Due to a system outage, exam applications are currently unavailable. Access will be restored as soon as possible.

Written Exam


To be eligible for certification in Radiation Oncology, candidates must meet the criteria below:

  • Be a graduate of a COCA-accredited college of osteopathic medicine.
  • Satisfactorily complete a one-year internship in an AOA-approved training program.
  • Satisfactorily complete, or be in their fourth year of, four years of AOA-approved training in radiation oncology (three years if training was started prior to July 1, 1999). Training should be completed in a single program; if the candidate transfers from one program to another, this must be approved by the AOBR.
  • Have AOBR approval of all completed training
  • Hold an unrestricted license to practice in a state or territory.
  • Adhere to the AOA Code of Ethics.

Candidates are eligible to take the Radiation Oncology written exam in their third year of training or at any exam administration after.

Candidates who have passed the Radiation Oncology Written Exam are eligible to take the Radiation Oncology Oral/Practical Exam during their fourth year of training, or at any examination following training as long as they are still board eligible.


At the time of application, you must submit the following to the AOBR:

  • A completed application.
  • Annual fee.
  • Copy of your current state medical license.


Exam Fees

An annual fee of $400 must accompany your completed application. No application will be considered complete until all fees have been paid.

Exam Dates and Deadlines

The Radiation Oncology Written Exam is offered in June of every year. The application period opens Dec. 1, and applications are due Feb. 1.

Exam Content Outline

The Radiation Oncology Written Exam consists of three parts and is given in one session: Part I-Radiobiology, Part II-Physics and Part III-Clinical. Part I and Part II are offered in the morning and Part III is offered in the afternoon. The exam includes both multiple choice and true/false questions.

The exam format is as follows:

Subspecialty Certification
Part I – Radiobiology 70 questions 1 ½ hours
Part II – Physics 70 questions 1 ½ hours
Part III – Clinical 110 questions 1 ½ hours

Topics include the following:

  • Radiobiology
  • Physics
  • Clinical
  • Gastrointestinal Tract
  • Gynecological Malignancies
  • Genitourinary Tract
  • Lymphoma/Leukemia
  • Head, Neck and Skin
  • Breast
  • Central Nervous System and Pediatric Malignancies
  • Lung And Mediastinum, Soft Tissue and Bone

Exam Failure

Candidates will have three consecutive opportunities to pass the Radiation Oncology Written Exam. A candidate failing two or three parts of the written exam must repeat the entire exam at the next consecutive exam. If after three opportunities a candidate fails to pass at least two of the examinations at a single sitting, he/she must submit a new application, fee and appropriate documentation in effect at that time and will be required to repeat all three sections of the written examinations. Failure to accept an appointment, cancellation of an appointment or failure to appear for a scheduled examination will be regarded as one of the three opportunities.