{{{Immascared}}}
I think this is an excellent question! From the time I was diagnosed to before my SVR I let everyone know that was dealing with me that would stand the chance of infecting themselves and could consequently infect others: Hairdressers; Lab Technicians; Friends, Doctors, Dentists, Nurses, Medical Students, Hospitals, etc. Being 2 years SVR I still inform Doctors, Dentists, close friends and anyone around me that may at somtime have to deal with coming into contact with my blood. At times I have considered putting it on a medical bracelet I myself never quite knew how to put it down on medical history records and I believe Missy Mouse has given us a sane option of recording it.
Morally I have always thought it an obligation towards others to inform them; I don't feel responsible for the many years before I was diagnosed. For myself I would hope that doctors in particular would use the information as a guide to prescribing me drugs that might be easier on my Liver and be more intuned to issues such as Missy mentioned. Emkins makes a good point, also.
Ultimately it is your decision. I hope you get enough good imput here on this Thread to make a decision that you are comfortable with.
Many "Thanks" for Asking!.....

P.S. (It might also be wise to state how you contracted it if you know, especially if it wasn't due to drug use. I find that even professionals tend to assume it's from drug usage and that opens up a whole other can of worms.)