Raising almost a billion US$ in 2016? It seems like a lot for what boils down to "advertising in doctor's offices". Would be interesting to know who the VCs were.
You can find most VC investments on CrunchBase. In this case the most recent funding was primarily from PE rather than VC, which is a little different.
Pushing drugs and procedures and insurance on people you know are already sick and probably desperate is peak ad-tech.