Going into the field and getting your "feet wet" might be fascinating, but it won't help much.
One problem that I know of from 20 years as a masters-level CPA and healthcare executive is that physicians tend to grossly underestimate the complexity of healthcare administration and finance. A couple of business-oriented courses aren't going to get anyone ready to run a hospital - or a private practice. And while an MD/MBA is great training if you want to climb the ladder in administration - in my opinion (after half a lifetime of doing this), an MBA degree only qualifies you to go out and get experience in the business world. With no experience, an MBA is a rather weak qualification.
If I were going to teach a course for medical students or residents, I would focus on teaching the class some basic "facts of life." So many doctors I run into get into a rage over decisions made by a hospital or a group medical practice - and, when I talk to them further, it's because they really don't understand how the system works at all. I'd teach future doctors what makes money in a hospital and what doesn't. I'd teach them the difference between per-diem payments and case-based payments. I'd teach them about different reimbursement methods that affect physician reimbursement and physician contracting.
As a student or a young physician, you might want to be taught all the details about coding, billing, and reimbursement because you don't want to "feel helpless" and you "don't want to depend on anyone else" (I used to hear that a lot, too). I wouldn't attempt to teach that - it took me 20 years working full-time in healthcare administration to become an expert, and I couldn't teach it in one or two courses. Just doesn't work that way. Clinical medicine and healthcare administration are two totally separate career disciplines. I would simply try to teach physicians enough so that they might be able to develop relationships with more trust with the administrators and practice managers that - in the end - doctors have to depend apon.