Clifford "went to the hospital last night after not feeling well," Higgins said. Details of his condition weren't clear.
Clifford was hired by then-Lakers coach
The Bobcats hired Clifford as their head coach this summer.
"As a precaution, he was held overnight and is undergoing additional tests this morning," Higgins' statement said.
Charlotte is currently 3-2.
[Updated at 2 p.m.: Higgins and the Bobcats released the following update on Clifford's status:
"While at dinner last night, Bobcats Head Coach Steve Clifford suffered chest pains. He went to the hospital and was later admitted. After testing this morning, doctors concluded that a procedure was necessary to place two stents in his heart. He is resting comfortably and is expected to re-join the team soon. Associate Head Coach Patrick Ewing will serve as the acting head coach for tonight's game vs. New York."]