COMLEX Level 2: Complete Guide to Format, Scoring & Preparation
Since COMLEX Level 1 moved to pass/fail in 2022, a single exam now determines your residency application as a DO student. That exam is COMLEX Level 2-CE, and how you prepare for it, and what you prioritize, will do more for your Match outcome than anything else you do in your third year.
What Is COMLEX Level 2-CE?
COMLEX Level 2-CE (Cognitive Evaluation) is the second examination in the COMLEX-USA series, administered by the National Board of Osteopathic Medical Examiners (NBOME). It assesses whether you can apply clinical knowledge to patient care and the kind of reasoning you need to manage real patients during rotations and in residency.
Every DO student in an accredited U.S. osteopathic medical school must pass it before obtaining licensure. You take it after passing Level 1 and, in most schools, after completing your core third-year clerkships. Most students sit for it between June and July of OMS-III, going into OMS-IV, specifically because they want that score in hand before ERAS opens in the fall.
Note on Level 2-PE: The USMLE Step 2 CS (Clinical Skills) exam was permanently discontinued in 2021. The COMLEX Level 2-PE was also suspended and has not been reinstated. If you are a DO student, confirm the current status of Level 2-PE requirements with your program, as policies may vary by residency and state licensing board.
COMLEX Level 2 Exam Format and Question Types
Right now, the exam consists of 352 single-best-answer multiple-choice questions organized into eight sections of 44 questions each. You have two four-hour sessions (morning and afternoon), totaling eight hours of active testing time, plus breaks and a tutorial, bringing the total seat time to roughly nine hours.
You get 60 minutes of pooled break time spread across three scheduled breaks. Sections are self-paced within each four-hour session, meaning you can move through questions at your own speed and revisit them, but once you close a section, you cannot go back. Do not rush through early sections, and do not dawdle either. You have about 72 seconds per question on average.
Format change coming in June 2026: The question count drops to 320 (eight sections of 40), and breaks will be scheduled after every section rather than just three times. If you are testing after that date, that is a meaningfully more humane format.
Questions are almost all vignette-based. A patient presents with something, and you choose the best next step, diagnosis, or treatment. Some questions include images (radiographs, skin findings, ECGs) accessed through an exhibit tab. Lab values come embedded in the question when relevant.
The content blueprint has two dimensions worth knowing. First, osteopathic principles and OMM account for a minimum of 10% of questions, and in practice, most students report it feeling closer to 15 to 20% when you count OMM integrated into clinical scenarios. Second, the musculoskeletal system gets the highest single weighting at 13%. The rest is standard clinical medicine: internal medicine, family medicine, pediatrics, OB-GYN, surgery, psychiatry, and emergency medicine, all mixed throughout the exam.
Scoring, COMLEX Level 2 Score Percentiles, and What Actually Counts as Good
Here is the COMLEX Level 2 score percentiles breakdown that matters practically:
| Score | Approximate Percentile | Interpretation |
|---|---|---|
| 800 | 99th | Exceptional |
| 700 | 96th | Outstanding |
| 650 | 90th | Competitive for surgical specialties |
| 600 | 79th | Strong — most specialty doors open |
| 550 | 62nd | Above average |
| 526 | ~50th (mean) | National average |
| 500 | 42nd | Slightly below average |
| 450 | 22nd | Below average |
| 400 | ~9th | Minimally passing |
The NBOME provides a free Percentile Score Converter on its website, which is updated each testing cycle. But here is the clinical translation: 600 is strong enough to keep most specialty doors open. 650 and above puts you in the top 10% and is where you want to be for competitive specialties. The 2024 NRMP Match data showed that matched DO seniors averaged 544, but specialty benchmarks vary dramatically. Family medicine matched candidates averaged around 507, while orthopedic surgery averaged 623 and dermatology averaged 612.
Strong students should aim for 600 or above. Struggling students need to pass first, then focus on building toward the mean. Getting from 380 to 410 is not the same problem as getting from 550 to 600, and your strategy should reflect that.
When Will You Get Your Score Back?
According to the COMLEX Level 2 score release schedule, scores are released in batch windows approximately 4 to 6 weeks after a testing window closes. For the critical summer testing period (June and July), scores are typically released in early to mid-August, in time for ERAS. The NBOME publishes a specific score release calendar each year, and you should bookmark it.
You will receive an email when scores are available; then log in to the NBOME Portal to view your score report. That report includes your three-digit score, a pass/fail designation, and a Performance Profile with graphical breakdowns by content area. All attempts (including failures) are visible to residency programs through ERAS, so there is no way to hide a retake.
COMLEX Level 2 Pass Rate
The national first-time pass rate for COMLEX Level 2-CE was 92.5% in the 2023-2024 cycle, but that number obscures meaningful variation. That sounds reassuring, but it obscures meaningful variation. Students at certain schools or with certain academic profiles fail at significantly higher rates. If you are on academic probation or have previously failed a COMAT shelf exam, you are not in the same risk category as someone with a clean record.
Most schools require a benchmark COMSAE score before they will authorize you to sit for the real exam. That COMSAE score is not just bureaucratic gatekeeping. It is a real predictor of your readiness. If your COMSAE comes in below 450, you should delay your exam date and address the gaps, not push through hoping for better luck on the real thing.
How to Study for COMLEX Level 2 During Rotations
This is where most students either set themselves up for a strong, dedicated study period or dig a hole they cannot climb out of in four weeks. The answer is simple, and very few students actually follow it: do questions every single day during rotations.
Ten to twenty questions per day, matched to your current rotation subject. Not a hundred on the weekends and nothing during the week. Consistent daily practice builds the clinical reasoning that this exam actually tests. It also keeps you ready for your COMAT shelf exams, which compound into your overall academic record.
By the time you hit your dedicated study block, you should have completed at least one full question bank pass. Students who walk into a dedicated study having done 1,000 or more questions already are in a fundamentally different position than students who have done 200.
During the four to six-week dedicated period, eight to twelve hours of focused study per day is standard. Structure your day with question blocks in the morning, when your cognition is sharpest; leave afternoons for reviewing explanations and weak systems; and evenings for Anki and OMM. That structure sounds simple, but execution is where most students fall apart. They review too slowly, never finish their question bank, or spend hours on videos instead of doing active recall.
If you are struggling, the single highest-yield change you can make is doing more questions and reviewing them better, not adding another video resource.
Best COMLEX Level 2 Study Resources
Here is what actually moves scores, ranked by impact:
UWorld (Step 2 CK question bank)
The best clinical reasoning tool available. Thorough explanations, well-written questions, strong differential reasoning training. Use it during rotations and reset it for dedicated study. Its limitation is no OMM content and a more precise question style than actual COMLEX questions.
COMQUEST or TrueLearn
Your essential COMLEX-specific bank. COMQUEST mirrors the shorter, vaguer style of actual COMLEX questions, recalibrating your approach in the final weeks. TrueLearn offers solid OMM coverage and a reliable predictive assessment. You need one of these. UWorld alone is not sufficient.
AMBOSS
Works best during rotations when you want a single platform for questions and reference material. Many students use AMBOSS through OMS-III and save UWorld for the dedicated block.
Savarese OMM Review (The Green Book)
The OMM resource. Read it. It is short. You can get through it in a day. Covers every high-yield OMM topic in a digestible way. Reading it two or three times across your dedicated period is more effective than any other OMM resource.
OMG OMT / Dirty Medicine YouTube OMM Playlist
Useful video-based supplements if Savarese alone does not click for you. Do not use both. Pick one.
Divine Intervention Podcast
For clinical reasoning reinforcement during commutes or downtime. Particularly strong for infectious disease, cardiology, and endocrinology.
AnKing Step 2 Anki Deck + DO-specific OMM Deck
Students who use Anki consistently through rotations arrive at dedicated study with far stronger retention than those who rely on re-reading notes.
COMSAEs (Practice Assessments, Updated 2024 Forms)
Take at least two: one as a baseline at the start of dedicated study, and one about two weeks out. The 2024 updated forms now include answer keys — a significant improvement.
COMLEX Level 2 vs USMLE Step 2 CK
About 60% of DO students now take at least one USMLE exam alongside COMLEX. Whether you should is a separate question, but here is what you actually need to know.
There is no official concordance table between the two exams, but the best available research (Barnum et al., 2022, Journal of Graduate Medical Education) used equipercentile matching to estimate conversions. Roughly: a COMLEX 540 to 559 corresponds to a Step 2 CK of around 227 to 231. A COMLEX 600 approximates Step 2 CK scores in the 255 to 260 range. A COMLEX 700 approximates 275 to 280. The correlation between the two is approximately 0.75, indicating substantial individual variation. Do not use these as anything more than rough estimates.
The differences in content and style matter more than the score conversion. COMLEX questions are shorter, provide less clinical information, and include OMM content with no parallel in the USMLE. USMLE questions tend to be more precisely constructed. Students who primarily prepare with USMLE resources often walk into COMLEX feeling disoriented by its question style, which is one of the main reasons a COMLEX-specific question bank is non-negotiable.
If you are applying to a competitive specialty (surgery, dermatology, radiology, neurology) and you are at a school with a lower-profile name, taking Step 2 CK is a reasonable decision. If you are applying to primary care fields and your COMLEX score is strong, you likely do not need it.
Whatever you decide, do not take Step 2 CK as a fallback plan to compensate for a weak COMLEX score. Both exams require real preparation, and spreading yourself thin between them often produces mediocre results on both.
What Wastes Time and What Actually Works
Using too many resources
Three question banks and four video series are not a preparation strategy. It is a distraction. Pick a primary question bank, a secondary COMLEX-specific bank, and one video series if you need it. Finish them.
Neglecting OMM until the last week
OMM is 10 to 15% of the exam, which translates to 35 to 50 questions. Cramming viscerosomatic reflexes and sacral torsions the night before is a terrible strategy. Build OMM review into every week of your dedicated study block.
Preparing for Step 2 CK alone
UWorld is exceptional for building clinical reasoning, but it will not prepare you for COMLEX-specific ethics content, medical-legal scenarios, or the unique question style. Add a COMLEX-specific bank no later than four to six weeks before the exam.
Not practicing under timed, full-length conditions
Eight hours is a long time to sustain concentration. If you have never done a complete timed practice session before exam day, your pacing and stamina will both suffer. Do at least one full-length COMSAE under realistic conditions before you sit for the real thing.
Interpreting post-exam feelings as data
Nearly every student walks out of this exam convinced they failed. The questions are vague, the content is sometimes jarring, and the format is genuinely uncomfortable. Your gut feeling after this exam is not a reliable predictor of your score. The COMLEX Level 2 score release window is four to six weeks, and that is a long time to catastrophize over a feeling that usually turns out to be wrong.
What You Should Do Next
COMLEX Level 2-CE is a fair exam if you prepare for it honestly. It tests clinical reasoning with an osteopathic lens, and students who develop that reasoning through consistent question-based practice score better than students who try to memorize their way through it. Strong students should build toward 600 and above by starting question work early, using the right resources, and treating OMM as a priority rather than an afterthought. Students who are struggling need to identify whether their problem is content knowledge, question strategy, or exam stamina, and address that specific problem directly.
If you are not sure where you stand, take a COMSAE. That score will tell you more about what you actually need to work on than any amount of second-guessing.
Not Sure Where to Start?
If you want to work through your preparation strategy with someone who has helped students across all score ranges, from students fighting to pass to students pushing for a 650, MedBoardTutors offers a free USMLE and COMLEX consultation where we figure out exactly where you are, what is holding you back, and what to do about it. No sales pitch. Just a real conversation about your prep.
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