At least 120 individual State bodies can potentially get access to the information on the controversial Public Services Cards (PSCs), more than double the number indicated by Social Protection Minister Regina Doherty.
Fifteen Government ministers, Revenue, Irish Water, and the HSE are among a string of bodies that can request permission to access the data, according to the legislation.
Last night, the Data Protection Commissioner demanded the Department of Social Protection publish clear information on what data is being collected, for what purpose, and with whom it may be shared.
Meanwhile, Fianna Fáil TD Willie O'Dea clashed with the Government over alleged bonus payments of €5 for every PSC issued by Social Protection officials.
The Government has struggled to contain the storm that has arisen over PSCs since it emerged that a woman in her 70s was denied pension payments after refusing to register for the card.
Civil liberties campaigners have raised concern over privacy and data security.
During an RTÉ Radio interview, Ms Doherty defended the PSCs, saying there's no plan to further expand the information they hold and insisting they are a simply way of verifying a person's identity "to the highest possible standard".
"We will share that information with the 50 or so other bodies that are in the legislation since 2013 to give an improved, effective and enhanced public service," she added.
However, a section of the legislation previously sent to the Irish Independent by the Department of Social Protection listed "specified bodies" that can potentially access information linked to the cards.
The list includes categories of groups of State agencies that when analysed amount to more than 120 organisations. While "a local authority" is listed as one entry, within that category there are 31 county and city councils.
Similarly, "an education and training board" is another category. There are 16 of these around the country.
The department was asked to provide a list of which of the more than 120 organisations have actually been granted permission to access the PSC information and the reasons why. It did not answer that question last night.
However, a department statement argued that Ms Doherty's remarks on RTÉ relating to "up to 50 specified bodies" is "correct".
They said there are 47 "categories of specified bodies" and that "some are multiple-body categories". They gave examples including ministers, local authorities, and education and training boards.
The statement added: "The department always refers to categories of public bodies in any statements".
The department also addressed Mr O'Dea's remarks over alleged bonus payments to incentivise the issuing of PSCs.
Mr O'Dea said he has been told staff issuing the cards must first undergo a week-long training course.
"As the department... keeps tabs on how many cards are issued in each centre, the funds to pay the bonus are sent on to each local branch manager to make the bonus payments to staff," Mr O'Dea said.
The department denied "bonus payments" are made to its staff "in relation to the Public Services Card or any other service". The statement added: "The department has contracts with branch offices where branch offices are paid on a transactional fee basis for a range of social protection services including processing jobseekers, lone parents and PSC applications."
Last night a statement on behalf of the Data Protection Commissioner, Helen Dixon, said there is a "pressing need" for updated, clearer and more detailed information in relation to the mandatory use of the PSCs for accessing public services.
'Mandatory but not compulsory". This ill-judged hair-splitting seems likely to stick to Social Protection Minister Regina Doherty in the same way that "an Irish solution to an Irish problem" and "on mature recollection" did to politicians before her.
The announcement that Irish citizens will need a Public Service Card to obtain a passport or driving licence raises concerns about transparency and mass data sharing, a security expert said today.