By Debbie Gregory. Up until recently, Tricare did not cover hearing aids for retirees, Tricare for Life and Tricare Reserve Select users. But a recent policy change reclassifies a certain type of bone-implanted hearing aid — Auditory Osseointegrated Implant (AOI) Devices — as a “prosthetic,” opening up coverage of the implant to all Tricare beneficiaries. […]