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>He would have died much earlier if he was living in the US because he did not have the money to pay healthcare.

You don't know that for certain. Medicare is not only provided to patients over age 65, but also those who have end-stage kidney disease or those designated as disabled by the Social Security Administration.

In 1972, Congress passed legislation making people of any age with permanent kidney failure eligible for Medicare, a program that helps people over 65 and people with disabilities pay for medical care, usually up to 80 percent. Other public and private resources can help with the remaining 20 percent. Your dialysis or transplant center has a social worker who can help you locate and apply for financial assistance

http://kidney.niddk.nih.gov/kudiseases/pubs/financialhelp/