360Dx, the sister publication of Genomeweb, reports that Senator Grassley's office has issued CMS a detailed letter asking CMS to follow up on weaknesses in the Clinical Laboratory Fee Schedule triggered by panel unbundling. 360Dx here, Grassley January 2019 PDF here.
In part, the Grassley letter to CMS follows up on a November 2018 GAO report on the same topic, here. In January 2019, ACLA characterized the GAO's report as "fundamentally flawed" - here.
I wrote about the pending issue in November 2017, here.
The GAO report in November 2018 used some graphics very similar to those I had used in November 2017.
In July 2018, the House, but not the Senate, issued a request to CMS to report on the lab test unbundling issue, here.
See timeline here (click to enlarge):