Includes: Part A Part B Most Plans Include: Part D and Supplemental Coverage In addition, includes: Includes Part A (Hospital Insurance) and Part B (Medical Insurance) You can add a separate Medicare drug plan for Medicare drug coverage ( Part D) Eligible to use any doctor or hospital in the US that takes Medicare You can also buy supplemental coverage that helps pay your out - of - pocket costs (like your 20% coinsurance) Original Medicare (A&B)