The HSE is to be brought before the Public Accounts Committee to explain how a Hepatitis C lobby Group allegedly misspent public money.
An HSE audit found that Positive Action received over €2m in public funding since 2009, but collapsed earlier this year with debts of over €100,000
In September 2013, officers at Pearse Street Garda station were asked to investigate the alleged misuse of public money by the group.
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PAC chairman John McGuinness says how the money was spent needs to be accounted for.
"The amounts of money that were spent and how that money was spent now needs to be accounted for," he said.
"I understand that the accounts were not properly audited, so the HSE will be called before the Public Accounts Committee to determine just exactly what went wrong here, and how taxpayers' money was spent."