Option Care Enterprises, Inc. announced that its board of directors has appointed John C. Rademacher, current interim Chief Executive Officer (CEO) and Chief Operations Officer (COO), as the company’s new Chief Executive Officer, effective immediately. Rademacher has over 25 years of health care related experience, and has held various executive-level positions at leading healthcare companies, including Cardinal Health where he served as President and General Manager for both the Ambulatory Care Division and the Nuclear and Pharmacy Services Divisions, and at Cigna Corporation where he served as President of CareAllies and Chief Operating Officer for the CIGNA Behavioral Health business.