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Data from Families USA shows if subsidies are withdrawn, Indiana's average $120-per-month health insurance premium would spike to an average of $438 per month.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.
The federal government is giving Americans another chance to get coverage through the federal health insurance marketplace.
The U.S. Department of Health and Human Services says 89 percent of uninsured people don’t know they can enroll in healthcare coverage from now through Feb. 15.
The insurance company Wellpoint has changed its name to Anthem, which is the company's most-recognizable brand.
Federal support for the program is set to run out next year.
Insurance companies are facing higher costs after increased enrollments have led to more hospital visits for treatment.
The number of children without health insurance in Indiana has dropped nearly 1.5 percent in the past four years.