The problem I see with this service, at least in the US with the litigious nature of its society, is that it's almost to the point that if you say a common housefly landed on your arm and you are worried they will tell you to come in to the ER or urgent care. I know of no one who has called any level of their heath provider with any concern who has not been told to come in.
The last thing they want is for someone to call in with something seemly trivial and have it turn out to be something quite serious. That's a lawsuit waiting to happen when "I called my doctor and he said I was fine." and then "My doctor said I'm fine but then I lost a limb.".