You can prepare for COMLEX-USA and the USMLE with one plan instead of two. The two exam series cover very similar subjects, so most of your studying counts twice. The part that does not is osteopathic manipulative medicine (OMM), which needs its own scheduled time. The rest of this guide shows how to fold both exams into your coursework, how to sequence them, and how to use practice results to decide where the next hour goes.
TL;DR
- The shared core is large: the subjects are very similar, and COMLEX adds OMM material. Study the core once and add OMM on top.
- Start early and keep it small. The AMA suggests about five hours of focused exam prep each week alongside class, and a daily question habit builds the base before dedicated study.
- If you take both, one DO physician quoted by the AMA recommends taking the USMLE first and COMLEX soon after, within about a week in her case.
- Use practice results to find gaps, not to predict a score.
- Questions built from your own lectures let one session serve class exams and boards at once.
Table of Contents
- Where the two exams overlap, and where they don't
- Start from your coursework, not around it
- A timeline that carries you from MS1 to the dedicated period
- Choose resources that serve both exams
- Where BoardMaster fits
- Sequencing the exams: which first, and how far apart
- Use practice results to decide what to study next
- Our perspective: integrate by source material, not by exam
- FAQ
- Sources
Where the two exams overlap, and where they don't
The first step in integrating anything is knowing what you are merging. According to the AMA's March 2025 report, the subjects covered in COMLEX-USA and USMLE are very similar, with COMLEX including additional material on OMM. An older Federation of State Medical Boards report from 2001 reached the same broad conclusion about overlap between the two programs, though you should treat the exams as they are written today rather than as they were then.
In practice, that gives you three buckets:
| Bucket | What it includes | How to study it |
|---|---|---|
| Shared core | Basic science, pathophysiology, pharmacology, clinical reasoning, systems-based content | One pass, one set of notes, one question bank habit |
| COMLEX-specific | OMM principles, osteopathic diagnosis and treatment content | Scheduled, separate blocks with their own questions |
| Format familiarity | Question style, pacing, stamina on exam day | Timed blocks written in each exam's style as the date nears |
The bucket most students underestimate is the second. In a 2024 survey of fourth-year osteopathic students, 90.5% focused on USMLE Step 2CK first and set aside specific time for OMM, which Step 2CK does not test. The pattern is useful: build the shared core first, then give OMM a calendar slot instead of hoping it fits in leftover time.
It also helps to remember what is required. NBOME's 2024 resources state that all osteopathic students must pass COMLEX-USA Level 1 and Level 2-CE to graduate with a DO degree. The USMLE is optional in that sense, so your decision to take it is strategic, and your plan should protect COMLEX first. For a deeper look at that decision, see our breakdown of COMLEX vs USMLE for DO students.
Start from your coursework, not around it
The most common integration mistake is treating board prep as a separate job that begins when classes end. Then you are running two study systems at once: lecture review for the next exam and a question bank for the board.
The AMA's advice is the opposite. Its February 2025 guidance tells students to build exam preparation into their class studies and to aim for about five hours of focused exam prep each week. Five hours is modest. It is a number you can defend during a heavy block, which is why it works.
One caution from a student-written guide: a 2024 walkthrough for COMLEX Level 1 and USMLE Step 1 says board resources should supplement coursework, and that school assignments come first. That matches how most DO students describe it. Failing a course exam costs you more right now than a slightly slower board schedule.
A simple way to make each study session count twice
Try this weekly rhythm during pre-clinical years:
- After each lecture, turn the main concepts into questions, not just notes. Retrieval beats rereading.
- Tag each topic as core (counts for both exams) or OMM (COMLEX only).
- Once a week, do a mixed block of board-style questions on systems you have already covered in class.
- Before each course exam, go through the questions you missed, since your professor's emphasis is exactly what that exam will test.
That last step is where a lecture-based tool earns its keep. When practice questions are written from your own slides and notes, a missed question tells you something about the class exam and about the board topic in the same moment. We built BoardMaster's AI question generator around this idea: you upload lecture material, and it writes USMLE- and COMLEX-style questions from what your instructors actually emphasized.
A timeline that carries you from MS1 to the dedicated period
The details change by school, but the shape is consistent across the sources we reviewed. Build the base slowly, then speed up.
MS1 and the first half of MS2: light and steady
Your goal is not to "start boards." It is to stop forgetting. Keep flashcards on a spaced repetition schedule and add a small, regular dose of questions. A recurring daily habit such as 20 questions a day is, per the AMA, enough to create a strong foundation before dedicated study. If you want help making that daily habit stick, our guide to consistent daily board exam practice covers the mechanics.
Spring of MS2: ramp up
The same Level 1 and Step 1 guide suggests holding at least 20 questions a day in the spring of second year, rising toward 40, with a goal of finishing a first question bank by April. That is one student's plan, not a rule, so adjust it to your school's calendar and exam dates. The point is the direction: more volume, more mixed blocks, and less passive reading as the dedicated period approaches.
If Step 1 is on your list too, our complete Step 1 study guide maps the same period in more detail.
Level 2: start during clerkships
Level 2 prep is harder to fit because you are working on rotations. In that 2024 osteopathic survey, 71.4% of respondents began dual-exam study before finishing third-year clerkships, mostly in the second half of MS3. If you are in the first half of MS3, that is a signal to begin small now: a daily handful of questions tied to the rotation you are on, plus a weekly OMM review.
One principle from the Level 1 guide applies across all of this. Aim for consistency, accept that some days will be weaker than others, and do not let one slow day turn into a slow week.
Choose resources that serve both exams
The AMA's February 2025 overview lists the usual categories of USMLE preparation: comprehensive review books, subject-specific materials, formal review courses, and question banks. It also notes that most students need a mix of review material and practice questions, to build content knowledge and to get used to test formats, and it advises choosing techniques that work for you.
For an integrated plan, screen each resource with three questions:
- Does it cover the shared core at board depth? If so, it serves both exams.
- Does it connect to what your school is teaching right now? If not, you will be switching contexts all term.
- Is there a separate path for OMM? COMLEX needs it, and Step does not.
A strong setup usually has four layers:
| Layer | Job | Where it fits |
|---|---|---|
| Course-aligned questions | Reinforce what your professors emphasize | Daily, during class blocks |
| Independent board-style question bank | Broad coverage, exam-style stamina | Weekly, then daily in dedicated |
| Spaced repetition flashcards | Long-term retention of facts and images | Daily, 20 to 30 minutes |
| OMM-specific review | COMLEX-only content | Scheduled blocks, separate tracker |
Our QBank of 5,000+ physician-written board-style questions fills the independent question bank layer. AI flashcards with spaced repetition cover retention, and Cortex AI gives you an instant explanation when a concept is not landing. Whatever you choose, the main test is whether you will actually open it on a tired Tuesday.
Where BoardMaster fits
BoardMaster is an online platform for medical students that generates USMLE, COMLEX and class-exam practice questions from the lectures you upload. It also builds flashcards with spaced repetition and medical images, runs AI-driven OSCE clinical skills simulations, produces lecture-based study podcasts, and includes an AI study assistant. There is a COMLEX prep page built for Level 1 and Level 2.
The point is integration: the same upload produces class-exam practice and board-style practice, so you are not choosing between the two each evening.
As published on our site, the free tier costs $0 per month with limited use, the monthly plan is $39.99 per month, and the annual plan is $399.96 per year. Credit packs add access to OSCE and podcast features. You can start on the free tier and see the plans before you commit.
If you want to see the lecture-to-question workflow before uploading anything, the short demo of AI-generated questions shows it step by step.
Sequencing the exams: which first, and how far apart
If you are taking both a COMLEX and a USMLE exam at the same level, order and spacing matter more than most people expect.
The AMA's March 2025 report quotes Dr. Gordon, who recommends taking the USMLE first and COMLEX in close order afterward; she took her exams within a week of each other. The logic is simple. The content overlaps, so the knowledge is at its peak right after the first exam. Leaving a long gap means relearning, and the second exam has fewer days of buffer in your calendar.
Here is how to apply that without copying one person's schedule:
- Check your school's rules first. Your dean's office and your program may have dates, deadlines or requirements that decide this for you.
- Plan OMM review for the gap. If you take the USMLE first, the days between exams are the right place for a concentrated OMM pass.
- Keep a short rest in the middle. Give yourself recovery time, but not enough that the shared content fades.
- Book both test dates early. Test center availability is a practical constraint, so look at the official scheduling pages for each exam.
Students in the 2024 survey also prioritized Step 2CK first for Level 2, and 90.5% scheduled dedicated OMM time. Both patterns support the same plan: shared core first, OMM as its own block.
Use practice results to decide what to study next
Integration only works if you can see where you are weak. NBOME's practice resources page says its assessments can help you gauge your knowledge base and identify gaps, but that COMSAE results should be read alongside other markers of academic performance rather than used to predict a specific future score.
Take that seriously. A single practice score is a data point, not a forecast. A better routine:
- Log every missed question with one reason: knowledge gap, misread stem, or timing.
- Group misses by topic, then by bucket (shared core or OMM).
- Fix core gaps first, since they pay off on both exams.
- Review OMM misses separately, so they do not get buried in a general error log.
- Compare the pattern over weeks, not days.
If your misses cluster on topics from the current block, the fix is class-focused review. If they cluster across old systems, spaced repetition needs more time. That distinction is hard to see in a generic score report, which is why tagging by topic is worth the extra minute.
Our perspective: integrate by source material, not by exam
Most students ask which exam to study for. We think that is the wrong first question. The better one is: where does your material come from?
The common failure we see in the way students describe their prep is this: they study the lecture for the course exam, then open a generic question bank for boards, and the two never connect. The result is double work and the nagging feeling that the class exam tested something the question bank never mentioned. We built BoardMaster because that gap is expensive, and it falls hardest on students who also carry a second licensing exam.
Our approach is to start from your lectures. When questions are generated from the slides and notes your professors actually used, you are learning what your next exam will test, and in the same sitting you are practicing in the style of the licensing exams. That is also why a student can reduce hours without reducing depth: fewer detours into material that will not be tested.
We do not think any one tool replaces the rest of your plan. You still need an independent bank of board-style questions, a retention system, your school's resources and a dedicated OMM routine. What we can say is that the center of an integrated plan should be your own curriculum, with board-style practice built around it.
— Dr. Ahmed Abuzoor
FAQ
Can I use the same study materials for COMLEX and USMLE?
Mostly yes. The AMA reports that the subjects are very similar, so core review books, flashcards and general question banks serve both. The exception is OMM, which COMLEX adds and which needs separate review materials and practice questions.
When should I start preparing for both exams?
Earlier than the dedicated period, but at a small scale. The AMA suggests building about five hours of focused exam prep into each week of class, and a daily set of around 20 questions can build a strong base. For Level 2, a 2024 survey found most osteopathic students began during the second half of MS3.
Should I take the USMLE or COMLEX first?
One DO physician quoted by the AMA recommends taking the USMLE first and COMLEX soon after, and she took hers within a week. Your school's requirements and your own calendar should decide the final order, so ask your dean's office before booking.
Do I have to take the USMLE as a DO student?
No exam is automatically required beyond COMLEX for graduation. NBOME states that osteopathic students must pass COMLEX-USA Level 1 and Level 2-CE to graduate with a DO degree. Whether to add the USMLE depends on your specialty goals, so talk with an advisor at your school.
How do I know which topics to review?
Use practice results as a map, not a prediction. NBOME advises reading COMSAE results alongside other measures of academic performance. Track misses by topic, and separate OMM errors from shared-core errors.
Sources
- Taking both USMLE and COMLEX? What DO medical students must know (AMA)
- Studying for the USMLE or COMLEX-USA tests (AMA)
- Osteopathic medical students' study strategies for COMLEX Level 2-CE and USMLE Step 2CK (IAMSE 2024)
- Report on Licensing Examinations (Federation of State Medical Boards)
- COMLEX-USA Practice Resources (NBOME)
- Understanding COMLEX-USA (NBOME)
- How to Study for COMLEX Level 1 and USMLE Step 1