Employer or Union Retiree or health care plans, according to the Centers for Medicare and Medicaid Services (CMS) is defined as:
Health plans that give health coverage to employees, former employees, and their families. These plans are offered to people through their (or a spouse’s) current or former employer or employee organization.
Remember that not all employer or union health plans provide "
creditable" prescription drug coverage and you can read more about this in our Frequently Asked Questions: "
What is the difference between creditable and non-creditable Employer Retiree Drug Coverage?"
(sources include: Medicare.gov)