UnitedHealth Group Inc. (NYSE:UNH) saw its shares decline significantly Wednesday afternoon following remarks made by CEO Andrew Witty at the Bernstein 40th Annual Strategic Decisions Conference. What Happened: At the conference on Wednesday, Witty warned of potential disruptions in the Medicaid market as states begin to reduce enrollments in their health programs post-pandemic. The shift away from Medicaid places pressure on insurers to ensure that state reimbursements adequately cover medical expenses, the United Health CEO said, adding that it could take multiple quarters for states to adju…