The U.S. Centers for Medicare and Medicaid Services (CMS) capped off the month of August 2020 with one of the more significant Medicare coverage documents in recent memory. The more immediately impactful part of the proposed rule would offer immediate coverage for devices approved or cleared under the FDA’s breakthrough devices program, but the broader element of this proposed rule offers a definition for the term “reasonable and necessary,” a development that itself constitutes a breakthrough in the world of Medicare coverage of medical technology.