October 2nd is 90 days from the end of the year, which means that if you want credit for partially reporting MIPS data, you need to start with data from patient visits on that date. If you still don't understand MIPS, check out this free webinar here, or more advanced training available for purchase here.
MIPS is a program that allows Medicare to collect data from providers about high quality low cost care that uses technology effectively. There are four categories and providers need to learn about the available measures so that they can pick the ones that make them look the best.
This is really just another step towards a whole new way to reimburse providers based upon the outcomes and quality of care rather than number of services billed. If you want to stay relevant in the world of healthcare reimbursement you need to know how to convey that you are worth paying and that you're getting patients better.