Is it worth registering for an innovations in medicine conference, being a CE student?
Full disclosure: I originally planned to go to medical school, but things happened and I received an MS in CS instead.

The question on whether you should attend weighs heavily on something you haven't clearly specified: how serious is medicine for you?

If you're just "Oh, I might do something medically related and want to attend" feel free to attend. However, unless you're actually studying biology or other related medical topics, this conference will not provide you very much besides being a CV stuffer. 

Both medicine and CS alone are full-time education paths. If you're learning 10 CS courses for 1 intro to biology course, then I would say medicine is not really an associated topic of study. I would say, at the very least, you should have enough credits to have a minor in Biology or some other medically related field to indicate an actual understanding of the medical field.

If you are super-interested in the topic of medicine and feel that "Yes, this is what I want to do," then this is a program you should attend. You will meet people, make connections, and possibly end up doing research with them. The conference is a source of opportunities. You have to back up that dedication with actually learning biology, chemistry, and physiology. Like any set of study, learning medicine is a commitment.

That being said, medicine and computer science together tends to be more towards the Bio-Medical Engineering field. Or Bioinformatics, both of which are graduate-level programs as well. Plenty of things in these fields, like robo-surgery or automated diagnosis, and all great research-friendly topics. Electronic medical records software and clinical trials software, however, medical knowledge is usually not required and can be provided by people trained in the medical field.