A survey of Chartered Society of Physiotherapy members revealed more than half believe patient care will suffer under the government’s reforms.
Fifty-eight per cent of the 1,100 members polled said they “strongly agree” with the statement, with a further 32 per cent agreeing.
Ministers are in the middle of a “listening exercise” on the Health Bill after opposition from unions, charities and some royal colleges.
In the CSP poll, 81 per cent said they opposed the bill, and the same proportion believed making NHS services compete will not improve patient care.
CSP chief executive Phil Gray said: “These results should serve as yet another warning to Andrew Lansley that he is on the wrong track with his proposals.
“Physiotherapists are concerned that this reorganisation, which is unprecedented in size and scale, will have devastating consequences for patients.
“At a time when the NHS is already under huge financial strain, these proposals cannot be allowed to go ahead without major changes to the bill.”
Nearly three-quarters (74 per cent) of physiotherapists surveyed said they had seen services rationed or cuts in quality following financial cuts.