December - March December 1, 2017 - April 14, 2018: Internal Medicine Initial Certification Registration Period April 15, 2018 - April 28, 2018: Late Registration Period March - June January 8, 2018 - June 14, 2018: Subspecialty Initial Certification Registration Period June 15, 2018 - June 28, 2018: Late Registration Period August ABIM Internal Medicine Certification Examination is administered All residents must finish training on or before August 31 in order to take the ABIM Internal Medicine Certification Examination administered earlier in August of the same year October/November Initial subspecialty examinations are administered in October/November All fellows must finish training on or before October 31 in order to take a subspecialty examination in the same year All residents and fellows must first become certified in internal medicine to be eligible to take a subspecialty examination The internal medicine and subspecialty examinations may not be taken in the same year For exam dates visit Certification Exam Information.