The poll was of 150 MPs by ComRes on behalf of BMI Healthcare, which is owned by the General Healthcare Group.
It found that 42% of MPs born after 1960 agree that the current NHS model of care is sustainable. The result was 72% for MPs born before 1950.
There is also a regional split, with 82% of northern MPs believing it is sustainable compared with 52% in the south.
Andrew Hawkins, chief executive of ComRes, said: ‘Given that we expect a relatively high turnover of MPs at the next general election, perhaps more than a third of the house, we should expect that the direction of travel for the house is towards more support for private sector involvement in the health service.'
Do you think the current NHS model is sustainable?
More news from 25 August