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.e1741815148gatna1741815148vdass1741815148s@sec1741815148navei1741815148rg-sl1741815148aeppa1741815148 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?