The medical director of NHS England, Sir Bruce Keogh, will give evidence to MPs today about pressure on emergency services.
The hearing comes after one NHS trust admitted downgrading thousands of 999 calls without permission from senior management.
The East of England Ambulance Service released an internal report showing that 57 patients died after having their 999 calls downgraded leading ambulances to either arrive late at the scene or not turn up at all.
Yesterday, shadow health secretary Andy Burnham raised the case in the House of Commons, claiming that some of the downgraded calls were on behalf of terminally ill patients.
Health Secretary Jeremy Hunt said the East of England ambulance service has received £3.6 million of extra support this winter and defended the record of ambulance services nationwide.
Andy Burnham has said that Labour would combine the health and social services budgets to try and care for the elderly in their homes before they become a burden on the NHS.
The shadow health secretary told Good Morning Britain: "I've repeatedly warned that if you cut social care, if you take away support from older people in their homes; in the end that falls back on the NHS because people go into hospital and they become trapped there. "I've said that we'll bring health and social care together I think the time has come to see them as one budget."
Labour's shadow health secretary Andy Burnham has said that today's five-year forecast for the NHS "endorses key planks of Labour's plan".
He said he agrees with the report's finding that primary care has been under-resourced and called on the government to stop cuts to the budget for GPs.
Mr Burnham also noted that the report "does not give one mention to competition" and says the Coalition should review its competition rules.
While the Health Secretary denied that the report endorses Labour's vision, he said there were large parts of it that Labour and the Conservatives "can agree on".
Shadow health secretary Andy Burnham said that as a politician you must "always plan for the worst", and "that is what Jeremy Hunt is doing" with Ebola screening.
Burham told Good Morning Britain there would be "no point scoring" on the issue, but that he would ask "challenging questions".
Labour's attempts to block clause 119 of the care bill, which would give ministers greater power to close down hospitals, is "irresponsible scaremongering of the worst kind".
A Conservative Party spokesman said:
Labour has accused the Government of neglecting the NHS' first responsibility to clinical care and instead, having a financial focus when making changes to hospitals.
Shadow Health Secretary Andy Burnham said:
Labour is appealing for Tory and Liberal Democrat MPs to help block measures it says will give ministers sweeping powers to close hospitals.
Shadow health secretary Andy Burnham said clause 119 of the Care Bill - due to be debated in the Commons today - would allow Jeremy Hunt to "ride roughshod" over local residents' concerns.
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.