By the sacred anointing of the sick and the prayer of the priests the whole Church commends those who are ill to the suffering and glorified Lord, that he may raise them up and save them and indeed she exhorts them to contribute to the good of the People of God by freely uniting themselves to the Passion and death of Christ.
Catechism of the Catholic Church 1499
The Sacrament is given to seriously ill Catholics by calling the Rectory and arranging for this by appointment or whenever there is an emergency. Parishioners scheduled to undergo surgery should contact one of the priests so that they may be anointed before their medical procedure. This can also be done at Church when you come to Mass.