The AMA has been campaigning for a new hospital to be built on a greenfields site.

Dr Aizen said that while he was pleased funding had been secured for the hospital, the Coalition's $1 billion offer would have been preferable to the $340 million from Labor that Mr Wilkie accepted.

Mr Wilkie said he rejected the Coalition's offer because he had concerns about where the money would come from, but Dr Aizen said the Coalition had disagreed with Labor's GP super clinic plan and some other health plans, which, if scrapped, could have funded the hospital promise.

Mr Wilkie yesterday described Labor's package - which also included a promise to open a new round of a federal health infrastructure fund - as more responsible.

"He (Opposition Leader Tony Abbott) simply offered me $1 billion, no strings attached, no discussion or where it was going to come from, no discussion of the proper process," he said.

But Opposition treasury spokesman Joe Hockey told ABC Radio that Mr Wilkie did not ask where the money would come from.

"We'd be happy to do it (explain it), but he didn't ask. It was an offer," he said.

Tasmanian Premier David Bartlett said the state government - which allocated $100 million in this year's state budget for RHH upgrades - was committed to working with the federal government to refurbish the hospital.

"I provided for Andrew Wilkie a comprehensive briefing on the policy that Labor and the state took to the state election and have been getting on with to make sure that we can renew the Royal Hobart Hospital," he said.

Opposition health spokesman Jeremy Rockliff was critical of Mr Wilkie's decision to reject the Coalition's $1 billion offer.

"State Labor's election promise was a $565 million redevelopment, to be funded 60 per cent by the Commonwealth, and 40 per cent by the state," he said.

"If federal Labor (does) provide the full $340 million, a balance of $225 million remains, of which there is just $65 million across the forward estimates of state government funding."