1. How do I file a grievance with my Triple-S Advantage plan? Posted on September 11, 2017 at 12:25 pm.Written by advantage_admin You may call 1-888-620-1919 from Monday thru Sunday, 8:00 am to 8:00 pm. TTY/TDD users may call 1-866-620-2520. You may also: send an email to moc.e1696188581gatna1696188581vdass1696188581s@sec1696188581navei1696188581rg-sl1696188581aeppa1696188581 send a fax to (787) 993-3261 mail your grievance to: Triple-S Advantage Department of Grievances and Appeals PO Box 11320 San Juan, PR 00922 Post navigation 3. What should I do if my physician is not in the Triple-S Advantage healthcare provider network?1. How do I file a grievance with Medicare?