Pin Location on the Map is incorrect

It's not possible to override the pin position because it's based on what Google provides as the location-based on the address. 

This is an issue with Google Maps, it's actually best to correct the root issue there.  This will also correct the pin location in other apps and services that use Google Maps, so it's the recommended approach.
 
Just search Google Maps for your address, then click "Suggest an Edit" and follow the prompts.  Once Google applies this update, then in Noterro edit your location and just save it again as is.  This will trigger an update to your map icon location and automatically update your clinic-branded app.