Redetermination decision: what it means and what to do

The plan's written decision after you asked it to redetermine a coverage determination denial.

A redetermination decision is the plan's written answer after you asked it to redetermine a coverage determination denial — the outcome of Level 1 of a Part D appeal, decided by a different reviewer than the one who made the original denial.

If the plan misses its own deadline to deciderule42 CFR 423.590, that failure itself counts as an adverse redetermination and the plan must forward your case to the Independent Review Entity automatically.

A redetermination can go three ways: the plan fully reverses its own denial (the case is over, in your favor), it partially reverses (some of what you asked for is granted), or it upholds the original denial. Only a full reversal ends the appeal.

If the plan upheld its decision on time, there is something to file at this point — unlike Medicare Advantage's own automatic forward, a Part D case that's upheld on time simply stops unless you request IRE review yourself within the notice's own deadline.

Keep this decision with your other case paperwork — the Independent Review Entity's own review will reference it directly, and having it on hand saves time if you're asked about it.

Read the outcome. The notice states whether the plan reversed its own denial, in whole or in part, or upheld it.

If upheld, you must actively ask for IRE review. Unlike a missed deadline, a real, timely, upheld redetermination does NOT forward itself — you have 65 days from this notice to ask the Independent Review Entity (C2C) for reconsideration yourself.

Read the notice's own instructions. This notice itself must explain exactly how to request IRE review — that's the authoritative source, not a general search.

A Medicare Advantage plan that upholds its own reconsideration must forward the case automatically, every time. A Part D plan only has to forward automatically when it MISSES its own deadline — a real, on-time, upheld redetermination decision requires you to actively request IRE review yourself, in writing, within 65 days. Missing that difference is a common, costly mistake.