Up to 6 thousand women who had a smear test carried out by CervicalCheck are to be called back for re-testing.
It's after a problem arose in one of its laboratories which could lead to a risk of abnormalities being missed.
Quest Laboratories which conducts screening of smears, advised CervicalCheck of a specific problem in relation to standard HPV tests that have been carried out outside of the manufacturer's recommended timeframe.
HPV testing is an extra form of screening carried out on samples where low-grade abnormalities have been detected by the lab.
The results of the test determine whether or not a woman will need a referral.
The HSE says action is being taken to investigate the issue fully and review any clinical impact or risk.
They have assured that this issue poses little risk to women's health and that Evidence shows that HPV tests of this kind are effective outside the manufacturer's recommended timeframe
CervicalCheck expects to be able to contact the women affeted by the end of next week
It comes after the Dail heard yesterday that waiting times for cervical smear tests were at crisis levels.
It was also announced that the state would fund the costs associated with the drug Pembro for cervical cancer patients who doctors deem suitable for treatment.