Health Republic of New York, the largest Obamacare co-op in the country, was ranked as the worst health insurance company in complaints in 2014, according to the New York State Department of Financial Services.

State regulators ordered Health Republic Friday to stop writing insurance policies as it was no longer qualified to provide health insurance policies under New York state standards. Health Republic is the sixth of 23 health insurance co-ops funded by Obamacare since 2011 at a cost of $2.4 billion.