The Health Service Executive has reported a deficit to the end of March of €91m.
It compares with a deficit of over €58m to the end of February.
A large part of the overspend is on demand-led schemes, State clams and pensions, according to its latest performance report.
There were 405,000 patients waiting to be seen at an outpatient clinic, and 61,668 adults and 6,700 children waiting for day case, or inpatient treatment.
Inpatient admissions and outpatient attendances were up on the February figures.
Minister for Health Leo Varadkar said that while waiting times continue to worsen, the figures indicate that hospitals are starting to catch up on procedures that were cancelled in the busy January period.
