The latest coronavirus emergency funding law bans Medicare drug plans from using formulary tiers and other tactics insurers use to steer patients toward cheaper drugs when Part D or Medicare Advantage beneficiaries request 90-day fills of their prescriptions. Some drug consultants say the new restriction could create a surge in demand for drugs that insurers restrict. Lawmakers included the measure to help seniors stay at home during the pandemic. “During the emergency period described in section 1135(g)(1)(B), subject to subparagraph...