Plan sponsors offering prescription drug coverage must provide the annual notice of creditable or non-creditable coverage required under Medicare Part D to Medicare Part D-eligible individuals before October 15, 2018, the start date of the annual open-enrollment period for Medicare Part D.

The Affordable Care Act (ACA) generally prohibits rescission of coverage once an individual is enrolled. Under the ACA, a rescission means the cancellation or discontinuation of health-plan coverage with a retroactive effect.