Any ideas on grad school?

Sounds like you are asking all the right questions of yourself. I would humbly suggest you not pursue a degree in a technical career (e.g., dentistry or PA) unless you are 100% committed to that as your career path. You could end up feeling like the degree was a waste of your time if you realize that isn't where your passion lies.

In my experience, an MBA is a strong, all-around graduate degree. And there are certainly programs where you can integrate science and healthcare.

I still think it makes sense to ask yourself why you want a graduate degree at all. I've known successful CEOs who had only a high school diploma! I earned my degrees to give me a credential that would open doors - and it definitely worked. I also gained valuable skills that I still use 22 years after finishing my graduate studies. I also have lifelong friends from my graduate programs.

Are you looking for advice on which grad school to go for your chosen field, or whether you should go to graduate school at all?

I earned two degrees - Community Organizing and Public Health - from Boston University. While I use the skills and values I learned every day in my job, I wouldn't say I'm working as a Public Health Social Worker today. In fact, I got burned out pretty quickly after spending four years in grad school. This is particularly important if you are paying for it yourself or with the help of loans.

If you are trying to decide if you should go to graduate school at all, my recommendation is that you seek some job experience before to figure out (a) what you really want to do/achieve through your work, and (b) what skills you need to get there. From there, it might be easier to decide if graduate school is the answer. If it is, you might have some direction now.