Ms Collins this morning asked ACC chief executive Ralph Stewart for the report, following revelations that details, including full names and details about individual claims, were emailed to a person who should not have had them.
The email's recipient told Fairfax that 250 of the claims are from the ACC's sensitive claims unit, which deals with sexual abuse or sexual assault injuries.
ACC's senior managers were reportedly informed about the breach three months ago but made no effort to investigate or ensure the information went no further.
A board member raised the issue at a higher board level, leading to a meeting between the email recipient and ACC management in December.
However, speaking to Radio New Zealand this morning, Mr Stewart appeared to be in the dark about whether information had been released, saying he "should know that by this morning or early afternoon''.
He was also unsure about the facts of a meeting with the email recipient.
"I'm working with the team in Auckland to find out what happened in that respect and whether it's factual or not, and expect to know that in the next couple of hours,'' he said.
A statement from ACC also yielded little detail about the alleged breach, saying only that the organisation took the privacy of its clients' information "extremely seriously'', and its first action was locating where the alleged information was and securing it.
Privacy lawyer John Edwards told APNZ that Privacy Commissioner Maree Shroff had the option to launch an investigation into such a breach, or ACC could invite her to do an audit of the organisation's privacy compliance.
Mr Edwards said it was hard to say what should be done until the full facts of the case were made clear.
"Certainly ACC should have taken this seriously right form the outset ... I would have thought that if that happened three months ago they should by now be in a position to tell us why that happened.''
ACC did not have a legal responsibility to notify people if their information had been released, although the Law Commission had recommended that the Privacy Act be amended to make that the case, Mr Edwards said.
"Certainly the Privacy Commissioner ... recommends that people be notified.''
The allegations have sparked calls for an independent inquiry, with Green Party ACC spokesman Kevin Hague expressing particular concern about ACC's apparent lack of action.
"It appears the ACC board and the minister have known about the privacy breaches for some time but have done nothing about them,'' he said.
"We need to know what the board knew, what the minister knew, and why they have not acted. Only an independent investigation can achieve that.''
Mr Hague said there appeared to be a "lax privacy culture'' in the organisation, which undermined the trust New Zealanders needed to have in the scheme.
He said claimants who had had details about sensitive claims released would need support and possibly compensation.
Labour's ACC spokesman Andrew Little said the breach, which he had learned of only this morning, was a "material'' issue that should have been raised when Mr Stewart and chairman John Judge appeared before Parliament's transport and industrial relations committee early last month.
"If they knew for three months, then this was an issue that ought to have been brought to the attention of the select committee.''
That it hadn't been brought up at the committee suggested "an attempt to conceal what is a material piece of information on ACC''.
"My biggest concern would be that the senior management of ACC knew about it for three months and didn't appear to have done anything about it.
Mr Little said that was consistent with what he perceived as a "culture of arrogance'' at the senior level of ACC.
