This bill, known as the Veterans Medicare Premium Transparency Act, aims to enhance transparency regarding the interaction between Department of Veterans Affairs (VA) healthcare enrollment and Medicare premiums. It mandates that the annual "Medicare & You" handbook and other official notices, both print and online, provide clear explanations of how enrollment in the VA patient enrollment system affects an individual's monthly Medicare Part B and Part D prescription drug plan premiums. Specifically, the legislation requires the information to clarify that months of VA enrollment are considered when determining Medicare Part B monthly premiums. It also explicitly states that enrollment in the VA patient enrollment system qualifies as creditable prescription drug coverage for Medicare Part D purposes, which is crucial for avoiding penalties. Furthermore, the bill directs the Secretary of Health and Human Services and the Secretary of Veterans Affairs to jointly submit a report to Congress within 180 days of enactment. This report must summarize the updates made to publications and provide an estimate of the number of veterans who were paying increased Medicare Part B premiums while also having been enrolled in the VA patient enrollment system.