Health secretary Jeremy Hunt told the House of Commons on Thursday that an investigation is under way into possible visits to Guy's Hospital by serial abuser Jimmy Savile.
Updating MPs on investigations into abuse by Jimmy Savile, Mr Hunt said: "Allegations have been made not in one or two places, but in over 41 acute hospitals – almost a quarter of all NHS acute hospitals – as well as in five mental health trusts and two children's hospitals.
"Further investigations have happened at a children's convalescent home, an ambulance service and a hospice.
"Three new investigations are under way at Humber NHS Foundation Trust, Mersey Care NHS Trust and Guy's and St Thomas' NHS Foundation Trust.
"Any further allegations that are received will, of course, be investigated as serious incidents."
In a statement, Guy's and St Thomas' NHS Foundation Trust said that "new information has come to light that Jimmy Savile was seen at Guy's Hospital in June 1980".
"The trust's investigation has considered all available information and its findings will be reported to the trust board before being submitted to the Savile Legacy Unit.
"It has not found evidence of untoward behaviour as a result of the interviews that have been conducted."
Last summer Guy's and St Thomas' said that it "had not identified any formal evidence of Jimmy Savile visiting the trust, although a senior member of staff reported that a family member had had their photograph taken with him at the trust sometime during the 1980s".
The board papers also noted a report received in 2013 from the mother of a patient: "The mother outlined that her child was treated for a broken arm on the children's ward at Guy's when they were 8 or 9 years of age; this would have placed the timeline of being the late 1970s or early 1980s.
"She outlined that she thought Jimmy Savile spoke to her on the children's ward at night and signed her son's plaster cast. The mother did not report or suggest that any allegation of abuse occurred at this time."
Separately, Southwark Council has published a report of an investigation of an allegation of abuse by Jimmy Savile at the Hollies children's home run by the authority in Sidcup.