They can screen you for communicable disease as part of a pre-employment physical, and probably will. Not all places do comprehensive screening, it is expensive. My present job limited the screening to TB gold. I didn't even have to provide a UDS! I just had to agree (in writing) to do so on demand if ever asked. I have had to give vials of blood for more comprehensive screening in the past, including being tested for HIV, titers for hepatitis B, rubella, varicella, and I cannot even recall what else. I cannot predict if they will rescind a job offer due to +HCV. I suspect there are areas that probably would: L&D, NICU, peds, surgery. Do you like behavioral heath? They probably wouldn't care. Lots of other places probably would not. I think they would keep you away from laboring women and infants, and out of the OR. Not because you are an actual threat to those patients, but because there is enough litigation stemming from those areas already, lol.