Don’t wait until the person is very close to death and can no longer receive Communion or make a confession or pray along! As soon as any serious illness is discovered, the sick person can be anointed to receive strength from God and even physical healing from that condition.
In addition, anytime a person needs a medical procedure that involves any risk of mortality (including general anesthesia), that person should receive this sacrament. We also recognize that severe mental health distress such as depression or anxiety or suicidal thoughts constitute a condition that threathens the life of the person.
Finally, elderly Catholics can and should receive this sacrament from time to time.