Lahm was forced from the field after 30 minutes of Bayern's 2-0 DFB Pokal final triumph over Borussia Dortmund on Saturday with a bruised ankle.
But Bayern confirmed on Monday, via their official Twitter account, that the national team captain will take a week-long break from training before heading to a pre-World Cup camp.
Furthermore, Neuer, who picked up a small tear in his shoulder during the weekend's cup triumph, has been cleared to head to Brazil.
The news will come as a huge boost to Germany, who are ranked among the favourites to lift the trophy come July's final.
Joachim Low's men have been drawn in Group G alongside Portugal, Ghana and the United States.
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