I know CGM from medico...their KIS is a nightmare. We have to communicate with it in hospitals. What an ugly monster and somehow no hospital IT is able to admin it properly.
Which of their products are you considering?
What Data Warehouse software do you write for RIS? Maybe I can use it :D
...and yeah Radiology communities are rare. I'm still looking for one...if I have time.
The DWH software writes snapshots of db_direct into a temporal DB (implemented in Postgres using multiranges) and then uses dbt to transform the data into usable tables. Right now, I use Power BI for visualisation and reporting.
However it's good for usual Doctors offices. It's terrible for Radiology Planning. Also many institutions just put a link to their homepage or phone number in there. This way they're on DL but don't have to deal with the calendar.