3. What should I do if my physician is not in the Triple-S Advantage healthcare provider network? Posted on September 11, 2017 at 12:22 pm.Written by advantage_admin As a general rule, if a physician does not belong to your plan network, his/her service would NOT be covered. However, at Triple-S Advantage we have a wide variety of coverages to meet your needs, with available alternatives for such scenarios, such as PPOs and HMO-POS. Post navigation 8. What do PPO, HMO, POS, and SNP mean?1. How do I file a grievance with my Triple-S Advantage plan?