Auditor-General Lyn Provost is to investigate the ACC board's handling of claimant and former National Party insider Bronwyn Pullar's claim.
Ms Provost's inquiry is the second major inquiry into matters around the handling of Ms Pullar's claim and the massive breach of privacy that occurred when the corporation mistakenly sent her the details of 6700 other claimants in August.
ACC became aware of the breach only in December when Ms Pullar met senior managers in a meeting brokered by chairman John Judge following Ms Pullar's approach to board member and old friend John McCliskie.
Ms Provost said that approach and how it was subsequently handled would be the focus of the inquiry along with, "how ACC manages a range of risks at the board level of the organisation''.
The Privacy Commission has already initiated an investigation into the major privacy breach and ACC's wider privacy procedures and policies which will be conducted by KPMG and former Australian privacy commissioner Malcolm Crompton.
The police are also investigating Ms Pullar's alleged attempt to secure a two year guaranteed benefit from ACC in exchange for the return of the other claimants' details during the December meeting.
Ms Provost said she also intended to develop an audit proposal on ACC's general operations, with a focus on case management, for the office's work programme in 2013/14.
Labour ACC spokesman Andrew Little, who had called for the inquiry, said it was an opportunity to examine the "real problems plaguing the agency''.
He hoped it would be widened to look into the conduct of ministers who may have been involved in the case.
"We must be able to have trust and confidence in ACC and be reassured that every client is treated equally. At the moment, it is easy to see how New Zealanders could have gained the impression from the Bronwyn Pullar saga that if you know someone from the National Party, you'll be treated differently.''
