Healthcare Effectiveness Data and Information Set (HEDIS) is a tool health plans to measure health care performance. Unless someone paid to train you with qualifying experience, it's probably out of reach.
Sounds like your basics are knocked out for RN (chemistry, microbio, A&P 1&2, HGD, Foundations, Pharm, etc,,) so it would probably be best to complete your clinical semesters instead of reworking the RT route just yet.
3 years as an LPN in the LTC, Rehab, and Corrections should more than prepare you for clinical. Pt safety, ABCs, ADPIE, Maslow's Hierarchy, and critical medications.
I think the MD office will be a welcomed change. Best of luck.