Some members have paid hundreds of dollars a month, and then have been left with hundreds of thousands in unpaid medical bills in several states where the ministries, which are not subject to regulation as insurers, failed to follow through on pooling members’ expenses.

Numerous states are taking action against Aliera Healthcare, the for-profit company based in Georgia that was been the subject of an investigation by The Houston Chronicle. The Texas attorney general sued Aliera last summer to stop it from offering “unregulated insurance products to the public,” while Connecticut, Washington and New Hampshire are trying to stop Trinity and Aliera from doing business in those states.

Regulators say they are concerned that the ministry is, in fact, operating as an insurer. In New York, which has not previously investigated any ministries, there have been 15 to 20 complaints, including accusations that Aliera misrepresented the coverage being offered. It’s not clear how many customers Aliera has in New York.

“It’s deeply disappointing to see state regulators working to deny their residents access to more affordable alternatives offered by health care sharing ministries,” said Aliera in an emailed statement.

“We’re proud of the work we do to help ministries provide a more flexible method for securing affordable high-quality health care, and we will continue to vigorously defend against the false claims about our company, just as we expect the health care sharing ministries we serve to vigorously defend their members’ right to exercise their religious convictions in making health care choices,” it said.