COMLEX Exam Guide 2026: Levels, Format, Timeline, and Prep for DO Students

What is COMLEX-USA

The Comprehensive Osteopathic Medical Licensing Examination is the licensure pathway for osteopathic medical students. Passing the required levels is needed for graduation at many DO schools and for eligibility to enter residency. 

How many COMLEX exams are required in 2026

There are three active exams today: Level 1, Level 2 Cognitive Evaluation, and Level 3. The former in-person Level 2 Performance Evaluation was suspended in 2021 and formally discontinued in June 2022. Clinical skills are now verified by the medical school. 

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Level 1 at a glance

• Format and day length: 

Single day, approximately nine hours including tutorial and scheduled breaks.

• Focus: 

Foundational biomedical sciences, clinical problem solving, and osteopathic principles.

• Scoring: 

Pass or fail for exams taken on or after May 10, 2022.

Update to know

NBOME’s 2026–2027 Bulletin notes Level 1 will reduce total questions to 320 effective May 2026. Plan your study approach with that change in mind if you will test after that date. 

Level 2 CE at a glance

• Format: 

Single day, similar length to Level 1.

• Focus: 

Application of clinical knowledge in core disciplines in supervised settings.

• Breaks: 

Pooled 60 minutes across scheduled breaks on exam day.

Level 2 PE status

Level 2 PE is retired. Schools attest to clinical skills readiness as part of eligibility. 

Level 3 at a glance

• Schedule: 

Two testing days within a 14-day window.

• Structure: 

Four sessions of 3.5 hours total, across both days.

• Items: 

420 multiple-choice questions plus 26 Clinical Decision-Making cases, each with two to four extended MCQ or short-answer questions.

COMLEX vs USMLE in one minute

• Requirement: 

DO licensure uses COMLEX. MD licensure uses USMLE. Some DO students also take USMLE to broaden residency options or simplify cross-applicant comparisons; decide based on your target programs. 

• Reality check: 

ACGME programs can accept either exam for eligibility. Many programs review COMLEX in holistic evaluation.

Exam-day logistics that matter

• Breaks: you receive a pooled 60 minutes of break time per exam day, usable over three scheduled breaks. Manage food, hydration, and screen rest with this pool in mind.
  
  

Smart prep plan you can start this week

I. Map your window

Time Level 1 after core systems courses, Level 2 CE after clinical exposure, and Level 3 when you can protect two focused days.

II. Train for stamina

Do weekly full-length blocks to simulate 8 to 9 hour days. Practice timing your breaks so you never cut into test time.

III. Use mixed Q-banks and spaced repetition

Track weaknesses by organ system and competency. Convert every miss into a brief rule or takeaway you can review later.

IV. Add CDM practice for Level 3

Drill case prompts under time to refine ordering, safety, and next-best-step reasoning. 

V. Build clinical context

Reflect on real patient encounters to strengthen pattern recognition and ethics scenarios.

Quick FAQs

#1. Is Level 1 still pass or fail

Yes. Pass or fail for administrations on or after May 10, 2022.

#2. Do I need to plan for Level 2 PE

No. It was formally discontinued in June 2022. Schools verify clinical skills. 

#3. How is Level 3 different

Two testing days within a 14-day window, 420 MCQs plus 26 CDM cases. Expect both extended MCQs and short answers. 

#4. How long is each day for Level 1 and Level 2 CE

About nine hours including tutorial and scheduled breaks. You have a pooled 60 minutes for breaks. 

#5. What will change for Level 1 after May 2026

NBOME plans to reduce total questions to 320.

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Article Details

Categories

Recent Articles , Pre-health, Medical Electives, MCAT/MSAR/USMLE, Med Schools,

Author: Go-Elective Abroad

Date Published: Dec 15, 2025