This has not yet been finalized, so there is no telling what the new threshold will be - if it is, in fact, changed. That said, my bet is on 50 (because I am a pessimist at heart)... but that is purely a guess.
The original proposal had a tentative effective date as of 1/1/2020, so I believe 2019 data will still need to be submitted. (Anything could happen with the final rule, but I would absolutely plan to submit the 2019 data, as an effective date of 1/1/2020 would typically mean you don't have to collect and report 2020 data.)
Adam Witmer, CRCM
All statements are my opinion, not those of my employer, and should not be taken as legal advice.www.compliancecohort.com