The document summarizes 2013 Medicare Part D prescription drug statistics from the Centers for Medicare and Medicaid Services. It lists the top 5 most expensive drugs by cost as acid reducers and cholesterol drugs. The top 5 drugs by volume included blood pressure medications and painkillers. The top specialties prescribing drugs were internal medicine, dentistry, family practice, nurse practitioners, and physician assistants. Overall, there were 36 million Part D enrollees, 1 million prescribers, and $103 billion spent on prescribed drugs through Medicare Part D.