Today, the American Diabetes Association ® (ADA) sent a letter to congressional leadership urging action on legislation to increase transparency in prescription drug rebates and prevent pharmacy benefit manager (PBM) practices from inflating the cost of prescription drugs. “Drug middlemen function at the center of the pharmaceutical supply chain and have virtually unparalleled power to affect drug costs, acting as intermediaries between insurers, manufacturers, and pharmacies,” according to the letter. Drug manufacturers often pay PBMs rebates on their drugs in exchange for coverage, limiting