The England international has not managed to become 100 per cent fit following the hernia surgery he underwent during the international break.
John Terry is set to feature for Chelsea agains the Hammers.
“John is available to play,” said Chelsea boss Carlo Ancelotti.
“Lampard needs to have more time to rest. He trained with us this week and has done very well, but he needs to have more time. Maybe he’ll be involved in the Champions League next week (against MSK Zilina on Wednesday).
“I think these players needed to have a rest because they had problems.
“Terry resolved this problem during the two weeks. Lampard had to have the surgery. He did very well because, in seven days, he was able to train again. But obviously we want to give him more time to recover 100 per cent.”
