Creditable prescription drug coverage refers to prescription drug coverage provided by an employer, union, or other entity that meets or exceeds the minimum standards set by Medicare Part D. This coverage includes benefits that are comparable to or better than the coverage offered by Medicare prescription drug plans. Individuals with creditable prescription drug coverage may be eligible for a special enrollment period to enroll in a Medicare Part D plan without facing penalties for late enrollment. Understanding creditable prescription drug coverage is essential for Medicare beneficiaries to ensure they have access to affordable and comprehensive prescription drug benefits.