(Source: PharmiWeb.com) Diplomat Launches CastiaRx, Industry-Leading Specialty Benefit Manager The nation’s largest independent provider of specialty pharmacy services unites benefit–management companies to form specialty-focused CastiaRx. PR Newswire. FLINT, Mich., April 30, 2018. FLINT, Mich., April 30, 2018 /PRNewswire/ — Diplomat …