Who is the largest PBM?
Top PBMs by market shareCaremark (CVS Health) / Aetna: 30 percent.Express Scripts: 23 percent.OptumRx (UnitedHealth): 23 percent.Humana Pharmacy Solutions: 7 percent.MedImpact Healthcare Systems: 6 percent.Prime Therapeutics: 6 percent.All other PBMs + cash pay: 4 percent.Similarly, who are the PBMs...