Completing an NP program with Supplemental Classes

I’ve never even heard of a school that offers additional pathophys classes. Some schools will allow you to take additional courses provided you pay the extra tuition however I think there would be less benefit than you might imagine. Instead, it would probably give you a better education and be much more cost effective if you do additional reading on topics you’re interested in. Look at course syllabi which often list recommended or additional resources such as books or journal articles. Ask professors in courses you are interested in for suggestions of additional articles on topics of interest. Check the references in your textbooks for additional depth on topics you want to learn more about.  Consider picking up additional books such as those used in medical schools on topics you really want to go into depth on. All of these things will likely give you more quality information that additional course work, can be better tailored to topics of interest or areas of weakness you want to increase you knowledge in, and are more valuable lifelong learning skills to develop than continuing coursework. 

There are many resources outside of classwork itself that you can find online. There are sites like medgeeks, there are Youtube medical series, there are supplemental continuing education programs and as already mentioned, the texts that you have will include primary reference information. Good luck finding what you will need!