Below are six PPO (Preferred Provider Organization) plans available with the PSATS Trustees Medical Insurance services. The plans include a pharmacy benefit. The PPO provider network for the medical insurance is the Aetna Open Choice PPO network. With the Aetna network you will have access to 80,000 providers and all the 213 acute care hospitals in Pennsylvania. For up-to-date information regarding the participating PPO providers, click here.