Indiana PPOs Elkhart Medical Organization PPO healthcare network. It includes doctors, hospitals, and other healthcare professionals, serving most of Indiana and parts of Michigan and Ohio. Pennsylvania's Preferred Health Networks. Statewide affiliation of PPOs comprised of independent regional provider networks which have health insurance plans. Includes list of partners. Health Care Payers Coalition. A partnership of business and labor benefit plans dedicated to promoting quality, accountability and cost containment in the health care delivery system. Offers a PPO program for self-funded programs. EnCircle (EPO) Healthcare Networks serving Indiana and parts of Illinois, Ohio, Kentucky and Michigan. Indiana Health Network. PPO network to health and workers' compensation plans offered through insurance companies, third party administrators (TPA's) and self funded employers.