On July 25 - almost a month later than normal - CMS released outpatient rulemaking for CY2019. Public comment is open for 60 days (September 24, 2018).
The CMS homepage for the rulemaking is here. The CMS press release is here. For a deeper dive see the "Fact Sheet" here.
The Federal Register home page (includes comment link) is here and the actual rule is here (83 Fed Reg 37046-37240, 195pp, July 31, 2018).
Read a speech presented on the same day by Seema Verma to the California Commonwealth Club, here.