I am a medical assistant/EMT and a year away from finishing a B.S. in computer info systems and I decided to pursue medicine. My question is should I get a second bachelors in something like biomedical engineering or just do the sciences I am missing and apply with the CIS degree?
Also I heard med schools look down upon community college credits? Is that true?
Honestly, the best thing to do is go ahead and finish out your major. Many schools are going to require you to have a Bachelor's Degree. You've nearly gotten yours so stick with it.
You do not need to get a secondary degree in a science related field in order to go to medical school. You should major in the field you're interested in - do not major in something just because you believe that's what medical schools want to see.
You're going to need two years of Science coursework to satisfy the pre-medicine requirements. General Biology I/II, General Chem I/II, Physics I/II, and Organic Chemistry I/II. Some schools ask for social sciences courses, english courses, and mathematics courses. Given your major, I'm sure your mathematics courses are taken care of.
You may consider doing a post-bacc upon completion of your Bachelor's Degree. This will allow you to take the prerequisite courses for medical school and also some upper level courses to prepare you for medical school. Look for post-bacc programs at institutions which are of interest to you for medical school. I.E., if you're interested in attending your state university for medical school, see if they have a post-bacc program. If so, many programs often offer guaranteed interviews upon successful completion of the post-bacc program.
Of course, a post-bacc isn't necessary, and you can complete the coursework on your own.
Hope that helps!