The Irish Medical Organisation has said most doctors would see free GP care for all in five years as pie in the sky, unless it is properly costed.
Speaking at the union's annual conference in Galway, IMO President Dr John Duddy said it would be disappointing if the final report of the Oireachtas Committee on the Future of Healthcare does not provide costings and the funding system on the proposal.
Dr Duddy said that in principle the idea of free GP care for all is a good one.
But who would pay for it was the big issue, whether through general taxation, a health levy, or an increase health insurance premiums.
Dr Duddy said the cost would certainly be a seven-figure sum.
Meanwhile, the IMO has said the talks on a new GP contract, which have started with the Government, will be a long process.
The union said it involves a complex change to a contract first established in 1970.
Dr Brian Turner UCC, tells IMO agm, Ireland would need 2,800 extra doctors & 9,000 + extra hospital beds, to match OECD averages— Fergal Bowers (@FergalBowers) April 21, 2017
Dr Duddy said it would be nice to have a timescale for the negotiations, but they should not be limited either.
The union has today called for a major investment in the health system to end emergency department overcrowding and long waiting lists, especially given the rise in the population shown by recent census data.
Minister for Health Simon Harris will address the two-day conference tomorrow.
Delegates have passed a motion "to encourage doctors to take the necessary steps to educate and empower women to abstain from alcohol throughout pregnancy and breastfeeding, to prevent the occurrence of Foetal Alcohol Syndrome and Foetal Alcohol Spectrum Disorder."
Addressing the conference, Dr Mary O'Mahony, a specialist in public health medicine from the HSE South, said many cases of the disorder remain undiagnosed.
Dr O'Mahony, who also leads the regional EUROCAT register on birth defects, said children born with foetal alcohol syndrome are more likely to end up in the criminal justice system.