The federal evaluation is to determine if transportation costs are preventing access to care.
The initial deadline for Jan. 1 coverage was Dec. 15.
Open enrollment started Nov. 1 and runs until Jan. 31, 2016.
Open enrollment started Sunday and runs through Jan. 31.
Across the 37 other states in the federal health care marketplace, the average benchmark premium price increased approximately 7.5 percent.
The expansion of Medicaid through the Affordable Care Act meant record increases in Medicaid enrollment and spending nationwide in the 2015 fiscal year.
The amount of uninsured Hoosiers fell to just under 12% last year.
Data from Families USA shows if subsidies are withdrawn, Indiana's average $120-per-month health insurance premium would spike to an average of $438 per month.
Indianapolis-based health insurance provider Anthem recently offered to buy Cigna for $47.5 billion.
Four of eight insurers who sell plans in Indiana through HealthCare.gov have filed proposed rate changes that would lower the price of their insurance plans.