Independent Wexford TD Dr Liam Twomey is understood to have agreed to join the Fine Gael Party.
Party leader Mr Enda Kenny is expected to make the announcement tomorrow at a press conference which has been called to announce details of the party's annual two-day parliamentary party meeting in Kilkenny
Dr Twomey would bring Fine Gael's Dail seat tally to 32.
The Fine Gael MEP and former Wexford TD Ms Avril Doyle today said she hoped the reports that Dr Twomey was to join were true, and that she "would welcome Liam Twomey into our parliamentary party".
Dr Twomey (37) was elected as an independent TD at the last General Election, having campaigned on a platform of improving the health services.
He took a Fine Gael seat, reducing the main opposition party to just one seat for the first time since Wexford moved from being a four-seat to a five-seat constituency in 1977.