You need to talk to whoever is over the hospitalists, as well as the hospital.
Handoffs are a major issue and should be taken seriously. They should have made sure they contacted you and gave you all the information. The fact that you are out of the loop in any way is NOT acceptable.
My suspicion is the other 6 physicians just looked at the name and said "not my patient" and ignored it. I wonder if they are the hospitalist group or why would they be getting the labs?