What age is too old for transplant?

Usually 70-75: At least for a liver transplant, usually 70-75. More importantly is the absence of other medical conditions. So, if a patient has liver failure without diabetes, hypertension, heart disease, or kidney disease, programs are more likely to consider them for a transplant. I believe this also generally true for other organs as well.

No fixed age: It is hard to fix on a number because there are broad differences between two individuals. It is better to categorize the physiological age rather than the chronological age of a patient. The question to really ask is "does the risk of transplanting a solid organ outweigh the benefit of receiving that organ?" the answer can be subjective and viewed differently among professionals.

Rare after 75: Based on US Renal Data System registry (www.usrds.org) only 0.4% of 53,000 patients starting dialysis received a kidney transplant. For age 65-74 3.8% of 50,000 starting dialysis received a transplant. Most of the latter group were under 70. Age related medical problems especially cardiovascular disease, cancer, or infections are the contraindications for transplant rather than age itself.