You may be owed a temporary transition supply
Checked against the current rules on September 23, 2026.
New enrollees and people affected by a mid-year formulary change are entitled to a temporary transition supply of a drug they were already taking, while a permanent solution (an exception or a prescriber switch) is worked out.
Here's exactly what it means for your appeal, and what to do about it.
What this means
This right is easy to miss because it isn't framed as an appeal at all — it's a temporary bridge, meant to prevent a gap in a drug you were already taking while a permanent solution gets worked out. A pharmacy that simply says "not covered" may never mention it.
The transition supply is deliberately short — usually enough for the plan's standard 30-day transition period — so it's worth starting the permanent request (an exception, or a prescriber-guided switch) right away rather than waiting until the temporary supply runs out.
What to say
Here's what actually moves this forward:
Ask the pharmacy or plan directly for a transition fill, citing 42 CFR § 423.120(b)(3).42 CFR 423.120
If the pharmacy says no, ask the plan's member services line directly.
What to expect
A transition fill is normally a one-time, temporary supply — typically enough for the plan's standard 30-day transition period — while a permanent request is filed.
Who to contact
National contacts for this situation:
1-800-MEDICARE — 1-800-633-4227 (www.medicare.gov)
SHIP (State Health Insurance Assistance Program) locator (www.shiphelp.org)
Your state's SHIP counselor — free, found on the Get Help page below.
This doesn't reset your case
Whatever brought you to this page is a situation the appeal process already accounts for — it's not a sign the case is broken or that you're starting over. The same level structure, the same rule-based reasoning, and the same deadlines already in motion for your case keep applying.
If you want the full picture of how the appeal levels fit together and where a case like this sits in that sequence, that's covered on its own page.
Families deal with this kind of detour more often than the standard version of the process suggests — the straightforward path from denial to letter to decision is common, but it's far from the only real path a case takes.
Whatever the situation, the next real step is usually a phone call — to the contact listed above, or to your state's free counseling program — not another form to fill out on your own.
Sources — last checked September 23, 2026
- 42 CFR 423.120as of September 23, 2026
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By CaseWhy Appeals editorial. See how this content is produced. Not legal advice. Not affiliated with or endorsed by Medicare, CMS, or any health plan. A product of CaseWhy LLC.