The American Board of Pathology (ABP) began issuing time-limited certificates in 2006. New diplomates of the ABP are required to participate in the ABP's Maintenance of Certification (MOC) program to maintain certification. Voluntary participation in the MOC program is also available to diplomates with non-time-limited certificates. To update the pathology community on the requirements of the ABP's MOC program and some current MOC policies and to demonstrate the value of MOC participation for both time-limited and non-time-limited certificate holders. This review uses ABP-archived minutes of the MOC Committee, the ABP MOC Booklet of Information, the ABP Pathway system reports, and the collective experiences of the ABP trustees and staff. The ABP's MOC program has active participation by almost 5000 diplomates of the ABP. The ABP, in conjunction with the American Board of Medical Specialties, continually strives to enhance the relevance and value of MOC to our diplomates and to the public.