WASHINGTON —

Fifty-two-year-old Dinam Bigny sank into debt and had to get a roommate this year, in part because of health insurance premiums that cost him nearly $900 per month.

Next year, those monthly fees will rise by $200 — a significant enough increase that the program manager in Aldie, Virginia, has resigned himself to finding cheaper coverage.

"I won't be able to pay it, because I really drained out any savings that I have right now," he said. "Emergency fund is still draining out — that's the scary part."

Bigny is among the many Americans dependent on Affordable Care Act marketplace health insurance plans who are already struggling with the high cost of health care, according to a new survey from the health care research nonprofit KFF.

Most of the more than 1,300 enrollees sur

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