Levy Izhak Rosenbaum, 58, ran the Brooklyn branch of Kav Lachayim, a volunteer group that purports to help sickly children.
Before Madoff was busted as one of the biggest scammers in history, his $19 million family foundation donated tens of thousands of dollars over several years to the charitable group, records show.
Rosenbaum was arrested last week as part of a massive FBI sting after allegedly being caught on tape offering to sell a kidney for $160,000.
“I am what you call a matchmaker,” Rosenbaum told an FBI informant trying to broker a deal.
Rosenbaum said he had brokered “quite a lot” of illegal organ deals, according to a criminal complaint.
The charity’s sister organization in Israel also has ties to the selling of organs. That group was partially run by a retired banker, Yechiel Landman, who a year ago helped sick Israelis find organ donors in the Philippines, according to reports.