute walk. Treat studying like a job: when you're "on" for 8–10 hours, commit fully; when you're "off," disconnect completely. Don't hesitate to use your school's counseling resources if the pressure becomes overwhelming.
Best Resources for COMLEX Level 1
Choosing the best resources for COMLEX Level 1 can feel overwhelming — there are dozens of products competing for your attention. The universal advice from tutors, high-scoring students, and medical education experts: pick 2–3 core resources and master them deeply. Going shallow across many materials is far less effective than going deep with a few.
Here are the resources that consistently surface at the top.
Question Banks (Pick One Primary QBank)
1. TrueLearn COMBANK — The most widely used COMLEX-specific question bank, with 2,900+ questions including 600+ dedicated OMM questions. It simulates the Pearson VUE testing environment and offers a mock assessment that predicts pass/fail status. This is the top choice for students taking only COMLEX.
2. UWorld — The gold-standard QBank for clinical reasoning, with detailed explanations that teach you how to think through questions. Written for USMLE but with approximately 85–90% content overlap. Best for students also taking Step 1 or targeting competitive specialties. UWorld has also launched a COMLEX-specific product.
3. AMBOSS — An increasingly popular hybrid platform with 2,800+ COMLEX Level 1 questions, an integrated Knowledge Library, COMLEX-specific study plans, and a score predictor. Strong for students who want an all-in-one ecosystem.
Content Review
1. First Aid for USMLE Step 1 — The most-used reference text in medical education. Use it as a central "home base" for annotations — write in pearls from questions, lectures, and videos throughout your preparation.
2. Pathoma — Dr. Husain Sattar's pathology video series. Chapters 1–3 are considered the single highest-yield material for boards. Short, focused, and brilliantly taught.
3. Sketchy Medical — Visual mnemonic videos for microbiology and pharmacology. Pair with Anki flashcards for long-term retention of bugs and drugs.
4. Pixorize — Visual mnemonics for biochemistry and immunology, filling a niche other resources cover less effectively.
OMM-Specific Resources
1. OMT Review by Savarese ("The Green Book") — The undisputed gold standard for OMM. Concise, high-yield, and covers everything from Chapman points to craniosacral techniques. Read it cover-to-cover during dedicated study and annotate as you go.
2. OMMedicine — Free video courses (theommedicine.com) with a custom 1,200-card Anki deck. Excellent visual supplement.
3. Dirty Medicine OMM playlist (YouTube) — Quick, high-yield video reviews of testable OMM concepts.
Spaced Repetition
Anki with the AnKing deck (V12) — The standard flashcard resource for biomedical science, tagged to align with First Aid, Pathoma, Sketchy, and UWorld. For OMM, supplement with the AnkiStill OMM Deck (3,211 cards) or the D.O. Demeter Deck (1,263 cards).
Official NBOME Resources
COMSAE Phase 1 — Official practice exams (~$60 each). Take 2–3 during dedicated study.
WelCOM Assessment — Self-paced 75-question practice forms written by actual COMLEX question authors, with immediate answer feedback. More diagnostic than the COMSAE for targeted content review.
What Pass/Fail Means for Your Residency Applications
The shift to pass/fail scoring has fundamentally changed the residency application landscape for DO students. Here's what you need to know.
Since residency programs can no longer differentiate candidates based on COMLEX Level 1 scores, other application components have gained significant weight:
COMLEX Level 2-CE scores — Still reported as a three-digit number, Level 2-CE has become the primary numeric metric program directors use to evaluate DO applicants. It's now one of the top four selection factors in program director surveys.
Clinical evaluations and the Dean's Letter (MSPE) — Your performance during rotations matters more than ever.
Research, letters of recommendation, and extracurriculars — These help you stand out in a pool where everyone's COMLEX Level 1 result reads "Pass."
The 2025 residency match saw 92.6% of DO seniors match into residency — the highest rate ever recorded — suggesting the pass/fail transition has not hurt overall DO outcomes. However, the stakes of failing Level 1 remain high: a failed attempt is visible on all future applications and is factored into screening by the majority of program directors.
Should You Also Take USMLE Step 1?
Approximately 60% of DO students historically took at least one USMLE exam. Now that both Step 1 and COMLEX Level 1 are pass/fail, the calculus has shifted. The added cost (~$695 on top of COMLEX), extra study time, and risk of a failed attempt that follows you forever now deliver diminishing returns for a second binary result.
Current guidance: individualize the decision. Students targeting highly competitive specialties (dermatology, orthopedic surgery) or specific geographic regions may still benefit. Students targeting primary care or less competitive specialties can likely focus exclusively on COMLEX Level 1. Talk to your school's residency advisors before deciding.
Registration and Retake Policies
Here's the practical logistics at a glance:
Registration happens through the NBOME Portal after your COM certifies eligibility
Exam fee is approximately $745 (verify current pricing on the NBOME website)
Scheduling is available up to 6 months in advance at Pearson VUE centers — book early, as May–June dates fill quickly
Score release occurs 4–6 weeks after each testing window closes
Maximum attempts: 4 scored attempts per exam level, with a 60-day waiting period between the first and second attempts and 90 days between subsequent attempts
Rescheduling fees apply for changes within 30 days of your exam date
Key Takeaways
COMLEX Level 1 remains a defining milestone in your osteopathic medical education, even with pass/fail scoring. Here's what to remember:
The exam is 352 questions across 8 hours (changing to 320 in May 2026) — a genuine test of knowledge and endurance
The COMLEX Level 1 passing score is criterion-based at 400, but you'll only see "Pass" or "Fail" on your report
The national COMLEX Level 1 pass rate sits around 90%, meaning roughly 1 in 10 students fail on their first attempt
When figuring out how to study for COMLEX Level 1, prioritize practice questions, start early, build a phased schedule, and don't skip OMM
The best resources for COMLEX Level 1 come down to 2–3 core tools mastered deeply — a strong QBank (COMBANK, UWorld, or AMBOSS), a content review system (First Aid + Pathoma + Sketchy), and the Savarese green book for OMM
Pass COMLEX Level 1 confidently, then channel your energy into excelling on Level 2-CE — because in the post-pass/fail world, that's the score that opens residency doors.
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