Shadow care services minister Liz Kendall called for Mr Lamb's statement on Winterbourne View in the wake of a further Panorama broadcast last night which suggested problems existed in other hospitals.
There remain serious concerns about whether the Government has taken all necessary steps to ensure the former patients of Winterbourne View are now receiving safe and effective care.
Last night's Panorama programme revealed 19 patients have been subject to safeguarding alerts since leaving Winterbourne View. Not all of these alerts mean someone has been harmed but Panorama says one was an incident of assault and another has resulted in a criminal investigation.
Ms Kendall said that, while it was right that home operators were responsible for safety, ministers set policy and were responsible for ensuring implementation.
More top news
A van bearing the faces of some of Britain's most wanted fugitives will be driven around parts of Spain popular with expats in a new push.
A list of commemorative events as the UK marks a decade to the day 52 were killed and hundreds injured in London terror attacks.
The veteran US comedian made the admission in a 2005 civil case, newly-unsealed court documents show.