Rep. John Dingell, 88, was admitted to Henry Ford Hospital in Detroit on Monday with abdominal pain.
According to his office, the 29-term Democrat from Michigan "remains in good spirits" and hopes to get back to work soon.
"Dingell is doing well, is receiving an IV treatment of antibiotics, and remains in good spirits," according to a statement from Dingell's office. "Doctors expect him to be released in a few days, and Dingell expects to be in Washington for congressional session next week."
Dingell, a stalwart Democrat who is the longest-serving congressman in U.S. history, has a good sense of humor about his senior status. His hilarious Twitter account, which is managed by communications director Christopher Schuler, is gently self-effacing.
His wife, Debbie Dingell, has announced she will run for her husband's seat when he retires in January. Washingtonian magazine recently called her a "shoo-in," and included her in its September list of influential power players it would like to have over for dinner.