I signed up for part A. I'm still on my husband's insurance so I didn't sign up for part B. is there a form I need to fill out stating I'm still on my husbands insurance?

Answered by 47 licensed agents

Once you’re ready to re-enroll in Medicare Part B, you’ll need to complete form CMS-40B. This form allows you to show proof of prior creditable coverage, which helps you avoid a late enrollment penalty.

Answered by Travis Harmon on September 3, 2025

Broker Licensed in OR, AL, AZ & 6 other states

Answered by Travis Harmon Medicare Insurance Agent
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A question: I signed up for Part A. I'm still on my husband's insurance and didn't start my Part B. Is there a form I need to fill out stating that I'm still on my husband's insurance? The answer is no, but once you do apply for your Part B, once your husband retires or comes off his health plan or leaves his employer and you're no longer going to be covered under your husband's health insurance, then you do want to enroll each year in Medicare Part B if you're past 65. When you're doing that, Medicare is going to require you to show proof that you were on a qualified health plan. So if you have any questions regarding that, the best thing I can recommend is to sit down with a licensed Medicare agent who can guide you through and make sure that you're making the right choice. Again, it's always very valuable to meet with a licensed Medicare agent because their purpose is to help you navigate through and understand what your options are. When it comes to Medicare, hopefully that answers your question. Thank you.

Answered by Gary Church on January 9, 2026

Broker Licensed in Ca, AZ, NV & TX

Answered by Gary Church Medicare Insurance Agent
If you signed up on line then you would have been signed up for both unless you checked the box that indicates you did not want Part B. If you did not check the box, you will be enrolled in both.

If you are enrolled in both A and B and you want to stop your B, you may do so. Sign your Medicare card on the back and return it to Social Security. Include a note indicating that you want to decline your Part B at this time.

Answered by Mark Bilgere on September 16, 2025

Broker Licensed in TX, AR, IN & LA, MN, NE & OK

Answered by Mark Bilgere Medicare Insurance Agent
No. You don’t have to do anything until you are ready to be on Medicare full time.

You will have 63 days to get into your Medicare plan so it is wise to sign up for Part B a month before your group insurance expires or is terminated and to review your plan options in advance as well.

Answered by Mark Maliwauki on November 15, 2025

Broker Licensed in ID, AZ, CA & 13 other states

Answered by Mark Maliwauki Medicare Insurance Agent
No you do not have to fill out a form. But when you do sign up for part B you will have to show you had coverage up till that time. That way you will not be faced with any penalties for late enrollment.

Answered by Bill Wheeler on September 3, 2025

Broker Licensed in KY & IN

Answered by Bill Wheeler Medicare Insurance Agent
You don’t need to fill out anything. Just be aware that if you go off of his insurance, you need to be ready to go with your part B. So, if you know, your husband‘s going to retire in six months, I would say four months before he retires I would start working on your part B paperwork.

Answered by Jonathan Potter on May 26, 2026

Broker Licensed in UT, AZ, CA & 14 other states

Answered by Jonathan Potter Medicare Insurance Agent
There is no form that you fill out until you are ready to get Medicare Part B started, once you have decided to drop the employer group plan. Keep in mind that you won't incur a penalty as long as your current group coverage is considered "creditable coverage." You should also talk to a licensed broker to compare if you could save money and get better coverage if you were to get Medicare and a Supplement Plan. Don't try to do Medicare alone... speak to a professional! I can help you! -Nick Mangini

Answered by Nick Mangini on September 3, 2025

Broker Licensed in FL, AL, AZ & 32 other states

Answered by Nick Mangini Medicare Insurance Agent

Answered by Michael Andrews on May 14, 2026

Broker Licensed in CT

Answered by Michael Andrews Medicare Insurance Agent
No. When you sign up for Part B you will have to prove that you were insured through your husbands plan.

Answered by Mike Odle on February 17, 2026

Broker Licensed in IN & IL

Answered by Mike Odle Medicare Insurance Agent
Yes, when you’re covered under your spouse’s employer insurance, you’ll need to complete a form later to prove you had credible coverage when you’re ready to enroll in Part B. The main forms are CMS-40B (to request Part B) and CMS-L564 (your employer verifies your coverage). You don’t need to submit them now unless you’re ready to add Part B, but keep them handy. When you are ready for help picking out your health plan, we would be happy to guide you.

Answered by Kate Spilsbury on October 22, 2025

Broker Licensed in FL, AZ, CA & 7 other states

Answered by Kate Spilsbury Medicare Insurance Agent
No, you don't need to prove your coverage is under a group plan. If you stay on his insurance past 65 and then go on Medicare A and B, you will need a Form CMS L564 showing that you had a group health plan. That will prevent any late enrollment penalties from being charged on your Part B premium.

Answered by Mary Green on January 5, 2026

Broker Licensed in AL, CO, FL, GA, TN & VA

Answered by Mary Green Medicare Insurance Agent
The answer is not at this time. When you decide to get your Part B started. Then you will have to prove that you had creditable coverage.

Answered by Jamie Goble on February 16, 2026

Broker Licensed in IL, AR, FL, MD & MO

Answered by Jamie Goble Medicare Insurance Agent
Do I need to sign up for Medicare when I turn 65?

Large Employer: More Than 20 Employees

Generally, if you have job-based health insurance through your (or your spouse’s) current job where the employer has more than 20 employees, then you don’t have to sign up for Medicare. You can wait to sign up until you (or your spouse) stop working or you lose your health insurance (whichever comes first).

Small Employer: Less Than 20 Employees

If the employer has fewer than 20 employees: You might need to sign up for Medicare when you turn 65, even when still working, so you don’t have gaps of creditable coverage and incur Part B and Part D Penalties. Check with the employer.

If you have COBRA Coverage

Sign up for Medicare when you turn 65 to avoid gaps in coverage and a monthly Part B late enrollment penalty. If you have COBRA before signing up for Medicare, your COBRA will probably end once you sign up.

Answered by Mark Sannes on March 5, 2026

Broker Licensed in WA, AK, AZ & 11 other states

Answered by Mark Sannes Medicare Insurance Agent
When you sign up for your part B you will need to prove that you had credible coverage. There are no forms that you need to send in right now.

Answered by Joseph Lipski on September 3, 2025

Broker Licensed in NJ, CA, DE & 17 other states

Answered by Joseph Lipski Medicare Insurance Agent
You would not need to fill out a form until you no longer wish to be covered under your spouses coverage through the employer provided that they are still working.

When you are ready to enroll in part B, use the form L – 564 which is filled out by the HR departmentto show proof of group health coverage, and current employment.

On a brief note, the majority people find that Medicare offers a better option for them when compared to their existing employment coverage. This is a case by case situation.

Answered by Tony Spikes on April 13, 2026

Broker Licensed in GA, AL, FL & 9 other states

Answered by Tony Spikes Medicare Insurance Agent
There is no need to fill out the form until it’s time for you to sign up for part B. At that time, your husbands work will fill out the form showing you had credible coverage from the time you turned 65 and were eligible for part b until you switch over to Medicare. This form insures that you don’t pay a late enrollment penalty for Part B.

Answered by Traci Harward on March 30, 2026

Broker Licensed in UT, AZ, CA & 7 other states

Answered by Traci Harward Medicare Insurance Agent
No, there is no need to fill out a form. However, I recommend letting your group coverage know that you will be starting on Part A.

Later, once you come off your husbands group coverage, then you would sign up for Part B with a Special Enrollment Period (SEP), and state that you have been covered under a group insurance.

Answered by Austin Boyd on September 10, 2025

Agent Licensed in CA, AZ, ID, NV, OR & SC

Answered by Austin Boyd Medicare Insurance Agent
no. as long as its credible coverage you dont have to do anything. just dont accept part b if they auto sign you up if they do then just decline coverage

Answered by Monica McCauley on September 7, 2025

Agent Licensed in FL, AZ, CA & 5 other states

Answered by Monica McCauley Medicare Insurance Agent
Hi You won't need to do anything until your Husband retires and you are going to lose your Group health insurance. Enroll in B and you will want it to start B the same time that your group coverage is ending and have your secondary in place. Once you get the B in place I suggest getting a hold of SS to start that process 2 -3 months prior of your group ending and once you obtain the start date for Part B that it when you sit with an agent and go over your options.

Answered by Shelly Lessard on October 3, 2025

Agent Licensed in OR, UT & WA

Answered by Shelly Lessard Medicare Insurance Agent
You do not need to fill out any form stating you are still covered by your husband's insurance; however, you will be required to show proof of coverage from his employer stating you were covered under his plan when you do elect to enroll in Part B.

Answered by Diana Garner on September 14, 2025

Broker Licensed in KY, FL, IN, OH & TN

Answered by Diana Garner Medicare Insurance Agent
Hello,

When you are ready to sign up for Part B there will be a form, CMS-40B to enroll or you may go to SSA.gov to enroll in Part B only. You will also need to fill out the for CMS-L564 which is completed by you and the employer offering group coverage. This form states you were enrolled in creditable employer group coverage which allows you to enroll in Part B during a Special Election Period. If the coverage offered from the employer was credible you will not have a penalty to pay. Group coverage is usually credible coverage which means it offers the same if not more benefits than Original Medicare.

Answered by Dawn Young on January 20, 2026

Agent Licensed in OK & TX

Answered by Dawn Young Medicare Insurance Agent
You do not need to complete a form at this time. You can delay your Part B coverage as long as you have credible coverage in its place such as group insurance through an employer. When that coverage ends, you will be eligible for a Special Enrollment Period to sign up for Part B.

Answered by Darlene Cerezo Swaffar on October 2, 2025

Broker Licensed in FL

Answered by Darlene Cerezo Swaffar Medicare Insurance Agent
Ask your husband’s employer to provide the CMS L564 form to document that you have employer coverage that Medicare considers to be credible coverage.

Save the form in a file.

Answered by Katheryn Evans on March 2, 2026

Agent Licensed in WA, AZ, CA & 13 other states

Answered by Katheryn Evans Medicare Insurance Agent
Medicare does not require you to provide proof of insurance while you are still working or covered by a working spouse. You will need to provide proof at the time you eventually sign up for Part B.

Answered by Justin Fox on December 29, 2025

Broker Licensed in MT, AZ, CO & 14 other states

Answered by Justin Fox Medicare Insurance Agent
Nor. You will need to document that you had proper coverage when you eventually enroll in Part B or you could be charged a late enrollment fee for both Parts B and D. The same would apply to your husband if he is over age 65.

Best wishes, Wayne

Answered by Wayne Rigby on December 8, 2025

Agent Licensed in UT

Answered by Wayne Rigby Medicare Insurance Agent
Part A is automatically started once you turn 65. If your husband’s coverage is allowing you to stay on, I would contact your local Social Security office and let them know you are delaying your Part B coverage.

Answered by Devin Legleiter on March 17, 2026

Broker Licensed in KS & FL

Answered by Devin Legleiter Medicare Insurance Agent
When you sign up for Medicare part B, they will ask you for your husband's employer to provide a form that shows that you were covered under his plan to avoid any penalties

Answered by Gary Henderson on September 3, 2025

Agent Licensed in TX, AK, AL & 46 other states

Answered by Gary Henderson Medicare Insurance Agent
No, there is no form to state that. Just be careful. The rule from Medicare is that there must be a minimum of 20 people ON the group health plan, so that when you do sign up for Part B, you will not be penalized. When you do sign up for Part B, there's a CMS form that will go to your employer stating that you did have group health insurance, which you will then submit to the SSA, along with your personal CMS form.

Answered by Andrew Kramer on September 16, 2025

Agent Licensed in FL

Answered by Andrew Kramer Medicare Insurance Agent
No, you don't need a form to decline Part B if you're not signing up for it, but you do need to ensure your coverage is creditable to avoid a late penalty later. You can only delay Part B without penalty if you or your spouse are currently employed and you have employer-sponsored group health coverage through that job. You should inform the Social Security Administration that you are delaying Part B because of this coverage, which can be done by contacting them

Answered by Mark Boone on November 29, 2025

Agent Licensed in MN, FL, MI & NC, OH, SC & VA

Answered by Mark Boone Medicare Insurance Agent
No, there is no form necessary to report. You may delay your part B as long as you are covered under a group health plan; you will have no penalty and may add your B later when your group health plan is ending.

Answered by Deborah Webster on January 20, 2026

Broker Licensed in Ia & SC

Answered by Deborah Webster Medicare Insurance Agent
You can sign up for Medicare Part A only and stay on your spouses Work insurance as long as he is working and the coverage is credible coverage. Credible coverage is defined coverage as good as Medicare coverage. You do not need to notify Medicare at this time. When you are ready to go onto Medicare Part B there is a form that you will fill out "form cms-408 and there is a form that his employer will fill out "cms-L564" verifying you have coverage since you were eligible for Medicare. You should start this process 3 months before the date you want Medicare B effective.

Answered by Karen Ansell on March 9, 2026

Agent Licensed in FL, GA, KY & OH

Answered by Karen Ansell Medicare Insurance Agent
I would recommend that you contact your nearest social security office or Medicare. Advise them you have enrolled into Medicare A (Hospitalization) Tell them you are delaying enrollment into Part B (Medical) I also recommend contacting the benefits administrator at your husband's work to make sure your husband's plan is considered "credible coverage" by Medicare.

Answered by Brent Mowery on September 2, 2025

Broker Licensed in OK, CO, NC & TX

Answered by Brent Mowery Medicare Insurance Agent
You will want to to complete a form that proves you had credible coverage when you do go to enroll in Part B. The form is called CMS-L564 which is a request for employment information. You will need to fill this out with yours and your spouses information. You will also need to have your spouses employer fill out section B of the form. You will submit this with your CMS-40B form which is your application for Part B. You can find these forms at CMS.gov. I also recommend obtaining a written statement from your spouses employer stating the coverage is credible for Part B and Part D.

Answered by Ashley King on November 23, 2025

Broker Licensed in MD, AL, AR & 9 other states

Answered by Ashley King Medicare Insurance Agent
Yes there is but you don't need to fill it out until you're within about 90 days of leaving his plan and making the switch to Medicare. You can continue on his insurance for as long as you need/want to and then make sure to give yourself a few months (we recommend 90-120 days, depending on what time of year it is) to get that form and your Part B application form turned in.

Answered by Abigail Turner on September 3, 2025

Broker Licensed in KS, AR, AZ & 13 other states

Answered by Abigail Turner Medicare Insurance Agent
To answer your question with as little confusion as possible the answer is yes.

With that being said you will not need the form until you are ready to sign up for part B. The form is to let them know that you had other qualified part B coverage.

Answered by Chauncey Bragg on October 15, 2025

Broker Licensed in OH

Answered by Chauncey Bragg Medicare Insurance Agent
No. You just need to contact Social Security and tell them to defer your Medicare Part B as you still have credible medical insurance. Once your husbands insurance will not longer cover you, you need to contact Social Security and ask them to turn on your Medicare Part B coverage.

Answered by Greg Strasma on October 30, 2025

Agent Licensed in GA

Answered by Greg Strasma Medicare Insurance Agent
Verify your husband’s insurance is credible insurance in the eyes of Medicare. The point in time you will need a letter from his employer is when you’re ready to sign up for part B.

Answered by Donald Baker on October 20, 2025

Agent Licensed in MN

Answered by Donald Baker Medicare Insurance Agent
No, there is nothing you need to do or fill out. There are a couple of considerations you should take into account however. The first is that your husband works for a large employer (more than 20 employees) for his coverage to be considered creditable coverage. The second is if you are both on a high deductible health plan and contributing to an HSA, then you don’t want to be enrolled in Part A because there are tax implications.

Answered by Joni Kattau on March 23, 2026

Broker Licensed in TX & AZ

Answered by Joni Kattau Medicare Insurance Agent
There is no need to fill out a Federal one-page form until you are ready to sign up for Part B. As long as you are on your husband's insurance and he is still working, you need not do anything.

Answered by Doris Youngman on May 26, 2026

Agent Licensed in FL, AL & GA

Answered by Doris Youngman Medicare Insurance Agent
Not at this time, no. However, if your husband leaves this employer or retires, you will need a completed CMS Form L-564, Medicare Request for Employment Information. The form needs to be completed by the employer who carries the coverage you are on. You will need this for any additional employers as well, if he changes jobs. This form is what prevents you from incurring a Part B late enrollment penalty.

Answered by Kimberly Griego on October 2, 2025

Agent Licensed in WA, AZ, CA & 5 other states

Answered by Kimberly Griego Medicare Insurance Agent
You don’t need to fill out any form right now. Medicare doesn’t require proof while you’re still covered under your spouse’s employer plan. When you’re ready to sign up for Part B later, you’ll complete the CMS-L564 form (Request for Employment Information) to show you had employer coverage and avoid any penalty. Connect with a local agent and they can help you navigate the process. It doesn't cost anything to work with an agent.

Answered by Andrew Dooly on April 13, 2026

Broker Licensed in NC, CT, GA & 6 other states

Answered by Andrew Dooly Medicare Insurance Agent
You don't need to complete any forms to say that you are currently on your husband's health insurance if it is credible coverage. When you are ready to leave his employer coverage and you are ready to sign up for Medicare Part B, You will need to complete a form with your husband's employer to show that you had credible health care coverage to the employer.

Answered by Amanda Holder on September 3, 2025

Broker Licensed in FL, AZ, NC & VA

Answered by Amanda Holder Medicare Insurance Agent
You do not, once you apply for Medicare part B, Medicare will require proof of employer coverage like a W-2, or letter from the employer, or insurance company.

Answered by Amine Amraoui on November 15, 2025

Agent Licensed in FL

Answered by Amine Amraoui Medicare Insurance Agent
If you’re still covered under your husband’s employer insurance, you don’t need to do anything right now other than keep proof of that coverage. There’s no separate form required just to let Medicare know you’re still on his plan.

However, when you’re ready to enroll in Part B later (for example, when his employer coverage ends), you’ll need to submit two forms to avoid a late enrollment penalty:

• CMS-40B (Application for Enrollment in Medicare Part B)

• CMS-L564 (Request for Employment Information) — this form is completed by your husband’s employer to confirm your coverage.

For now, just keep records of your current insurance, and you’ll use those forms when you decide to add Part B.

Answered by Nkechi Nwankwonta on October 29, 2025

Agent Licensed in TX, AZ, CA & 18 other states

Answered by Nkechi Nwankwonta Medicare Insurance Agent
No. However, you will need to keep proof of your coverage through your husband- indefinitely. When the time comes and you are no longer covered through your husband, Medicare will be quick to try and charge you a penalty for seemingly not having prescription coverage. This goes for changes in Medicare plans after you start receiving coverage. You may have to prove you had coverage through your husband for the time in question, all over again.

Answered by Edward Carpenter on January 12, 2026

Broker Licensed in FL

Answered by Edward Carpenter Medicare Insurance Agent
NO, no form to fill until you are going to enroll in part b and you have to proof that you qualify for SEP if it's the case

Answered by Oberto Ramirez on June 2, 2026

Agent Licensed in FL

Answered by Oberto Ramirez Medicare Insurance Agent
When you come off your husbands plan and are ready to enroll in part B, there is a form to give his employer to sign stating that you had credible coverage and you will submit that to Social Security so you don’t get a penalty, but you don’t need to do anything right now

Answered by Cheryl Canty on November 23, 2025

Agent Licensed in CA, NJ & WA

Answered by Cheryl Canty Medicare Insurance Agent

Tags: Medicare Part A Medicare Part B The Medicare System

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