The GI, or digestive, tract extends from mouth to anus (see the image below). The division of the GI tract into upper and lower is a matter of some confusion and debate.
Dental PPO insurance plans, also known as dental preferred provider organizations or DPPOs, are a popular dental insurance option due to their flexibility in allowing insured members to choose dentists and dental specialists.
Choose from two dental PPO health plans and the dental + vision package. With a Blue Shield dental PPO plan, you can choose any dentist, but your out-of-pocket costs for covered services are lowest when you receive care from network dental providers.