MMS Exam Dates 2026: Testing Windows, Deadlines & Scheduling

The 2026 Testing Window at a Glance

Unlike exams that offer rolling testing windows across several weeks, the AOBD's Subspecialty Certification in Mohs Micrographic Surgery (MMS) is administered on a single fixed date each cycle. For 2026, that date is September 24. There is no alternate sitting later in the year and no regional flexibility in the schedule - if you miss the date, you wait for the next annual cycle. That makes the application deadlines that precede it arguably more consequential than the exam date itself, since a missed paperwork deadline is functionally the same as a missed exam.

If you're still mapping out whether you're even eligible to sit this year, it's worth reviewing MMS Requirements 2026: Eligibility, Prerequisites & How to Qualify before you lock in a study calendar around this date.

Key Dates for the 2026 AOBD MMS Exam

The gap between the final application deadline and the exam date - roughly two months - is intentional. It gives the AOBD time to process practical case submissions, verify eligibility documentation, and confirm CLIA paperwork before candidates are cleared to sit for the written component.

Application Deadlines and What Happens If You Miss One

The AOBD structures its MMS application around two deadlines rather than one:

• June 24, 2026 - the standard application deadline. Applying by this date avoids any late penalty.
• July 24, 2026 - the final, absolute deadline. Applications submitted between June 25 and July 24 are still accepted, but they carry a USD 540 late fee on top of the standard fee.

After July 24, there is no mechanism to register for the September 24 exam that year. This is different from exams where a short grace period or waitlist exists - the AOBD's process is unforgiving of late submissions, largely because the practical case review has its own internal processing timeline that can't be compressed.

Eligibility Pathways and the Clinical Pathway Sunset

Before scheduling anything, confirm which eligibility route you're using, because each has different documentation lead times:

All three routes also require active AOBD certification, current medical licensure, training and ethical documentation, and CLIA documentation - none of which are optional regardless of pathway. For a deeper breakdown of how these requirements interact, see MMS Requirements 2026: Eligibility, Prerequisites & How to Qualify.

What the Exam Day Actually Looks Like

The September 24 date covers two distinct components, and understanding their structure helps you plan how much runway you need before applying.

Written Component

The initial written exam consists of 110 multiple-choice questions administered in two hours. Coverage spans the AOBD's published preparation topics: tumor biology and cutaneous oncology, indications for MMS, surgical technique, surgical anatomy, local and regional anesthesia, preoperative evaluation, histological technique, wound care and wound healing, dermatopathology, surgical complications, and instrumentation. These are the same eleven areas detailed in MMS Exam Domains 2026: Complete Guide to All 11 Content Areas.

Practical Component

The practical component evaluates six submitted representative cases, with an oral explanation required if the AOBD requests one. This isn't a bedside practical performed on exam day in the traditional sense - it's a case-submission review, which means the "deadline" for this component actually falls earlier in your prep timeline, not on September 24 itself.

Fee Schedule and Retake Costs

Notice that a both-component retake costs the same as the initial application. That's a meaningful incentive to pass both the written and practical components in the same cycle rather than splitting your risk - a candidate who fails only one component pays half as much to retake it as someone who has to redo both. For a full cost breakdown including what these fees mean relative to the certification's ten-year term, see MMS Certification Cost 2026: Complete Pricing Breakdown.

Scheduling Your Prep Around the September Date

With a fixed September 24 date and a July 24 final application deadline, most candidates have a realistic prep window of three to six months, depending on when they decide to commit. Rather than a generic study calendar, anchor your schedule to the two things that are actually due before the exam: your practical case submission and your domain mastery for the 110-question written exam.

For a more detailed walkthrough of how to sequence study by domain weight and difficulty, see MMS Study Guide 2026: How to Pass on Your First Attempt. If you're still calibrating how demanding this exam is relative to your current caseload and schedule, How Hard Is the MMS Exam? Complete Difficulty Guide 2026 is a useful gut-check before you commit to a September sitting.

Practical Cases: Deadlines Within the Deadline

One of the most consequential scheduling details in the entire MMS process is this: missing your practical case submission prevents you from taking the written component for that cycle. The two components aren't independent tracks you can pass in either order or on separate timelines - practical case clearance is a prerequisite gate for the written exam.

If your submitted cases are found insufficient or you need to retake the practical component, the AOBD requires three new cases - not a resubmission of the original six. This has real scheduling implications: if you're relying on recent case volume to fill out your six representative cases, don't wait until the final weeks before the July deadline to start compiling documentation. Build in time to swap out a case if one doesn't meet criteria.

Recertification and OCC Timing

Passing the initial exam isn't the end of the calendar-watching. MMS subspecialty certification carries a ten-year term, subject to the AOBD's Osteopathic Continuous Certification (OCC) requirements. Time-limited Diplomates need 60 CME credits during the 2025-2027 cycle, including 20 specialty-specific Category 1-A credits. If you're newly certifying in 2026, it's worth understanding this cycle structure early rather than discovering the CME requirement close to a deadline. This is separate from the Mohs OCC exam itself, which is a distinct 100-question assessment described elsewhere in AOBD's certification materials - don't confuse its requirements with the initial written component's 110-question, two-hour format covered on this page.

To understand how the scaled scoring works for the initial exam specifically, see MMS Passing Score 2026: Exactly What You Need to Pass, and for a broader look at whether the ten-year investment pays off across a career, Is the MMS Certification Worth It? Complete ROI Analysis 2026 walks through that question in more depth.

Once you have your dates locked in, the most efficient way to use the remaining months is consistent practice against realistic question formats. You can start working through timed question sets on the main practice test platform to get a feel for the two-hour, 110-question pacing well before your September sitting. Reviewing performance patterns across the eleven domains on the practice site can also help you decide where to reallocate study time in the months before your application deadline.

Frequently Asked Questions