Why it matters
Recent changes have restructured and capped out-of-pocket drug costs under Part D, so the classic "donut hole" gap works differently than it used to -- it's worth checking the current-year structure rather than relying on older explanations.
Example
Someone with high prescription drug costs might track their spending through the year to understand which Part D cost stage they're in.
Common mistake
A common mistake is relying on outdated explanations of the donut hole from several years ago -- Part D's cost structure has changed and continues to change by year.