The ABIM schedule dictates the critical windows for physicians to register for and complete their initial certification and Maintenance of Certification (MOC) examinations. For 2026, the Internal Medicine Certification exam is scheduled for August, while subspecialty exams and Longitudinal Knowledge Assessment (LKA) windows occur throughout the year. Registration typically opens in December 2025 for most 2026 sessions.
Successfully navigating the American Board of Internal Medicine (ABIM) requirements necessitates a clear understanding of the academic and calendar year cycles. Whether you are a resident preparing for your first board exam or a seasoned subspecialist managing your MOC points and assessments, the schedule is the most vital component of your professional planning. Missing a registration deadline or a testing window can result in significant late fees or, in some cases, the temporary loss of "Board Certified" status.
Understanding the ABIM Examination Cycles
The ABIM manages two primary types of schedules: the Initial Certification schedule and the Maintenance of Certification (MOC) schedule. While both utilize the same general registration infrastructure, their testing windows and frequency vary significantly.
Initial Certification Schedule
Initial certification is for physicians who have recently completed their residency or fellowship training. The Internal Medicine (IM) exam is the most common and is offered once per year, typically in August. Subspecialty exams (such as Cardiology, Gastroenterology, or Infectious Disease) follow different cadences; some are offered annually, while others are offered biennially.
Maintenance of Certification (MOC) Schedule
For physicians already certified, the MOC schedule offers more flexibility but requires more frequent touchpoints. As of 2026, physicians generally choose between the Longitudinal Knowledge Assessment (LKA) and the Traditional 10-Year MOC Exam.
- The LKA Schedule: This is a five-year cycle where physicians answer questions quarterly. It is designed to be integrated into a physician's regular routine rather than requiring a single, high-stakes testing day.
- The Traditional MOC Schedule: This remains a single-day examination taken once every ten years at a secure testing center.
2026 Internal Medicine Certification Schedule
The Internal Medicine Initial Certification exam is the gateway to professional practice for thousands of residents. Because this exam is only offered once a year, the schedule is rigid.
Registration Windows
For the 2026 exam, registration is expected to follow this general timeline:
- Early Registration: Opens December 1, 2025, and runs through February 2026.
- Regular Registration: Continues through April 2026.
- Late Registration: Typically ends in mid-June 2026. Note that late registration incurs a substantial additional fee (often several hundred dollars).
Exam Dates
The 2026 Internal Medicine Certification Exam will be administered over several days in August 2026. Candidates select a specific day within the window when they schedule their seat through Pearson VUE. It is important to register early to secure a seat at a preferred local testing center, as high-demand locations fill up quickly.
2026 Subspecialty Exam Schedule
Subspecialty exams are divided into Spring and Fall windows. Not every subspecialty is offered every year, so candidates must verify their specific field's availability for 2026.
Spring 2026 Subspecialties
Common subspecialties tested in the Spring (usually April or May) include:
- Cardiovascular Disease
- Infectious Disease
- Nephrology
- Pulmonary Disease
Registration for Spring exams typically opens in October of the previous year and closes in early February.
Fall 2026 Subspecialties
Common subspecialties tested in the Fall (usually October or November) include:
- Endocrinology, Diabetes, and Metabolism
- Gastroenterology
- Hematology
- Medical Oncology
- Rheumatology
Registration for Fall subspecialty exams generally opens in April 2026 and closes in June or July 2026.
The Longitudinal Knowledge Assessment (LKA) 2026 Schedule
The LKA has transformed the ABIM schedule from a "once-a-decade" event into a continuous process. For physicians opted into the LKA in 2026, the schedule is defined by quarterly deadlines.
Quarterly Question Cycles
The LKA provides 30 questions per quarter. These must be completed by the end of each three-month block:
- Quarter 1: January 1 – March 31
- Quarter 2: April 1 – June 30
- Quarter 3: July 1 – September 30
- Quarter 4: October 1 – December 31
Physicians can answer questions at their own pace during these windows. However, if you do not answer the required number of questions by the end of the five-year cycle, you may lose certification. The LKA schedule is "rolling," meaning you must stay engaged every year to maintain your status.
Registration Fees and Financial Deadlines
The ABIM schedule is also a financial schedule. Understanding the costs associated with each deadline is essential for budgeting, especially for those whose employers do not fully reimburse board fees.
| Exam Type | Regular Registration Fee (Est.) | Late Fee Surcharge | MOC Annual Fee |
|---|---|---|---|
| Internal Medicine (Initial) | $1,400 - $1,600 | $400 | N/A |
| Subspecialty (Initial) | $2,000 - $2,300 | $400 | N/A |
| Traditional MOC Exam | $700 - $900 | $400 | Included in Annual Fee |
| LKA (MOC) | Included in Annual Fee | N/A | $200 - $300/year |
Note: Fees are subject to annual adjustments by the ABIM Board of Directors.
How to Schedule Your Exam with Pearson VUE
Once you have registered with the ABIM and paid your fees, the next step in the schedule is "Seat Selection." The ABIM does not host the exams themselves; they partner with Pearson VUE.
- Wait for the Authorization to Test (ATT): After your ABIM registration is processed, you will receive an email notification that you are eligible to schedule your seat.
- Log in to Pearson VUE: Use your ABIM ID to log in to the Pearson VUE medical boards portal.
- Select Location and Date: You will see a map of available testing centers. Because many boards (not just Internal Medicine) use these centers, the "schedule" you see on Pearson VUE may be more limited than the broad window ABIM provides.
- Confirmation: Ensure you receive a confirmation email from Pearson VUE. Without this, you do not have a reserved seat, regardless of your ABIM registration status.
Rescheduling and Cancellation Deadlines
Life events often interfere with the ABIM schedule. The board provides specific windows for changing your plans, but these are time-sensitive.
- Rescheduling: Most exams can be rescheduled within the same testing window if done more than 48-72 hours in advance through Pearson VUE. However, availability at testing centers is not guaranteed.
- Cancellations: If you cancel your exam registration, the refund amount depends on how close you are to the exam date. Generally, cancellations made more than 30 days before the exam window result in a partial refund (minus an administrative fee). Cancellations made within the month of the exam often result in the forfeiture of the entire fee.
- MOC LKA Flexibility: One advantage of the LKA schedule is that there is no "cancellation." If you miss a few questions one quarter, you can often make them up in a future quarter within the same five-year cycle, provided you meet the minimum threshold of 500 questions over five years.
Preparing for the 2026 Schedule: A Recommended Timeline
To avoid the stress of the ABIM schedule, physicians should follow a backward-planned preparation timeline.
12 Months Before (August 2025)
- Verify your certification expiration dates on the ABIM "Physician Portal."
- Decide between the LKA and the Traditional MOC exam.
- Ensure your state medical license and clinical credentials are up to date, as these are prerequisites for registration.
9 Months Before (November 2025)
- Check for the official opening of the 2026 registration window.
- Secure funding or reimbursement approval from your hospital or group practice.
6 Months Before (February 2026)
- Complete your registration to avoid late fees.
- Book your testing center seat via Pearson VUE immediately upon receiving your ATT.
3 Months Before (May 2026)
- Finalize your study plan.
- Verify that any required MOC "points" (aside from the exam) are being earned through CME or other activities.
Score Release Schedule
The ABIM schedule does not end when you leave the testing center. Scores are not provided instantly because the ABIM performs extensive statistical analysis and psychometric validation to ensure fairness.
- Internal Medicine Exam: Scores are typically released 10 to 12 weeks after the last day of the testing window. For an August exam, this means results usually arrive in late October or early November.
- Subspecialty Exams: These follow a similar 3-month timeline.
- LKA Results: One of the benefits of the LKA is "immediate feedback." While your final passing status is determined at the end of the cycle, you receive feedback on whether you answered individual questions correctly immediately after submission.
FAQ: Common ABIM Scheduling Questions
Can I change from the LKA to the Traditional MOC exam mid-year?
Yes, but the transition depends on where you are in your cycle. If you decide the LKA is not right for you, you can register for the Traditional MOC exam during the next available registration window. However, you cannot "transfer" the specific schedule of one into the other mid-quarter.
What happens if I miss the registration deadline for my 2026 exam?
If you miss the late registration deadline, you generally cannot take the exam in 2026. For Initial Certification, this means waiting until 2027. For MOC, if your certification expires in 2026 and you miss the window, your status may change to "Not Certified" on the ABIM website until you pass the next available exam.
Are there accommodations for pregnancy or medical emergencies?
The ABIM provides a "Comfort Aid" list and formal accommodations for candidates with documented disabilities or medical needs (including nursing mothers). Requests for accommodations must be submitted at the time of registration and often require specific documentation from a healthcare provider. The schedule for these requests is strict, as they must be approved before a seat can be booked at Pearson VUE.
How often are subspecialty exams like Transplant Hepatology offered?
Some niche subspecialties are only offered every two years. For 2026, you must check the "Exam Availability" page on the ABIM website to see if your specific subspecialty is on the rotation. If it is not offered in 2026, it will almost certainly be available in 2027.
Does the ABIM schedule include MOC points?
The "exam schedule" and the "MOC points deadline" are related but distinct. You must earn a certain number of MOC points (usually 100 points every five years, with at least some activity every two years) to be considered "Participating in MOC." Even if you pass your exam, failing to meet the points schedule can impact your certification status.
Practical Recommendation for 2026 Candidates
The most effective way to manage the ABIM schedule is to register in December 2025. Early registration provides two distinct advantages: it minimizes the financial burden by avoiding late fees, and it grants you the first choice of testing dates and locations at Pearson VUE. If you are opting for the LKA, set a recurring calendar reminder for the first day of every quarter (January 1, April 1, July 1, and October 1) to log in and complete at least 10 questions. This prevents a "logjam" of questions at the end of the quarter and ensures that your participation remains consistent. Finally, always double-check your "Physician Portal" on the ABIM website, as it is the only definitive source for your personal deadlines and requirements.
