My preparation for both the CPC-H and CPC-P was a combination of work experience on those side, coupled with use of the study guides and additional independent study using personal resources.
Generally speaking, the study guides framed my endeavor. I used the information therein to research parts of the exams I was unfamiliar with or had no exposure to. You'd be surprised at how much "sheltering" can be done to a coder over the course of time.
In my area, there are plenty of physician-based coding prep academic and review courses, but nearly (and probably indeed) nothing for hospital or payer-based coders. On-the-job training is the best they might hope for. What's sad is that we have multiple coding programs available in the metro area, but few choices for coders interested in the hospital, payer or other environments.
It is possible to successfully complete the CPC-H and/or CPC-P through independent study. However, I believe the individual must want the credentials pretty badly to follow-through on the independent study. You might also look into pursuing a study group through your local chapter. Even if you can't necessarily gain a moderator out of it, you can network with those having similar interests and possibly get subject matter experts to assist now and again.
Good luck to you. I hope all works out well.
Kevin B. Shields, RHIT, CPCO, CCS, CPC, COC, CCS-P, CPC-P, CPC-I