Labour said the ambulance figures confirm that cuts to social care funding are driving up the need for hospital attention among the elderly.
Shadow health secretary Andy Burnham said data in the House of Commons library shows that local authority spending on adult social care has been cut by £1.8bn since 2009/10.
He said: "These shocking figures expose the growing crisis in older people's care on David Cameron's watch.
"The Government's severe cuts to social care have left thousands of older people without the support they need - at risk of going into hospital and getting trapped there. It is one of the root causes of David Cameron's A&E crisis.
"It is appalling to think that every week there are thousands of frail and frightened people speeding through our towns and cities in the backs of ambulances to be left in a busy A&E."
Labour's shadow health secretary Andy Burnham has warned that the NHS could be "on the brink of a very dangerous winter" as A&E departments are increasingly overcrowded.
He was speaking as a new report by the National Audit Office finds that more people are being admitted to hospital through A&E departments than ever before, and that many of these admissions are avoidable.
Mr Burnham told Daybreak that older people are "drifting towards A&E in ever greater numbers" as care facilities in the community are taken away.
Labour's shadow health secretary Andy Burnham said: "We are in favour of improving the recovery of costs from people with no entitlement to NHS treatment.
"But it's hard not to conclude that this announcement is more about spin than substance. The Government's own report undermines their headline-grabbing figures, admitting they are based on old and incomplete data.
"Instead of grandstanding, the Government need to focus on delivering practical changes. Labour would not support changes that make doctors and nurses surrogate immigration officials."
The Department of Health has apologised to Labour's health spokesman Andy Burnham over the release of confidential emails he claims were used to smear him, ITV News has learnt.
The Health Secretary Jermey Hunt suggested in a tweet last week that the emails, published in the Daily Mail, showed his predecessor had attempted to cover up failures at the Basildon and Thurrock University Hospitals Trust.
Andy Burnham is considering legal action over what he claims was an unprecedented smear. Now, the Permanent Secretary at the Department of Health, Una O'Brien, has written to him saying they should have consulted him before releasing the emails.
"I am sorry that on this occasion, the protocol was not properly observed and I apologise both on behalf of the Department and the CQC for this lapse."
She goes on to say: "My investigations have revealed that this was a genuine oversight on the part of officials but nonetheless unacceptable."
Health Secretary Jeremy Hunt said he does not doubt Andy Burnham's "personal integrity" following a row over allegations his opposite number was involved in a hospital "cover up" when he was in office.
In a letter to the now shadow health secretary, Mr Hunt that he was "very surprised" to receive correspondence from Mr Burnham's lawyers and that his comment "was not a suggestion that you personally covered up evidence of poor care".
However he added, "I do believe that the previous Government, with you as the Secretary of State for Health, must acknowledge and take responsibility for these failures on your watch."
The Conservatives point to emails showing that the Department of Health under Labour tried to stop details emerging of a hospital scandal involving higher-than-normal death rates relating to relate to Basildon and Thurrock University Hospitals NHS Foundation Trust.
A Conservative health spokeswoman has said there was "overwhelming evidence that Labour ministers leant on the Care Quality Commission (CQC) watchdog" to "tone down and cover up NHS failure for political purposes".
However, Labour has asked Health Secretary, Jeremy Hunt, to substantiate his claims that Shadow Health Secretary Andy Burnham hid hospital failings in a "cover up".
"It is high time he (Mr Hunt) focused on his real job and the unfolding A&E crisis instead of orchestrating a smear campaign without evidence," a party spokesman said.
Here is a breakdown of what email data showing the Department of Health under the Labour government attempted to stop details emerging of a hospital scandal contained:
Emails released by the Care Quality Commission (CQC) watchdog under freedom of information laws showed the Department of Health ordered the CQC not to brief the press on an inspector's report into the trust, which found appalling standards of hygiene.
But by then the CQC had already told three national newspapers the report was impending and the story was being published by the Press Association.
The CQC report into Basildon detailed major concerns about unusually high death rate among patients.
Inspectors found blood stains on floors and curtains, blood splattered on trays used to carry equipment and badly soiled mattresses in the A&E department with stains soaked through.
New email data showing the Department of Health under the Labour government attempted to stop details emerging of a hospital scandal makes Andy Burnham's position as Shadow Health Secretary "untenable", according to the Tory MP who instigated the release of the details.