On April 22, 2009 Leno left NBC’s studios during midday according to his spokesman Dick Guttman and was admitted to Providence Saint Joseph’s Medical Center in Burbank after he stated he wasn’t feeling well. He is in the hospital "for observation." Guttman characterized Leno’s ailment, which he couldn’t identify, as "mild." AP His representative Tracy St. Pierre would not disclose the nature of Leno’s illness but did state that "Jay Leno is doing just fine," NBC spokeswoman Tracy St. Pierre told E! News this afternoon Even feeling sick, he made phone calls and wrote jokes on Thursday, Guttman said. Leno, who turns 59 on Tuesday, will leave the The Tonight Show show May 29 after 17 years. No further information was available about Leno’s condition, but Access Hollywood, which first reported the situation, mentioned possible food poisoning.
Cause of Hospitalization announced (2 weeks later)
Jay Leno told People that the cause of his hospitalization, which he was embarrassed to admit, was exhaustion