This legislation, known as the "REAL Health Providers Act," amends the Social Security Act to significantly enhance provider directory requirements and accountability for Medicare Advantage (MA) plans, with most provisions taking effect for plan year 2028. It mandates that MA organizations offering specified plans maintain accurate, publicly available online provider directories. These directories must be verified at least every 90 days, or annually for hospitals and certain facilities, and non-participating providers must be removed within five business days. The required directory information includes critical details such as provider name, specialty, contact information, primary office address, whether new patients are accepted, and accommodations for people with disabilities or specific cultural and linguistic needs. To protect enrollees, the bill limits their cost-sharing to the in-network amount (or less) if they receive services from a provider mistakenly listed as participating in the plan's directory. MA organizations are also required to notify enrollees of these cost-sharing protections. Furthermore, MA organizations must annually conduct an analysis of their provider directory accuracy using a random sample, including specialties with high inaccuracy rates like mental health or substance use disorder treatment. They must submit reports to the Secretary, including an accuracy score, which CMS will publicly post starting in 2029. The bill appropriates $4 million to CMS for implementation and directs the Comptroller General to study the impact of these changes, reporting to Congress by 2032. Finally, the Secretary of Health and Human Services is required to hold a public stakeholder meeting to gather input on maintaining accurate directories and reducing administrative burden. Based on this input, the Secretary must issue guidance to MA organizations on best practices for directory accuracy and to Part B providers on updating their information in the National Plan and Provider Enumeration System.