The book by Kevin Byrne (published a couple of years ago I think) is called "Time did not stand still", and subtitled "A Revised History of St. Colman’s Hospital, Rathdrum, Co. Wicklow", so yes, what used to be the Rathdrum Workhouse became a hospital.
In the introductory section, it says: "Rathdrum was well known in Co. Wicklow as the site of the Workhouse, or as was it known ‘The County Home’. St. Colman’s is still known to the older generation as; The Home’. Today, however, it is the pride of Co. Wicklow, thanks to the work of Sister Philomena and the Sisters of the Poor Servants of the Mother of God, the staff and especially the community. Credit must also go to the Co. Council and Health Board who responded to the work of the volunteers.
"The Nuns first used the name St. Colman’s when they arrived in 1922 but it was not officially accepted until 1949."
Hope this is helpful.
Giuliana