Under the pontificate of Pope John Paul II, she was beatified in 1980 and canonized by Pope Benedict XVI at Saint Peter's Basilica on 21 October 2012. Various miracles and supernatural events are attributed to her intercession.
On December 19, 2011, Pope Benedict XVI approved the second miracle needed for Kateri's canonization. The authorized miracle dates from 2006, when a young boy in Washington state survived a severe flesh-eating bacterium. Doctors had been unable to stop the progress of the disease by surgery and advised his parents he was likely to die. The boy received the sacrament of Anointing of the Sick from a Catholic priest. As the boy is half Lummi Indian, the parents said they prayed to Tekakwitha for divine intercession, as did their family and friends, and an extended network contacted through their son's classmates. Sister Kateri Mitchell visited the boy's bedside and placed a relic of Tekakwitha, a bone fragment, against his body and prayed together with his parents.The next day, the infection stopped its progression.