Leo Varatharajan will undergo a spinal cord surgery on Thursday, he confirmed.
The Taoiseacht leader confirmed to reporters he was undergoing the operation in a hospital in Limerick.
His spokesman said the operation was to treat the injury sustained during the crash.
Mr Varadaram was flown to Limerick from a US hospital on Thursday afternoon and was in a stable condition.
The party has been struggling to find a way forward in the run-up to the general election.
The Government has repeatedly refused to provide any details on the condition of Mr Varadarajahans recovery.
The former Fine Gael minister had been diagnosed with a spinal injury in February 2016 and is now in a rehabilitation unit.
He was placed in a medically induced coma and his condition deteriorated.