Rules & Rights
Coverage Determination
Quick answer
A coverage determination is the plan's formal decision about whether a drug is covered, how much you'll pay, and any requirements like prior authorization.
Plain-English definition
You, your prescriber, or your representative can request one at any time.
Why it matters
It's the required first step before you can file a Part D appeal.
A simple example
You request a coverage determination for a drug not on the formulary; the plan responds within 72 hours.
Common mistakes & misconceptions
Related terms
Appeal
An appeal is your formal request to change a coverage or payment decision made by Medicare, a Medicare Advantage plan, or a Part D plan. Medicare has five levels of appeal.
Grievance
A grievance is a formal complaint to your plan about service quality, access, or the appeals process — not about coverage decisions themselves.
Prior Authorization
Prior authorization is a plan requirement that your doctor get approval before a specific drug or service is covered. It's used to confirm medical necessity and steer to lower-cost alternatives.
Tier Exception
A tier exception is a formal request for your plan to charge the lower-tier copay for a drug currently placed on a higher tier.
Frequently asked questions
What happens if the plan denies?+
You can file an appeal.
Sources & references
📚 Where this information comes from
- Medicare.gov — official U.S. government site for people with Medicare ↗Primary source for benefits, enrollment periods, and plan comparison.
- CMS.gov — Centers for Medicare & Medicaid Services ↗Federal rulemaking, program updates, and official guidance.
- Social Security Administration — Medicare enrollment & premiums ↗Enrollment, premium withholding, and IRMAA determinations.
When you're ready, compare plans on your own terms
See Medicare Advantage plans from the insurance companies we represent, or walk the course with a licensed agent whenever you'd like a second set of eyes.
We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.
Medicare Caddies is an independent insurance agency. We are not affiliated with, endorsed by, or connected to the U.S. government, the federal Medicare program, or the Centers for Medicare & Medicaid Services (CMS). We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.