Paul, an ophthalmologist, said the operation is related to an injury in 2017 when his neighbor, Rene Boucher, attacked him while Paul was mowing his lawn. The incident left Kentucky's junior senator with six broken ribs and a bruised lung. 

He is scheduled to have the outpatient operation at the privately adminstered Shouldice Hernia Hospital in Thornhill, Ontario during the week of Jan. 21, according to documents from Paul's civil lawsuit against Boucher filed in Warren Circuit Court. 

The procedure is estimated to cost anywhere from $5,000 to $8,000, according to court documents. MDsave.com lists a hernia repair costing between $4,000 and $8,000.

Shouldice Hernia Hospital markets itself as "the global leader in non-mesh hernia repair," according to the clinic's website.