A medicare part d formulary exception is the request you file when your drug plan will not cover the medicine your doctor prescribed. You may be reading this at a pharmacy counter right now. The pharmacist just told you the drug is “not on the list.” Or the price jumped to hundreds of dollars overnight. Nothing is broken and nobody made a mistake. Your plan simply built a formulary, and this drug is not on it, or it sits on a tier you cannot afford.
- What “medicare part d formulary exception” Actually Means
- The Deadline You Cannot Miss
- How to Start a Medicare Part D Formulary Exception
- What to Put in the File
- If the First Level Says No
- Mistakes That Sink a Medicare Part D Formulary Exception
- Frequently Asked Questions
- Key Takeaways: Medicare Part D Formulary Exception
- Where to Get Free Help
- Official Sources & Resources
- Related Guides
Federal rules give you a way to challenge that. The process has named notices, named forms, named deciders and hard deadlines in days. This guide walks through each one in order.
What “medicare part d formulary exception” Actually Means
A formulary is your plan’s covered drug list. A medicare part d formulary exception asks the plan to cover something outside its normal rules. The authority is 42 CFR 423.578, the Part D exceptions regulation.
There are three common types. A formulary exception covers a drug not on the list at all. A utilization management exception waives prior authorization, step therapy or a quantity limit. A tiering exception moves a covered drug to a cheaper cost-sharing tier.
One rule matters more than any other. The plan cannot decide a medicare part d formulary exception without a supporting statement from your prescriber. CMS explains this on its Exceptions page. The clock does not start until that statement arrives.
The Deadline You Cannot Miss
If the pharmacy cannot fill the drug, the pharmacist must hand you a notice called “Medicare Prescription Drug Coverage and Your Rights,” form CMS-10147. That notice is not a denial. It tells you to contact your plan.
The real denial arrives as the “Notice of Denial of Medicare Prescription Drug Coverage,” form CMS-10146. From receipt of that notice, you have 60 calendar days to file the next appeal. Plans generally count 65 days from the date on the notice, allowing 5 days for mail.
| Step | Notice or form | Who decides | Deadline |
|---|---|---|---|
| Pharmacy cannot fill | CMS-10147 pharmacy notice | Pharmacist hands it over | Given at the counter |
| Coverage determination / exception request | CMS Model Coverage Determination Request Form | Your Part D plan sponsor | 72 hours standard, 24 hours expedited, from receipt of the prescriber’s supporting statement |
| Denial issued | CMS-10146 denial notice | Your Part D plan sponsor | Starts your 60-day appeal clock |
| Level 1: Redetermination | Model Redetermination Request Form | Your Part D plan sponsor | File within 60 days of receipt; decision in 7 calendar days standard, 72 hours expedited |
| Level 2: Reconsideration | Model Reconsideration Request Form | Independent Review Entity (IRE), outside your plan | File within 60 days; decision in 7 calendar days standard, 72 hours expedited |
| Level 3: ALJ hearing | OMHA request form | Administrative Law Judge at OMHA | File within 60 days; 2026 amount in controversy is $200 |
| Level 4: Council review | DAB-101 | Medicare Appeals Council | File within 60 days |
| Level 5: Federal court | Civil complaint | U.S. District Court | File within 60 days; 2026 amount in controversy is $1,960 |
The 2026 dollar thresholds come from the Federal Register notice adjusting amount in controversy amounts for calendar year 2026. Confirm your own plan’s mailing address and fax number in your Evidence of Coverage before you send anything.
How to Start a Medicare Part D Formulary Exception
Step one. Call the number on the back of your plan card. Ask for a coverage determination and say the words “formulary exception.” Ask whether you qualify for a transition fill, a temporary supply available to many enrollees in the first 90 days of a plan year.
Step two. File in writing using the Request for Medicare Prescription Drug Coverage Determination form. Plans may use their own version. Either is acceptable. CMS describes the process on its Coverage Determinations page.
Step three. Ask your prescriber to submit the supporting statement the same day. A medicare part d formulary exception stalls without it. Many prescribers can submit electronically through the plan’s portal, which is faster than fax.
Step four. Request an expedited decision if waiting could seriously harm your health. Expedited means 24 hours instead of 72. The plan must expedite if your prescriber says the standard timeframe could jeopardize your life, health or ability to regain maximum function.
Step five. Write down the date, the time, the representative’s name and a reference number for every call. Keep the fax confirmation page.
What to Put in the File
The prescriber’s letter carries the decision. For a formulary exception, it should state that formulary alternatives would not be as effective, would cause an adverse effect, or both. Naming the specific alternatives tried matters.
Include the drug name, strength, dose and expected duration. Include the diagnosis and the ICD-10 code. Include dates when each alternative was tried and what happened. Attach lab results, imaging or pharmacy records that back up the story.
For a tiering exception, the letter should explain why the lower-tier alternatives would not be as effective or would cause an adverse effect. Note that tiering exceptions are not available for every drug or tier. Your plan’s Evidence of Coverage states which tiers are excluded.
Send a short cover letter listing every enclosure. Keep a complete copy for yourself.
If the First Level Says No
A denial is not the end. The next step is a redetermination, decided by the same plan but by different reviewers. CMS explains it on the Redetermination by the Part D Plan Sponsor page. File within 60 calendar days of receiving the CMS-10146 notice.
If that fails, Level 2 goes to an Independent Review Entity contracted by CMS. It is not part of your plan. See the Reconsideration by the Part D Independent Review Entity page. Level 3 is an Administrative Law Judge at the Office of Medicare Hearings and Appeals.
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Free help exists at every level. Call 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048, 24 hours a day. Call your State Health Insurance Assistance Program at 1-877-839-2675 for free local counseling. The Medicare Rights Center national helpline is 1-800-333-4114.
One clarification. The Beneficiary and Family Centered Care QIO handles hospital discharge and quality-of-care appeals, not drug coverage. Ask 1-800-MEDICARE for your region’s QIO number if you need that instead.
Mistakes That Sink a Medicare Part D Formulary Exception
Waiting on the prescriber without following up. The plan’s clock has not started until that supporting statement lands. Call the office every day until it is sent, then call the plan to confirm receipt.
Filing by phone and keeping no record. A verbal request is valid, but a paper trail protects you at the next level. Follow up in writing the same day.
Treating the pharmacy notice as the denial. CMS-10147 is only a pointer. Your 60-day appeal clock runs from the CMS-10146 denial notice, so read every envelope.
Sending a letter that says only “medically necessary.” A medicare part d formulary exception turns on specifics. Name the alternatives, the dates and the outcomes.
Missing the 60-day window. Late filings can sometimes proceed for good cause, but you must explain the reason. Do not rely on it.
Frequently Asked Questions
How long does a medicare part d formulary exception take?
A standard decision is due within 72 hours, and an expedited decision within 24 hours. Both clocks run from the plan’s receipt of your prescriber’s supporting statement. Ask the plan to confirm in writing the date it received that statement.
Can my doctor file it for me?
Yes. A prescribing physician or other prescriber may request a coverage determination or appeal on your behalf under the Part D rules. You can also name a representative using CMS Form 1696. Check your plan’s Evidence of Coverage for its specific submission instructions.
What happens to my medication while I wait?
Ask your plan about a transition fill, which many enrollees can receive in the first 90 days of a plan year. Ask your prescriber about a short bridge supply or a manufacturer patient assistance program. Confirm eligibility with your plan directly, since terms vary.
Does an approved medicare part d formulary exception last all year?
Approvals generally run through the end of the plan year, but plans set their own end dates. Formularies can also change between years. Ask your plan in writing when the approval expires and what is required to renew it.
Key Takeaways: Medicare Part D Formulary Exception
- The clock starts with the notice. Every medicare part d formulary exception deadline runs from the date on the letter, not the day you read it.
- Appeals are free. Filing a medicare part d formulary exception costs nothing, and asking does not affect your other Medicare coverage.
- The doctor’s letter is the evidence. A medicare part d formulary exception usually turns on a physician stating why the care is medically necessary.
- Ask for it in writing. Phone calls vanish; a medicare part d formulary exception request on paper, sent with tracking, is what survives.
Where to Get Free Help
Three doors cost nothing. Your State Health Insurance Assistance Program (SHIP) counselor will work the medicare part d formulary exception with you; find yours through medicare.gov. The Medicare Rights Center helpline answers appeal questions nationally. And 1-800-MEDICARE can tell you exactly which notice you are holding.
Official Sources & Resources
- Medicare appeals overview: https://www.medicare.gov/claims-appeals
- Center for Medicare Advocacy: https://medicareadvocacy.org
- Medicare Rights Center: https://www.medicarerights.org
- Medicare.gov: https://www.medicare.gov
- CMS.gov: https://www.cms.gov
- Find your SHIP counselor: https://www.medicare.gov/talk-to-someone
Checked against the official sources above in September 2026. Rules and dollar figures change; if a notice you received disagrees with this page, the notice wins — and please tell us. General information, not legal, financial or medical advice.