"He is a patient at Suburban, yes," Ronna Borenstein-Levy told United Press International when reached by phone. "That's all the information I have right now. I don't have an condition report on him."
It wasn't known when he entered the hospital or for what reason. He was diagnosed with Alzheimer's disease in 2003.
Shriver, 95, also was the first director of the Office of Economic Opportunity and served as ambassador to France. He wound up on the ballot in 1972 as the Democratic candidate for vice president after Thomas Eagleton withdrew as George McGovern's running mate after it was revealed he had been treated for mental health issues.
He was part of the Kennedy political family, having married Eunice Kennedy, who died in 2009.