Can I have two different blood tests from two different doctors done on the same day?

yes you can do as many blood tests are you need. I'm not sure if belong to a HMO or a hospital group.. Most of the time there is one lab you go to and they will take you blood. You might has to ask the nurses where you willl have to go to get your blood testbed done. If they are at different places try and see if you can get them to be done at the same place.