The Guardian published extracts from a slideshow presentation produced for the H5 Private Healthcare Alliance, which stated that people believe the NHS provides good healthcare, though they believe it was "too bureaucratic with long waiting lists".
Crosby Textor advised its client that 63% of those questioned in a poll conducted for the presentation believed that "going private frees up the NHS waiting list".
The paper said the presentation was made by Crosby Textor, known as CTF Partners in Britain, towards the end of 2010, just months before the Health and Social Care Bill was given its second reading in the House of Commons in January 2011.
More top news
West Ham's dramatic FA Cup win over Liverpool will go down as one of the club's greatest ever games, says Slaven Bilic.
Scotland will see a mixture of sunshine and showers today, with some showers turning wintry in places.
Two men seen as alternative voices to the US political establishment have won decisive victories in the New Hampshire presidential primary.