The number of people who selected private "qualified health plans" (QHPs) through the new public health insurance exchanges fell 44 percent between December and January, to about 1.1 million.
The number who got through the Patient Protection and Affordable Care Act (PPACA) QHP eligibility determination process fell 48 percent, to 2.1 million.
The number of completed applications received fell 39 percent, to about 2.1 million.
But the total number of people who have selected QHPs increased to 3.3 million as of Feb. 1, up from 2.2 million on Dec. 28, according to analysis of the latest U.S. Department of Health and Human Services (HHS) exchange activity statistics.
The total number of people who had completed the QHP eligibility determination process has increased to 7.3 million, from 5.1 million.
HHS has made analyzing month-to-month changes difficult by publishing only cumulative statistics. LifeHealthPro came up with monthly figures by subtracting the December activity numbers from the January numbers and the November numbers from the December numbers.
HHS runs some of the PPACA exchanges and states run others.