This operative note describes two major components: (1)revision mastoid surgeryto treat chronic infection/osteomyelitis and remove diseased tissue, and (2)replacement/placement of a BAHA osseointegrated implantin a new location. In the answer set,69502-RTrepresents the revision mastoidectomy-type service (appropriate because this is not a first-time mastoidectomy and includes significant revision/debridement work).69714-RTrepresents theimplantation of an osseointegrated skull devicesuch as a BAHA. The case uses magnifying loupes, not an operating microscope, so69990is not supported; CPT 69990 requires anoperating microscope(explicitly documented), and loupes alone do not meet that threshold. Options using 69717 do not match the described implant service in this question’s choices. Therefore, the correct reporting per the options is69502-RT and 69714-RT.