The health regulator, The Care Quality Commission, said the next round of inspections will focus on GP out-of-hours services.
The commission said these are "likely to put patents at a higher risk of receiving poor care than from other general practice services."
The health regulator has uncovered a catalogue of failings at some GP practices with medicines stored in a way that puts children and patients at risk of infection and rooms so dirty they had maggots.
More top news
Rain will spread eastwards across southern areas tonight. Clear and frosty in the north.
Political leaders will go head-to-head at ITV's studios in MediaCityUK in Salford, ITV has confirmed, as the set for the event is unveiled.
More than 100 people claiming to represent working people across Britain have signed a letter backing Labour in the general election.