Maintenance of Certification for Diagnostic Radiology

Part 3: Assessment of Knowledge, Judgment, and Skills

Last verified on March 18, 2022
Part 3 requires passing the most recent summative decision for Online Longitudinal Assessment (OLA) or having passed a traditional exam in the previous five years. Diplomates are limited to three attempts if taking the traditional exam to satisfy Part 3 of MOC.
Individual diplomates can determine their need to take the current MOC exam by logging in to myABR. If you need more information about the traditional MOC exam, please click here.

Overview of the OLA Process

Within the OLA product, diplomates create a practice profile of the subspecialty areas that most closely fit what they do in practice, as they previously did for the ABR’s modular MOC exams. They are provided two question opportunities each week, relevant to their selected practice profile. Question opportunities will be available for four weeks to allow maximum diplomate flexibility.
After opening a question, diplomates are allowed a limited amount of time to answer the question and they learn immediately whether they answered correctly. In addition, they receive a brief explanation of the correct answer, as well as a reference.
OLA is designed to have minimal impact on a diplomate’s workday and requires no time away from work or travel expense. The potential for retesting areas of weakness provides a further opportunity for diplomates’ self-assessment of their professional growth.
For more information, please see OLA FAQs.


OLA became available to all diagnostic radiology diplomates in early 2019. OLA for radiation oncology, medical physics, and interventional radiology diplomates followed in 2020.
To ensure their certificates remain valid, diplomates must continue meeting requirements for Parts 1, 2, and 4 of MOC and make their yearly attestations in myABR.