OMS Collective

CBSE 2027 Dates and Registration for OMS Applicants

The May 2027 date, when registration opens, what it costs and how the exam runs, all in one place.

By the OMS Collective team · Last updated October 22, 2026

Written and reviewed by oral and maxillofacial surgery residents and crosschecked with national guidelines and best practices.

Dates can change. This page summarizes what AAOMS lists as of October 22, 2026. Always confirm on aaoms.org before you plan around a date or pay a fee.

The short answer

  • When: starting in 2027, AAOMS offers the CBSE in May and November. It used to be February and July. AAOMS lists May 1, 2027 for the first 2027 exam.
  • Registration: AAOMS says registration for the May 2027 exam opens by early November.
  • Fee: $400, which AAOMS says is subject to change. Full payment is due with each online registration.
  • Format: 200 questions over 5 hours and 15 minutes, including an optional 15-minute break.
  • Where: a Prometric testing center.

What changed for 2027

If you read older advice about a February or July exam, it is out of date. The new schedule puts the exam in May and November. That moves the timing for students who used to plan around a summer sitting. It can also change how you count backwards from an application deadline, so check your target programs' requirements as well.

How to register

Registration runs through AAOMS. The AAOMS page for OMS applicants has the registration steps and current details. The exam is open to all dental students who are interested in applying to oral and maxillofacial surgery residency.

Testing centers are assigned first come, first served. AAOMS warns that waiting can limit your choice of site and may mean traveling farther. If you know your target month, register as soon as the window opens.

Fees, cancellations and refunds

The fee is $400 and is paid in full when you register. AAOMS lists a cancellation processing fee and refund cutoff dates, and says no-shows are not refunded. The page's cancellation wording still mentions a July exam, which doesn't match the new May and November schedule, so read the current terms and confirm the dates with AAOMS before you register.

Test day format

The CBSE has 200 questions. AAOMS lists 5 hours and 15 minutes, including an optional 15-minute break. A tutorial at the start of the web exam adds about 15 minutes. If you want to practice that stamina, our CBSE Practice Exam 2026 and CBSE Practice Exam 2027 use the same layout: four timed blocks of 50 questions.

Scores

NBME sends an electronic score report within 30 days, and AAOMS receives a copy. Many programs look at CBSE results alongside the rest of an application, so check each program's own requirements.

Accommodations and problems on test day

AAOMS asks you to contact them within one week of registering if you need ADA accommodations. If something goes wrong during the exam, report it to AAOMS within two days.

Working backwards from your date

  1. Pick the sitting you're aiming for and write down the registration opening.
  2. Choose a study plan that fits the time you have. Our free CBSE study schedules cover 1-year, 18-month and 2-year timelines.
  3. Take a full-length practice exam a few months out, then use the report to decide what to review.

New to the exam? Start with the free practice questions or read about the exam itself in What Is the CBSE for Oral Surgery Residency?.

Frequently asked questions

When is the CBSE in 2027?

Starting in 2027, AAOMS offers the CBSE in May and November instead of February and July. AAOMS lists May 1, 2027 for the first 2027 exam.

When does CBSE registration open for May 2027?

AAOMS says registration for the May 2027 exam opens by early November.

How much does the CBSE cost?

AAOMS lists a fee of $400, subject to change. Full payment is due with each online registration.

How long is the CBSE?

AAOMS lists 200 questions over 5 hours and 15 minutes, including an optional 15-minute break, plus a tutorial of about 15 minutes.

When do I get my CBSE score?

NBME sends an electronic score report within 30 days, and AAOMS also receives a copy.

OMS Collective is an independent study resource. It is not affiliated with or endorsed by NBME, AAOMS or the ADA. CBSE and NBME are trademarks of the National Board of Medical Examiners. Nothing here predicts or guarantees a score.