Welcome to perhaps the next broadest category past 'customer service'.
The biggest suggestion I can give, without knowing more specifics, is med terminology if you are planning on dealing with the records directly. Probably my biggest regret is clepping outta that course in terms of my schooling.Beyond that, learn the acronyms (and there are quite a few), and learn how to derive the different formulae, rather than just memorizing that this = this.
Greetings Sarah, and congratulations.
As a bit of background, I didn't have a particular goal other than wanting a career, instead of a job. I was hired into the field doing ROI (Release of Information) specifically for continuation of care, and personal requests. I moved from there to a more general HIM role. So, while not directly pushed in a direction, I ended up going in one. Now I do ROI, as well as some QA work in scanning documents into the EMR, making sure they are in the right chart with right labels attached to the right encounters. I've not directly dealt with physician deficiencies (such as not signing a note yet, writing the note yet) or MPI issues, though I have had to deal with them in a tangential way (often by passing message along or setting a release aside temporarily). I have not worked as a coder/auditor, so I have very limited experience with that.
Things that have given me trouble? Well, the sites and skills you learned in researching for classes are still useful. I learned a site that gave very good definitions of lab tests, for instance, I used quite a bit at first, until I learned more during the job, and the specific EMR. Different EMR's give slightly different labels to similar thing, such as a heart catheterization. Remember you aren't done learning, is always more to learn. Don't be afraid to make notes, cheat sheets, or ask questions. If things work well, HIM (and healthcare as a whole) should work together to achieve the goal. I've been incredibly fortunate in that, as I haven't had to deal with a lot of politicing that can come about in a department (remember strong politics when I worked retail, for instance) and I've had reasonable, intelligent managers.Thinking about it, I've realized that nuance is my biggest frustration. So many things are similar, but very different. From what I remember, this was also an issue in the classes I had on coding, too.Hope that helps give a glimpse into a part of HIM as I see it.