ADA is actively addressing widespread denials of medically necessary diagnostic audiology services by Anthem Medicare Advantage plans that began in mid-2025. Despite clear federal requirements that Medicare Advantage plans cover all medically necessary diagnostic audiology services, Anthem has denied claims across multiple states and improperly redirected providers to a third-party administrator that does not process these services. After repeated attempts to resolve the issue informally, ADA has issued a formal demand letter to Anthem and escalated the matter to the Centers for Medicare & Medicaid Services (CMS) and the U.S. Department of Health and Human Services (HHS).