medical helicopters

Over the weekend I was updating the agency page for this: https://www.radioreference.com/apps/db/?aid=2091 So, I clicked on the Wiki tab from that page and that Wiki had been created but was empty. I added information to it. It was then pointed out to me in a PM sent by another member that...

I live in Carmel and am wondering what frequencies to monitor to hear medical helicopter dispatches and traffic. Both IU and St. V.