The Health Minister, Wicklow T.D. Simon Harris and the HSE boss Paul Reid will be questioned by TDs and senators later this morning.
When Mr. Reid took over at the HSE earlier this year, he said he planned to wipe out the organisation's deficit of 103 million euro.
Instead he's set to tell the Oireachtas Joint Committee on Health that the figure has now grown to 281 million euro.
Dr. Michael Harty, Chairman of the Committee, says the health system is a money pit that's failing patients.