Powered by Q1Group LLC
Education and Decision Support Tools for the Medicare Community
Speak to a Licensed Agent | Mon-Fri 9:00am-8:00pm ET
1-833-535-3283 TTY: 711
If I enroll into another Medicare Part D plan, do I need to contact my old Medicare plan and report the change?

Category: Changing Medicare Part D Plans
Updated: Nov, 26 2021

No.  When you change or switch to a new Medicare Part D prescription drug plan, you do not need to contact or cancel your old Medicare plan.

Your old or existing Medicare Part D plan will be automatically contacted when you enroll in a new Part D plan or Medicare Advantage plan.

The coordination of the cancellation of your old plan and the start of your new plan will be handled between Medicare and the Medicare Part D plan providers.

For example:  If you are enrolled in a 2021 Humana Medicare Part D plan and join a 2022 Aetna Medicare Part D plan, you do not need to contact Humana about the change.  Humana will be automatically informed that you are now enrolled into another 2022 prescription drug plan.

When will my new Medicare Part D plan begin?

If you switch plans during the Fall annual Open Enrollment Period or Annual Coordinated Election Period or Annual Enrollment Period (AEP) running from October 15 to December 7 of each year, your old Medicare Part D prescription drug coverage will end on December 31st and your new prescription drug coverage will begin January 1st.

If you are allowed to join a Medicare Part D plan outside of the AEP, your new Medicare Part D plan or Medicare Advantage plan will start or become effective the first day of the month after enrollment.

For example:  If you enroll on June 2, your new Medicare Part D plan will start on July 1.

Is it possible that I will receive new membership information from both my old and new plan?

Yes.  Sometimes when you change Medicare plans you will receive a Member ID from both your old plan and your newly chosen Medicare plan.

Receiving more than one "Welcome to our plan" letters can happen if you enroll into a new Medicare plan late in the AEP (such as on December 6th) - or if there is an internal computer error causing a slight delay when processing your new enrollment.  In such a situation, your old Medicare Part D plan may not be notified of your change before January 1 and may still mail you a new Member ID card and "Welcome" Package for the new plan year - and you will also receive a similar mailing of a Member ID card from your newly chosen Medicare Part D plan.

You will not be able to use both prescription drug plans or Medicare Advantage plans at the same time and instead, you should find that the Member ID card from your old Medicare plan is no longer valid.

For example:  If you were enrolled in an 2021 Aetna Medicare Part D plan and, on December 6th you enrolled into a 2022 Humana Medicare Part D plan, you may receive new 2022 Member IDs or "Welcome" information from both Humana and Aetna.  But, only your newly chosen plan from 2022 Humana plan will be effective starting January 1st, 2022.

How should you avoid any problems or confusion when changing Medicare plans?

Don't wait too long before enrolling in your newly chosen plan.  We suggest that if you are changing Medicare Part D or Medicare Advantage plans, please try to complete your enrollment before the last week of the AEP (before December 1 through December 7) and instead, enroll earlier, such as in mid-November, so that your new enrollment application can be processed before December 7th and you will have a smooth transition into your newly chosen Medicare prescription drug plan.

How do you find the Medicare Part D or Medicare Advantage plans that are available in your area?

When in doubt, you can always call a Medicare representative at 1-800-633-4227.  We also have several online tools to help you get an overview of the Medicare Part D plans in your area.  Here are some good ways to find a new plan for next year:

PDP-Finder - Review all stand-alone Medicare Part D plans (PDPs) available in your state or enter search criteria to narrow the plan list.

MA-Finder - Review all Medicare Advantage plans (MAPDs, MAs, and SNPs) available in your state or enter search criteria to narrow the plan list.

PDP-Wizard - This tool provides you with a little guided help finding a stand-alone Medicare Part D plan.  Just answer the questions and we will show you Medicare Part D plans generally meeting your needs.

Medicare Supplements
fill the gaps in your
Original Medicare
Speak to a Licensed Agent
Mon-Fri 9:00am-8:00pm ET

» Medicare Supplement FAQs

Browse FAQ Categories


Compare Local Pharmacy Prices Using a Drug Discount Card
Prescription Discounts are
easy as 1-2-3
  1. Locate lowest price drug and pharmacy
  2. Show card at pharmacy
  3. Get instant savings!
Your drug discount card is available to you at no cost.


Tips & Disclaimers
  • Q1Medicare®, Q1Rx®, and Q1Group® are registered Service Marks of Q1Group LLC and may not be used in any advertising, publicity, or for commercial purposes without the express authorization of Q1Group.
  • The Medicare Advantage and Medicare Part D prescription drug plan data on our site comes directly from Medicare and is subject to change.
  • Medicare has neither reviewed nor endorsed the information on our site.
  • We provide our Q1Medicare.com site for educational purposes and strive to present unbiased and accurate information. However, Q1Medicare is not intended as a substitute for your lawyer, doctor, healthcare provider, financial advisor, or pharmacist. For more information on your Medicare coverage, please be sure to seek legal, medical, pharmaceutical, or financial advice from a licensed professional or telephone Medicare at 1-800-633-4227.
  • We are an independent education, research, and technology company. We are not affiliated with any Medicare plan, plan carrier, healthcare provider, or insurance company. We are not compensated for Medicare plan enrollments. We do not sell leads or share your personal information.
  • Benefits, formulary, pharmacy network, provider network, premium and/or co-payments/co-insurance may change on January 1 of each year. Our PDP-Compare.com and MA-Compare.com provide highlights of annual plan benefit changes.
  • The benefit information provided is a brief summary, not a complete description of benefits. For more information contact the plan.
  • Limitations, copayments, and restrictions may apply.
  • We make every effort to show all available Medicare Part D or Medicare Advantage plans in your service area. However, since our data is provided by Medicare, it is possible that this may not be a complete listing of plans available in your service area. For a complete listing please contact 1-800-MEDICARE (TTY users should call 1-877-486-2048), 24 hours a day/7 days a week or consult www.medicare.gov.
  • When enrolling in a Medicare Advantage plan, you must continue to pay your Medicare Part B premium.
  • Medicare beneficiaries with higher incomes may be required to pay both a Medicare Part B and Medicare Part D Income Related Monthly Adjustment Amount (IRMAA). Read more on IRMAA.
  • Medicare Advantage plans that include prescription drug coverage (MAPDs) are considered Medicare Part D plans and members with higher incomes may be subject to the Medicare Part D Income Related Monthly Adjustment Amount (IRMAA), just as members in stand-alone Part D plans. In certain situations, you can appeal IRMAA.
  • You must be enrolled in both Medicare Part A and Part B to enroll in a Medicare Advantage plan. Members may enroll in a Medicare Advantage plan only during specific times of the year. Contact the Medicare plan for more information.
  • If you are enrolled in a Medicare plan with Part D prescription drug coverage, you may be eligible for financial Extra Help to assist with the payment of your prescription drug premiums and drug purchases. To see if you qualify for Extra Help, call: 1-800-MEDICARE (1-800-633-4227). TTY users should call 1-877-486-2048, 24 hours a day/ 7 days a week or consult www.medicare.gov; the Social Security Office at 1-800-772-1213 between 7 a.m. and 7 p.m., Monday through Friday. TTY users should call, 1-800-325-0778; or your state Medicaid Office.
  • Medicare evaluates plans based on a 5-Star rating system. Star Ratings are calculated each year and may change from one year to the next.
  • A Medicare Advantage Private Fee-for-Service plan (PFFS) is not a Medicare supplement plan. Providers who do not contract with the plan are not required to see you except in an emergency.
  • Disclaimer for Institutional Special Needs Plan (SNP): This plan is available to anyone with Medicare who meets the Skilled Nursing Facility (SNF) level of care and resides in a nursing home.
  • Disclaimer for Dual Eligible (Medicare/Medicaid) Special Needs Plan (SNP): This plan is available to anyone who has both Medical Assistance from the State and Medicare. Premiums, co-pays, co-insurance, and deductibles may vary based on the level of Extra Help you receive. Please contact the plan for further details.
  • Disclaimer for Chronic Condition Special Needs Plan (SNP): This plan is available to anyone with Medicare who has been diagnosed with the plan specific Chronic Condition.
  • Medicare MSA Plans combine a high deductible Medicare Advantage Plan and a trust or custodial savings account (as defined and/or approved by the IRS). The plan deposits money from Medicare into the account. You can use this money to pay for your health care costs, but only Medicare-covered expenses count toward your deductible. The amount deposited is usually less than your deductible amount, so you generally have to pay out-of-pocket before your coverage begins.
  • Medicare MSA Plans do not cover prescription drugs. If you join a Medicare MSA Plan, you can also join any separate (stand-alone) Medicare Part D prescription drug plan
  • There are additional restrictions to join an MSA plan, and enrollment is generally for a full calendar year unless you meet certain exceptions. Those who disenroll during the calendar year will owe a portion of the account deposit back to the plan. Contact the plan provider for additional information.
  • Medicare beneficiaries may enroll through the CMS Medicare Online Enrollment Center located at www.medicare.gov.
  • Medicare beneficiaries can file a complaint with the Centers for Medicare & Medicaid Services by calling 1-800-MEDICARE 24 hours a day/7 days or using the medicare.gov site. Beneficiaries can appoint a representative by submitting CMS Form-1696.