More than 100 members of the U.S. House have sent a letter to the head of the Centers for Medicare and Medicaid Services (CMS) in an effort to expand Medicare dental coverage. (Traditional Medicare only covers “medically necessary” dental care in a narrowly defined way that excludes not only routine care, but many illness-related treatments.)  The members implored CMS administrator Chiquita Brooks-LaSure to broaden the definition of “medically necessary” to cover many more types of dental care.