Westwood won the European Tour's money title in 2000, but after being ranked at No.4 in the world following that season, has slumped to 180th after two miserable years.
After playing in the European Tours first two events of 2003, this week's South African Airways Open and the Dunhill Championship, Westwood will spend at least 10 days under the tutelage of Leadbetter in Orlando.
'I'm just playing these two weeks and then I don't know when I'll play again,' Westwood said. 'I'm going to see David at the end of January in Florida and then I've not got any tournaments scheduled until March maybe.'
One of Westwoods only highlights in the last two years was his brief return to form as he helped Europe regain the Ryder Cup title from the United States last September at The Belfry in England.