The 29-year-old, who made his Tigers debut back in August 1996, said: “I am thrilled to have added a further two years to my contract, having been at the club for over ten years now.
“All I wanted to do was to continue wearing the Leicester Tigers shirt and to bring further silverware to the Tigers.”
Moody has collected five Premiership titles in his Tigers career, plus the inaugural Zurich Championship and back-to-back Heineken Cups.
He returned to club duty this season after playing in his second World Cup Final in the autumn and is now just seven short of 150 starting appearances for Tigers, as well as making a further 43 appearances from the replacements bench in a career which began when he was still at Oakham School.
Tigers forwards coach Richard Cockerill said: “Lewis is a world-class player and he has been playing consistently well for us. We are delighted that he has agreed a new contract.”
Moody captained Leicester Tigers for the first time in the Guinness Premiership victory over Leeds Carnegie at Headingley last month and passed the 50-cap mark for England during the World Cup.