According to a recent report:

• Enrollees in plans purchased on the health insurance exchange spent 21% less out-of-pocket on all prescription medications, and 20% less out-of-pocket on specialty medications in the first quarter of 2015 compared to the first quarter of 2014
• From January 1, 2014 to March 31, 2015, 42% of all pharmacy spending among exchange plans was for specialty medications
• Exchange plan costs for prescription drugs were 36% lower per member per month in the first quarter of 2015 compared to the first quarter of 2014
• In 2014, over 68% of total Rx drug spending in 2014 was done by 5% of exchange plan patients

Source: "Express Scripts Provides First Look at 2015 Public Exchange Pharmacy Trends," Express Scripts Press Release, July 1, 2015, http://phx.corporate-ir.net/phoenix.zhtml?c=69641&p=irol-newsArticle&ID=2063955