Moore has been admitted to Brookwood Hospital in Birmingham for tests and treatment, according to the school.
Moore, 73, was admitted to DCH Regional Medical Center in August 2012 for an irregular heartbeat, and at the time, the university released a statement saying the admittance was a precautionary measure.
Moore has served as athletics director at Alabama since Nov. 23, 1999. He played at Alabama under Bear Bryant and served as an assistant under Bryant for the Tide during 1964-82. He also coached at Alabama under Gene Stallings during 1990-93.