National Harbor, Md. — The NCAA’s president, Myles Brand, will miss most of the association’s annual meeting this week at this Potomac River resort, just outside Washington, because of an undisclosed medical condition.

Mr. Brand, who is 66, is a former president of Indiana University and the University of Oregon, and has been the NCAA’s chief executive since 2003. He announced today that he would forgo all but the final day of the convention for medical reasons.

“Having been blessed with good health all my life, it is particularly frustrating to have to miss significant portions of the convention,” Mr. Brand said in a memorandum sent this afternoon to NCAA members. “Nevertheless, I have promised to be a good patient and follow my doctors’ requests.” He provided no further details.

The only segment of the annual meeting Mr. Brand will attend will be final high-level meetings on Saturday, after many of the convention’s 3,000 attendees have gone home. Mr. Brand’s contract is up for renewal at the end of this year.

An outspoken president who often draws upon his experience as a philosophy professor when discussing college athletics, Mr. Brand has made the academic performance of athletes central to his tenure.

This week, at least, his voice will be noticeably absent. —Libby Sander