(Reuters) President Barack Obama’s ban on discriminatory health insurance practices against the sick has not stopped insurers from increasing up-front charges for the expensive drugs needed to control chronic illnesses from leukemia to multiple sclerosis.

Actuarial studies of plans sold through health insurance marketplaces in some states found that many make consumers responsible for as much as 50 percent of the price of specialty drugs, which can cost $8,000 or more a month.

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