not in my case though...
because my surgeon doctor was college professor at UofAz but he has transferred to UofMich a year after my surgery. (actually he got transferred back there). He didn't get my $$ because college only pay his salary. my insurance pay the UofAz's Medical Center for operation and CI and usage of equipments. 
why you claim differently?
Advanced Bionic is not on stock market before bought by Boston Scientific which has listing on Stock Market.
Cochlear Corporation has listing on stock market in Australia not USA.
I don't know about MedEL since it is based in europe.
As for Cochlear Corp. the profits from stock market are funneled into improvement and researches. That's why we are seeing newer advances in technology of CI and advances in speech processing softwares.
I am sure same can be said for other two companies. They are not like Oil Company where they profit from sales of gas using Oil from foreign country instead of from their own.
