The Scally Review into the CervicalCheck screening programme cost more than €1 million.
This includes payments to lawyers, a communications agency and doctors.
The Scoping Inquiry into the CervicalCheck was set up in May 2018 after the legal case involving Vicky Phelan, who received €2.5 million over an incorrect smear test.
After follow-up work was complete - including a supplementary report - Dr Gabriel Scally's inquiry finished in June 2019.
Documents released to Newstalk under the Freedom of Information Act show the total cost of the project was just over €1 million including VAT.
Gabriel Scally Consultants Limited has submitted five invoices to the Department of Health, related to the initial report and supplementary work.
They include fees of €145,000 to Dr Scally personally, €58,000 for legal advice and €43,000 for work carried out by Q4PR, a communications agency.
The Crowe consulting team helped with logistical, project-management and other support work during the review - its costs came to just over €400,000.
