XLHealth, which runs Medicare chronic condition special needs plans, has appointed John R. Mach, Jr., MD, to CMO, effective Aug. 1. Most recently, Mach served as chairman/CEO of United HealthCare's Evercare health plans, the business unit that owns and manages all of United's Medicare special needs plans. XLHealth also has appointed Karl Broussard to serve as its vice president of contracting and provider relations. Before joining XLHealth, Broussard served nine years in various executive roles at Coventry Health Care, most recently as vice president of network development with the company's Vista health plan.