And apparently it is $250 when the pump is donated. Medically approved pumps are expensive. A lot of the safety control is in that pump and the protocol used to

And apparently it is $250 when the pump is donated. Medically approved pumps are expensive. A lot of the safety control is in that pump and the protocol used to control it. It probably has two way confirmations at every step. Physical safety stops and controls. If you exclude the critical safety component (the pump) from the cost then it will be $250. That pump, with the safety controls and rigorous firmware development needed to pump insulin safely, is probably $4k-5k of the cost of the $7000 commercial pump. Also probably the reason there haven't been reports of people dying from their diy closed loop insulin pumps.