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.
Page 28. ameritas PPO Dental Plan. To access the full value of the PPO Plan, you are strongly encouraged to utilize in-network pro-. viders. if you are not planning to utilize an in-network Provider, do not enroll in the PPO Plan. or your Out-of-Network benets will be signicantly reduced.