Fact sheet
Approximately 8.3 million people selected or were automatically re-enrolled in plans using the HealthCare.gov platform during the 2020 open enrollment period. 
Fact sheet
Market Saturation and Utilization Data Tool was developed to allow the Centers for Medicare & Medicaid Services (CMS) to monitor market saturation as a means to help prevent potential fraud, waste, and abuse (FWA).
Press release

HHS, Labor and Treasury Departments Extend Comment Period for Transparency in Coverage Proposed Rule (CMS-9915-P) 

Press release

CMS Announces Enhanced Program Integrity Efforts for the Exchange

Fact sheet

2019 Health and Human

Press release
Today, the Centers for Medicare & Medicaid Services (CMS) released the weekly enrollment snapshot through 11:59PM Eastern Time on December 17, for the 2020 Open Enrollment Period with over 8.3 million people enrolled compared to approximately 8.5 million people at the end of the Open Enrollment Period last year on December 15, 2018.