Part D Coverage Determination – How to Ask for a Drug Your Plan Refuses

medicare part d coverage determination is the formal request that makes your Part D plan answer, in writing, whether it will pay for a drug. You are probably reading this at a pharmacy counter. The pharmacist said the plan will not cover it. Maybe the drug is not on the formulary. Maybe it needs prior authorization. Maybe the price jumped to a tier your family cannot absorb. The pharmacist should hand you a one-page notice titled “Medicare Prescription Drug Coverage and Your Rights,” Form CMS-10147.

That notice is not a denial. It is an instruction sheet. It tells you to call your plan and ask for a medicare part d coverage determination. Nothing moves until someone asks.

What “medicare part d coverage determination” Actually Means

A medicare part d coverage determination is the plan’s first official decision about a drug. It covers whether the drug is on the formulary, what tier it sits on, and whether a restriction applies. Restrictions include prior authorization, step therapy and quantity limits. The rules live at 42 CFR 423.566.

An exception is one type of medicare part d coverage determination. There are three kinds. A formulary exception asks the plan to cover a drug it does not list. A tiering exception asks for a lower cost-sharing tier. A coverage-rule exception asks the plan to waive prior authorization, step therapy or a quantity limit. The exception standard is set at 42 CFR 423.578.

Every exception requires a supporting statement from the prescriber. Without it, the plan does not have to decide on the merits. Read the CMS overview at CMS Coverage Determinations.

The Deadline You Cannot Miss

Two clocks matter. The first is the plan’s clock. For a standard request, the plan has 72 hours. For an expedited request, it has 24 hours. See 42 CFR 423.568.

Here is the trap. On an exception request, that clock does not start when you call. It starts when the plan receives the prescriber’s supporting statement. So chase your doctor’s office, not just the plan.

The second clock is yours. Once you get a written denial, you have 60 calendar days from the date of the notice to file a Level 1 appeal. That notice is titled “Notice of Denial of Medicare Prescription Drug Coverage,” Form CMS-10146. Late filings can sometimes be accepted for good cause, but do not rely on it.

For 2026, the amount in controversy is $200 at the ALJ level and $1,960 in federal court. CMS published these in the Federal Register in December 2025. Verify the figure that applies to you at the CMS third-level appeal page.

How to Start a Medicare Part D Coverage Determination

Step one. Call the number on the back of your plan ID card. Ask for a medicare part d coverage determination by name. Say whether you want it standard or expedited. Ask for expedited if waiting 72 hours could seriously harm your health.

Step two. Use the written form. CMS publishes a model “Request for Medicare Prescription Drug Coverage Determination” you can download at CMS.gov. Plans must accept it. Many plans also post their own version.

Step three. Have the prescriber send the supporting statement. It can go by fax, phone or the plan’s portal. This single document starts the 72-hour or 24-hour clock on any exception.

Step four. If someone else is filing for the beneficiary, submit an Appointment of Representative form, CMS-1696. A spouse or adult child is not automatically authorized. Get this in early or the plan may not talk to you.

Step five. Write down the date, the time, and the name of every person you speak to. Ask for a reference number. Ask the plan to confirm in writing that the medicare part d coverage determination was opened.

Step six. Get the denial in writing. A verbal “no” does not start your 60-day appeal clock. The written CMS-10146 notice does, and it must state the specific reason. All model forms sit on the CMS Part D forms page.

What to Put in the File

The prescriber’s letter carries the most weight. It should name the diagnosis. It should name every formulary drug already tried, with dates, doses and what went wrong. It should state plainly why the requested drug is medically necessary for this patient.

For a formulary exception, the prescriber must state that formulary alternatives would not be as effective, or would cause an adverse effect, or both. For a tiering exception, the statement must address the lower-tier drugs for the same condition. Those are the standards written into 42 CFR 423.578.

Add the paper trail. Include pharmacy printouts showing the failed fills. Include chart notes and lab results. Include the CMS-10147 pharmacy notice and the CMS-10146 denial. Include your plan’s Evidence of Coverage page that lists the restriction you are challenging.

Keep a copy of everything you send. Send by fax with a confirmation, or by a method that produces a receipt. A file that a stranger can read in five minutes is the goal.

If the First Level Says No

A denial is not the end. It is the doorway to Level 1, called a redetermination. File within 60 calendar days of the CMS-10146 notice. The plan then has 7 calendar days for a standard review, or 72 hours if expedited, under 42 CFR 423.590. CMS posts a model redetermination request form; confirm the current form number on the CMS Part D forms page before you file.

Lose there, and Level 2 goes to an Independent Review Entity that does not work for your plan. Same 60-day window. Same 7-day and 72-hour clocks. The IRE reviews the file fresh.

Free help exists, and you should use it. Call 1-800-MEDICARE (1-800-633-4227), TTY 1-877-486-2048, open 24 hours a day. Call your State Health Insurance Assistance Program for free one-on-one counseling; find your state office at shiphelp.org or call 1-877-839-2675.

The Medicare Rights Center runs a national helpline at 1-800-333-4114 and publishes a Part D appeals toolkit at Medicare Interactive. The Center for Medicare Advocacy posts self-help materials at medicareadvocacy.org.

One clarification about the QIO. Beneficiary and Family Centered Care QIOs handle hospital discharge and skilled nursing termination appeals, not Part D drug denials. If you need your QIO for a care-setting issue, get the current number from 1-800-MEDICARE or Medicare.gov.

Mistakes That Sink a Medicare Part D Coverage Determination

Waiting for the doctor to act. Many families assume the prescriber filed something. Often nobody did. You can open the medicare part d coverage determination yourself and then push the supporting statement.

Accepting a verbal denial. Without the written CMS-10146 notice, you have no dated document and no clean appeal record. Ask for it every time.

Skipping the expedited option. If a delay would seriously jeopardize health, ask for the fast track. It moves a medicare part d coverage determination from 72 hours to 24 hours.

Filing without the CMS-1696. If an adult child is handling the medicare part d coverage determination, the plan may refuse to release information until representation is on file.

Missing the 60-day window. It runs from the notice date, not the date you opened the envelope. Calendar it the day it arrives.

Frequently Asked Questions

Can I file a medicare part d coverage determination myself, without my doctor?

Yes. You, your appointed representative, or your prescriber may request one. But any exception request still requires the prescriber’s supporting statement before the plan’s clock starts. Open the request, then chase the statement.

What is the difference between a coverage determination and an appeal?

The medicare part d coverage determination is the plan’s first decision. An appeal, called a redetermination, comes after a denial. You cannot appeal until you have a decision to appeal.

Does an approved exception last all year?

Under 42 CFR 423.578, an approved exception generally stays in effect for the remainder of the plan year while you remain enrolled and the prescriber keeps prescribing it. Confirm the exact end date in writing with your plan.

What if I already paid out of pocket?

You can still file a medicare part d coverage determination asking the plan to reimburse you. Keep the pharmacy receipt showing the drug, date and amount. Reimbursement requests generally follow a longer standard timeframe, so ask your plan to state its deadline in writing.

Where to Get Free Help

Three doors cost nothing. Your State Health Insurance Assistance Program (SHIP) counselor will work the medicare part d coverage determination 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.

Related Guides

• Helping Parents With Medicare
• Nursing Home Medicaid by State
• More in this category
• Medicare by State
• Browse All Medicare Guides