Hi, Chrissy!
I completed my undergrad at the University of Kentucky, and have looked into the grad program as well. I decided not to apply, but hopefully I can help you out a little.
First of all, you are correct. UK does put primary focus on health communications, as the school is very much known for its other health related programs and research. If you feel health comm could be for you, you're putting yourself in a great place. UK has national ranking (I've heard 3rd in the nation for health comm?), and there appears to be a LOT of money circulating because of the work done there. I spoke to a guy about the program, and he said they stress publishing and conferences over teaching and creative works, so if you're not looking to stay solely in academia, perhaps this could be the route for you.
Obviously, it is important to find a school of best fit, but it seems like applying your focus to this field could be a good decision in terms of future job potential.
Maybe let us know what particular angle you're interested in researching with interpersonal communication and CMC and we could help you out!