MIAMI (AP) — New premiums and copay proposals for Florida Medicaid beneficiaries, including $100 for every non-emergency ER visit, are among the highest in the country and a new study warns it could cause hundreds of thousands to drop out because they can't afford to pay them, according to a report released Wednesday by Georgetown University.

"This is a very radical proposal which would undermine the progress Florida has made in covering children," said Joan Alker, co-executive director of the Georgetown University research center.

Nearly a dozen states saw enrollment declines as a result of new or increased premiums charged to Medicaid beneficiaries, although specific policies varied considerably, according to the report.