Subspecialties for Diagnostic Radiology

Requirements and Registration

Last verified on June 10, 2020


Diplomates must successfully complete one year of fellowship training (after residency) in a vascular and interventional program accredited by the ACGME or the RCPSC (Canada). They must also complete one year of practice or additional approved training, with at least one-third of that year spent in vascular and interventional radiology. Diplomates who successfully completed their training before 2019 will have 10 calendar years or until December 31, 2024, whichever comes first, to obtain certification. Those who complete their training in 2019 or later will have six calendar years.
  • Fellowship position must be ACGME-accredited.
  • Fellowship training must be documented by a letter from the program director.
  • Practice experience must be verified by a letter from the chief of service or department chair.
  • Evidence of a current state medical license with an expiration date must be provided.
  • Before submitting a subspecialty registration, any outstanding ABR fees must be paid in full.

Leaves of Absence

Leaves of absence and vacation may be granted to fellows at the discretion of the program director in accordance with local rules. Depending on the length of absence granted by the program, the required period of graduate medical education may be extended accordingly. Fellowship program directors and their institutional graduate medical education (GME) offices determine the need for extension of fellowship training. Therefore, it is not up to the ABR to determine graduation dates for individual fellows.


The standard registration window for the VIR Subspecialty Exam (now IR/DR Exam) is November 1 through February 28. Please check back during the registration window to register for the next available exam.  

Recognition and MOC

Recognition of Successful Diplomates

Successful ABR candidates are awarded a continuous ABR specialty certificate in interventional radiology/diagnostic radiology (IR/DR). When the IR/DR certification is issued, the diplomate’s diagnostic radiology certificate will no longer be visible on the ABR website. ABMS CertiFACTS will show the entire certification history, so credentialers will see that the diplomate’s diagnostic radiology certificate was “converted”. Please see the IR/DR Certificate Conversion FAQs for more information.

Maintenance of Certification

Continuous certification in interventional radiology/diagnostic radiology is contingent upon meeting the requirements of the ABR’s Maintenance of Certification (MOC) program. For MOC program details, please see the interventional radiology MOC page.