To find out whether you have Medicare Part D, check four places: the insurance cards in your wallet, your account at Medicare.gov, the plan documents mailed to you each fall, and, if none of those settles it, a call to 1-800-MEDICARE. Part D is prescription drug coverage sold by private insurers under contract with Medicare, and if you have it, at least one of those four sources will show it.
Look at Your Cards
Start with your wallet. The red, white, and blue Medicare card shows Part A, Part B, or both, but it does not show drug coverage.1Medicare. Your Medicare Card If you have a standalone Part D plan, you were issued a separate card by a private insurer.
On that separate card, look for the “Medicare Rx” logo. CMS requires every Part D plan card to display the Medicare Prescription Drug Benefit Program Mark on the front.2CMS. Medicare Communications and Marketing Guidelines If the logo is there, you have Part D. The card should also carry the codes a pharmacy needs to route your claim:3CMS. NCPDP Pharmacy Identification Specification Information
- RxBIN, a six-digit number that routes the claim.
- RxPCN, a Processor Control Number that narrows routing to your specific plan.
- RxGrp, a Group ID identifying the group or employer tied to your coverage.
If your coverage comes through a Medicare Advantage plan instead of Original Medicare, you probably carry one card that handles both medical and drug claims. Look for the letters “PD” or the Medicare Rx logo on that Advantage card to confirm drugs are included.
Sign In to Your Medicare.gov Account
Your online Medicare account shows the coverage CMS has on file for you. Log in at Medicare.gov, or create an account if you don’t have one.4Medicare. Log In to Your Account The summary lists any active prescription drug plan by name, the date coverage started, and your premium.
This is the check to use when you can’t find a card or you’re not sure whether a plan you enrolled in months ago is still in force. The record comes straight from CMS enrollment data, so it settles the question. The same account lets you add your prescriptions and pharmacies and compare plan costs if it turns out you need to switch.
Look for the Fall Plan Mailings
Every Part D plan has to send current enrollees two documents before the next plan year. The Annual Notice of Change is due by September 30, and the Evidence of Coverage is due by October 15.5eCFR. 42 CFR 423.2267 – Required Materials and Content If either landed in your mailbox, the plan has you on record as an active member for the coming year.
The Annual Notice of Change flags what’s different next year: premium, formulary, cost sharing. The Evidence of Coverage spells out the full terms — covered drugs, copays at each tier, network pharmacies. If you can’t find your copies, call the member services number on your plan card and ask for replacements.
Call 1-800-MEDICARE
If nothing in your wallet or mail resolves it, call Medicare at 1-800-MEDICARE (1-800-633-4227), available 24 hours a day, seven days a week except some federal holidays. TTY users can call 1-877-486-2048.6Medicare. Helpful Tools Have your Medicare number ready. A representative can tell you whether you’re enrolled in a Part D plan, which plan it is, and when coverage started.
You can also get free, in-person help from your State Health Insurance Assistance Program. Every state runs a SHIP office with trained counselors who verify enrollment and walk through your options.7CMS. State Health Insurance Assistance Program (SHIP)
Does Your Medicare Advantage Plan Include Drugs?
If you’re on a Medicare Advantage plan (Part C), your drug coverage may already be bundled in. Federal law defines an MA-PD plan as a Medicare Advantage plan that provides qualified prescription drug coverage, and enrollees get their Part D benefits through that plan rather than a separate policy.8Office of the Law Revision Counsel. 42 USC 1395w-101 – Eligibility, Enrollment, and Information Not every Advantage plan includes drugs, so verify.
The clearest place to check is your plan’s Summary of Benefits. If it has a section on prescription drug benefits with tiered drug costs and pharmacy network information, drugs are included. The “PD” letters or Medicare Rx logo on the membership card tell you the same thing.
Some retirees get drug coverage through an Employer Group Waiver Plan, where a former employer wraps Part D into a retiree health package. If your former employer manages your Medicare coverage, ask the benefits administrator. In many of these arrangements the Part D piece is handled behind the scenes, and you may have been enrolled automatically.
Were You Enrolled Automatically?
Some people end up with Part D without ever picking a plan. If you qualify for both Medicare and Medicaid (dual eligible), CMS auto-enrolls you in a Part D plan. The same can happen if you receive Supplemental Security Income. That’s another reason the checks above matter: you may have coverage you never signed up for.
People who qualify for Extra Help (the Low-Income Subsidy program) get color-coded notices from CMS confirming their status:9CMS. Guide to Consumer Mailings From CMS, Social Security, and Plans in 2025/2026
- A purple notice means you will automatically get Extra Help.
- A yellow notice means you’ve been auto-enrolled in a Part D plan because you qualify for both Medicare and Medicaid.
- A green notice goes to people who applied for and qualified for Extra Help, or who belong to a Medicare Savings Program.
If any of those arrived in your mail, you have Part D and you’re getting help with the cost.
If None of the Checks Shows Part D
If nothing above turns up active Part D, the next question is whether you have other drug coverage that counts as “creditable.” Coverage is creditable when it’s expected to pay, on average, at least as much as the standard Medicare Part D plan.10CMS. What Is Creditable Coverage? Common examples are drug benefits through a current or former employer, VA health care, and TRICARE. The VA has confirmed that its prescription drug benefit meets the creditable coverage standard, so enrolled veterans can delay joining Part D without penalty.11VA.gov. Prescription Drug Benefit and Medicare Your employer or plan is required to send you a notice each year before October 15 stating whether the coverage is creditable.
If you went without Part D or creditable coverage for an extended stretch, Medicare charges a late enrollment penalty when you do sign up: 1 percent of the national base beneficiary premium for every full month you were uncovered, added to your monthly premium for as long as you have Part D.12CMS. The Part D Late Enrollment Penalty In 2026, the base beneficiary premium is $38.99.13CMS. 2026 Medicare Part D Bid Information and Part D Premium Stabilization Demonstration Parameters The penalty is permanent.
You generally have three chances to sign up. Your Initial Enrollment Period is the seven-month window around the month you first become eligible for Medicare. The Annual Enrollment Period runs October 15 through December 7 each year, with coverage starting January 1.14Medicare. What’s Medicare Drug Coverage (Part D)? A Special Enrollment Period may open if you lose creditable coverage from an employer, move, or qualify for Extra Help. Enrolling on time, even if you don’t take prescriptions yet, is what avoids the permanent penalty.