No, I may be wrong. But, logistically I don't see the difference.
I was asking because I thought I could offer some ideas. Sure, a VoIP phone system may be difficult to put in, but if you have VoIP you can plug the phone in at home and it would be like being in the office. Yes blood pressures and blood draws and shots are hard from home but then you could be at home. Or they could be scheduled three days a week.
Of course, you wouldn't them to know your cell pone or home phone. Just an idea to limit your exposures.