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The CMS-40B form plays a crucial role in the realm of healthcare, particularly for those seeking to enroll in Medicare Part B. This form serves as an application for individuals who wish to obtain medical insurance coverage through the federal program. It is essential for new enrollees, as well as those who may have missed their initial enrollment period. By filling out the CMS-40B, applicants can provide necessary personal information, such as their name, address, and Social Security number, which helps streamline the enrollment process. Additionally, the form includes sections where individuals can indicate their eligibility and any special circumstances that may apply to their situation. Understanding the significance of this form is vital for anyone navigating the Medicare system, ensuring that they receive the benefits they need without unnecessary delays.

Sample - CMS-40B Form

Request for Enrollment in Medicare Part B (Medical Insurance)

Use this form if you already have Medicare Part A and want to sign up for Part B (Medical Insurance). You can use this form to sign up for Part B during these times:

During your Initial Enrollment Period

During the General Enrollment Period from January 1–March 31 each year

If you’re eligible for a Special Enrollment Period

If you don’t have Part A, don’t complete this application. Contact Social Security to apply for Medicare for the first time.

Visit Medicare.gov/basics/get-started-with-medicare to learn more about when you can sign up for Medicare, when your coverage can start, and special situations for people under 65 with a disability.

Submit your form by mail or fax

Mail or fax your completed, signed form to your local Social Security office. Find an office near you at SSA.gov/locator.

Get help with this form

Phone: Call Social Security at 1-800-772-1213. TTY users call 1-800-325-0778.

En Español: Llame a SSA gratis al 1-800-772-1213 y oprima el 2 si desea el servicio en Español y espere a que le atienda un agente.

For an office near you visit SSA.gov/locator.

State Health Insurance Assistance Program (SHIP): Visit shiphelp.org to get free, personalized, and unbiased health insurance counseling from your local SHIP.

Get information in another format

You have the right to get Medicare information in an accessible format, like large print, braille, or audio. You also have the right to file a complaint if you feel you’ve been discriminated against. Visit Medicare.gov/about-us/accessibility-nondiscrimination-notice, or call 1-800-MEDICARE (1-800-633-4227) for more information. TTY users can call 1-877-486-2048.

CMS-40B (07/2025)

U.S. Department of Health and Human Services

Form Approved

OMB No. 0938-1230

Centers for Medicare & Medicaid Services

Expires: 07/31/2028

 

 

 

Request for Enrollment in Medicare Part B (Medical Insurance)

Section 1: Basic information

1. Medicare Number

2. First name

Middle name

Last name

Suffix

3. Mailing address (number and street, P.O. Box, or route)

City

State

 

ZIP code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Phone number

5. Email address

Section 2: Enrollment in Medicare Part B

1. Do you have (or did you have) coverage through an employer or union group health plan

 

since you turned 65? (If yes, complete item 3.)

Yes  No

Note: If you sign up for Part B, you must pay premiums for every month you have the coverage.

2. Are you currently (or were you) an international volunteer for a non-profit organization that

 

provided health coverage to you? (If yes, complete item 3.)

Yes  No

3.Enter dates of employment (or volunteer work) and health coverage (enter dates as mm/yyyy). Attach a separate sheet if you need more space. Have your employer fill out the form CMS-L564 (Request for Employment Information) and return it with your application.

Dates you (or your spouse) worked for an employer that provided health coverage

Start date:

  End date:

Not ended

Dates you worked as a volunteer outside the U.S.

Start date:

  End date:

Not ended

Dates of health coverage from employer (or non-profit organization)

Start date:

  End date:

Not ended

4.Has an employer, health insurance provider, or other entity asked or required you to enroll in Part B? (If yes, explain how and why in the space below, and include proof or documentation

with this form.)

Yes  No

Choose your coverage start date

If you’re enrolling in Medicare while you’re still covered by a group health plan based on current employment (or during the first full month you’re not enrolled in the group health plan), you can choose when your Medicare coverage will start. Choose one:

The first day of the month you enroll

The first day of any of the 3 months after you enroll. Write the month and year you want coverage to start: (mm/yyyy)

CMS-40B (07/2025)

1

Section 3: Signature(s)

1. Signature of applicant

2. Date signed (mm/dd/yyyy)

If this form has been signed by mark (X), a witness who knows the person applying must also sign below:

3. Name of witness (first and last name)

4. Signature of witness

5. Date signed (mm/dd/yyyy)

Submit your form by mail or fax

Mail or fax your completed, signed form to your local Social Security office. Find an office near you at SSA.gov/locator.

Privacy Act Statement: Sections 1837, 1838 and 1872 of the Social Security Act, as amended, allow SSA to collect this information. Furnishing this information is voluntary. However, failing to provide all or part of the information may prevent an accurate and timely decision on any claim filed for medical insurance and/or hospital insurance.

We will use the information you provide to determine your eligibility for benefits. We may also share the information for the following purposes, called routine uses: 1) To Federal, State, or local agencies (or agents on their behalf) for administering income maintenance or health maintenance programs (including programs under the Social Security Act). Such disclosure includes, but are not limited to, release of information to: Railroad Retirement Board for administering provision of the Railroad Retirement Act relating to railroad employment; for administering the Railroad Unemployment Insurance Act and for administering provisions of the Social Security Act relating to railroad employment; 2) Department of Veterans Affairs for administering 38 U.S.C. 1312, and upon request, for determining eligibility for, or amount of, veterans benefits or verifying other information with respect thereto pursuant to 38 U.S.C. 5106; 3) State welfare departments for administering sections 205(c)(2)(B)(i)(II) and 402(a)(25) of the Social Security Act requiring information about assigned Social Security numbers for Temporary Assistance for Needy Families (TANF) program purposes and for determining a recipient’s eligibility under the TANF program; and 4) State agencies for administering the Medicaid program.

To contractors and other Federal agencies, as necessary, for the purpose of assisting the Social Security Administration (SSA) in the efficient administration of its programs. We will disclose information under the routine use only in situations in which SSA may enter into a contractual or similar agreement with a third party to assist in accomplishing an agency function relating to this system of records.

In addition, we may share this information in accordance with the Privacy Act and other Federal laws. For example, where authorized, we may use and disclose this information in computer matching programs, in which our records are compared with other records to establish or verify a person’s eligibility for Federal benefit programs and for repayment of incorrect or delinquent debts under these programs.

A list of additional routine uses is available in our Privacy Act System of Records Notice (SORN) 60-0090, entitled Master Beneficiary Record, as published in the Federal Register (FR) on January 11, 2006, at 71 FR 1826. Additional information, and a full listing of all of our SORNs, is available on our website at SSA.gov/privacy.

CMS will maintain records received during eligibility determinations from SSA in a CMS System of Records, the Medicare Beneficiary Database (MBD) SORN 09-70-0536 as published in the Federal Register (FR) on February 14, 2018, at 71 FR 11420. Additional information on CMS SORNs and permissible Routine Uses for disclosure can be located at our Privacy website HHS.gov/foia/privacy/sorns/index.html.

Paperwork Reduction Act: According to the Paperwork Reduction Act of 1995, no persons are required to respond to a collection of information unless it displays a valid OMB control number. The valid OMB control number for this information collection is 0938-1230. The time required to complete this information is estimated to average 15 minutes per response, including the time to review instructions, search existing data resources, gather the data needed, and complete and review the information collection. If you have any comments concerning the accuracy of the time estimate(s) or suggestions for improving this form, please write to: CMS, Attn: PRA Reports Clearance Officer, 7500 Security Boulevard, Baltimore, Maryland 21244-1850. Important: Do not send this form or any items with your personal information (such as claims, payments, medical records, etc.) to the PRA Reports Clearance Office. Any items we get that aren’t about how to improve this form or its collection burden (outlined in OMB 0939-0251) will be destroyed. It will not be kept, reviewed, or forwarded to Social Security or any other agency.

CMS-40B (07/2025)

2

File Specs

Fact Name Description
Purpose The CMS-40B form is used to apply for Medicare Part B coverage.
Eligibility Individuals aged 65 or older, or those under 65 with certain disabilities, can use this form.
Submission Method The form can be submitted online, by mail, or in person at a local Social Security office.
Governing Law This form is governed by federal laws related to Medicare and Social Security.
Filing Deadlines Applications should be submitted during the Initial Enrollment Period, which starts three months before turning 65.
Information Required Applicants must provide personal information, including name, address, and Social Security number.
Processing Time It typically takes about 30 days to process the application once submitted.
Impact of Late Enrollment Delaying enrollment may result in a late enrollment penalty, which increases monthly premiums.
Assistance Available Individuals can seek help from local Social Security offices or Medicare counseling services.
Updates and Changes The form may be updated periodically; it's important to use the most current version available.

CMS-40B - Usage Guidelines

After you complete the CMS-40B form, you will need to submit it to the appropriate office for processing. Make sure to keep a copy for your records. Follow these steps to fill out the form accurately.

  1. Start by entering your personal information at the top of the form. This includes your name, address, and contact information.
  2. Provide your Social Security number in the designated section.
  3. Indicate your date of birth using the format specified on the form.
  4. Fill in your Medicare number, if applicable.
  5. Answer all questions regarding your eligibility and coverage. Be honest and thorough.
  6. Review your responses to ensure accuracy.
  7. Sign and date the form at the bottom.
  8. Make a copy of the completed form for your records.
  9. Submit the form to the address specified in the instructions.

Your Questions, Answered

What is the CMS-40B form?

The CMS-40B form is an application used by individuals to enroll in Medicare Part B. This form is essential for those who are eligible for Medicare and wish to receive coverage for outpatient care, preventive services, and other health-related benefits under Part B.

Who should fill out the CMS-40B form?

Individuals who are eligible for Medicare and want to enroll in Part B should complete the CMS-40B form. This includes people turning 65, those under 65 with certain disabilities, and individuals with End-Stage Renal Disease (ESRD) or Amyotrophic Lateral Sclerosis (ALS).

How can I obtain the CMS-40B form?

You can download the CMS-40B form from the official Medicare website. Alternatively, you can request a paper form by calling the Medicare helpline or visiting your local Social Security office.

What information do I need to provide on the CMS-40B form?

The form requires basic personal information, including your name, address, Social Security number, and date of birth. You will also need to indicate whether you are applying for yourself or someone else and provide relevant details about the individual.

When should I submit the CMS-40B form?

It’s best to submit the CMS-40B form during your initial enrollment period, which begins three months before you turn 65 and ends three months after your birthday month. If you miss this window, you can still apply during the general enrollment period, but coverage may not start until July 1.

Can I submit the CMS-40B form online?

Currently, the CMS-40B form cannot be submitted online. You will need to print the completed form and mail it to your local Social Security office or deliver it in person.

What happens after I submit the CMS-40B form?

After you submit the form, Social Security will process your application. You should receive a confirmation of your enrollment in Medicare Part B, along with your Medicare card, typically within a few weeks. If there are any issues, they will contact you for clarification.

Is there a fee associated with enrolling in Medicare Part B using the CMS-40B form?

Yes, there is a monthly premium for Medicare Part B. The amount can vary based on your income. Be sure to review the current premium rates when you apply, as they may change each year.

What if I change my mind after submitting the CMS-40B form?

If you change your mind about enrolling in Medicare Part B after submitting the form, you can withdraw your application. However, you should do so promptly and follow the instructions provided by Social Security to ensure your request is processed correctly.

Where can I get help if I have questions about the CMS-40B form?

If you have questions about the CMS-40B form or the enrollment process, you can contact the Medicare helpline or visit your local Social Security office. They can provide assistance and clarify any concerns you may have.

Common mistakes

  1. Not providing complete personal information. Many people forget to include their full name, address, or Social Security number. This can lead to delays in processing.

  2. Failing to sign the form. A signature is crucial. Without it, the form is considered incomplete, and the application cannot proceed.

  3. Incorrectly reporting income. Some individuals miscalculate their income or fail to include all sources. This can affect eligibility for certain benefits.

  4. Not checking for updates. Regulations and requirements can change. It’s important to ensure you have the most current version of the CMS-40B form.

  5. Overlooking deadlines. Submitting the form late can result in missed benefits. Keep track of important dates to avoid this mistake.

Documents used along the form

The CMS-40B form is an essential document used in the context of Medicare, specifically for those applying for or changing their Medicare Part B coverage. However, several other forms and documents often accompany this form to ensure a smooth application process. Below is a list of these related documents, each playing a vital role in the overall procedure.

  • CMS-1490S: This is the application for Extra Help with Medicare Prescription Drug Plan Costs. It helps individuals who may qualify for assistance in paying their prescription drug costs.
  • CMS-855I: This form is used by healthcare providers to enroll in Medicare. It is essential for ensuring that providers can bill Medicare for services rendered.
  • CMS-10114: This document serves as a request for a Medicare card. Individuals may need it if they have lost their card or never received one.
  • CMS-40: This form is used for applying for Medicare Part A. It is crucial for individuals who are also seeking hospital insurance coverage.
  • CMS-21: This is the form for applying for Medicare Savings Programs. It assists those who may need help with their Medicare premiums and out-of-pocket costs.
  • CMS-10291: This form is utilized for reporting changes in circumstances that may affect Medicare coverage, such as income changes or changes in residency.
  • CMS-1763: This document is a request for a voluntary termination of Medicare Part B coverage. It is important for individuals who no longer wish to maintain their Part B enrollment.
  • CMS-10132: This form is used to apply for the Medicare Advantage program. It allows individuals to enroll in a private health plan that provides Medicare benefits.
  • CMS-40B Instructions: While not a form itself, these instructions provide guidance on how to properly complete the CMS-40B form, ensuring accuracy in the application process.

Understanding these related forms and documents is crucial for anyone navigating the Medicare system. Each one serves a specific purpose and can significantly impact an individual's healthcare coverage and benefits. If you have questions about any of these documents, seeking assistance can help clarify the process and ensure that all necessary paperwork is completed correctly.

Similar forms

The CMS-40B form is used by individuals to apply for Medicare Part B coverage. It is similar to the CMS-40 form, which is the application for Medicare Part A. Both forms serve as crucial entry points for individuals seeking Medicare benefits, but while the CMS-40B focuses on outpatient and preventive services under Part B, the CMS-40 is geared towards inpatient hospital services under Part A. Each form requires personal information and verification of eligibility, making them essential for accessing Medicare services.

Another document akin to the CMS-40B is the SSA-1, which is the application for Social Security benefits. Like the CMS-40B, the SSA-1 requires detailed personal information, including work history and income. Both forms are often completed during the same time frame, especially for individuals nearing retirement age. They share a similar purpose: to ensure that applicants receive the benefits they are entitled to based on their contributions to the system.

The CMS-L564 form, which is used to request proof of employment for Medicare, also shares similarities with the CMS-40B. While the CMS-40B is about applying for coverage, the CMS-L564 helps verify eligibility based on employment status. Both forms require the submission of specific documentation to confirm eligibility, underscoring the importance of accurate record-keeping in the Medicare application process.

The Medicare Advantage Plan Enrollment Form is another document that resembles the CMS-40B. This form allows individuals to enroll in a Medicare Advantage Plan, which provides an alternative to traditional Medicare. Both forms require personal information and a declaration of eligibility. While the CMS-40B is focused solely on Medicare Part B, the enrollment form for Medicare Advantage incorporates elements of both Part A and Part B, reflecting a broader scope of coverage.

The CMS-855I form, used by healthcare providers to enroll in Medicare, is also similar in nature. While it targets providers rather than individuals, both forms aim to facilitate access to Medicare services. The CMS-855I requires providers to submit their qualifications and practice information, similar to how the CMS-40B requires individuals to submit their personal and eligibility details.

The Medicaid Application form is another related document. Individuals often apply for both Medicare and Medicaid, especially those with limited income. The Medicaid Application collects information about financial status and household composition, similar to the CMS-40B's focus on eligibility criteria for Medicare Part B. Both applications are essential for determining the level of healthcare coverage an individual may receive.

The VA Form 10-10EZ, which is used to apply for healthcare benefits through the Veterans Affairs, shares some similarities with the CMS-40B. Both forms require personal information and verification of eligibility. While the CMS-40B is specific to Medicare, the VA Form 10-10EZ is tailored for veterans, emphasizing the need for accurate information in accessing healthcare benefits.

The Application for Supplemental Security Income (SSI) is another document that parallels the CMS-40B. Like the CMS-40B, the SSI application assesses eligibility based on financial and personal circumstances. Both applications are crucial for individuals who may need additional support, particularly for those with limited resources who are also navigating the Medicare system.

The Form 1040, the U.S. Individual Income Tax Return, also bears some resemblance to the CMS-40B in that both require detailed personal information. While the Form 1040 is focused on income and tax obligations, it often includes information relevant for determining eligibility for various government programs, including Medicare. Accurate reporting on both forms is vital for ensuring that individuals receive the benefits for which they qualify.

Lastly, the Form 8962, used for claiming the Premium Tax Credit, is similar to the CMS-40B in that it deals with healthcare coverage. This form requires information about income and household size, which can also impact eligibility for Medicare. Both forms aim to assist individuals in navigating the complexities of healthcare benefits, ensuring they receive the necessary support based on their circumstances.

Dos and Don'ts

When filling out the CMS-40B form, attention to detail is crucial. Here is a list of ten important dos and don'ts to consider:

  • Do read the instructions carefully before starting.
  • Do provide accurate personal information, including your full name and address.
  • Do double-check your Social Security number for accuracy.
  • Do ensure that all required fields are completed.
  • Do keep a copy of the completed form for your records.
  • Don't leave any sections blank unless instructed.
  • Don't use correction fluid on the form; it can cause processing delays.
  • Don't forget to sign and date the form before submission.
  • Don't submit the form without reviewing it for errors.
  • Don't ignore any additional documentation requirements specified in the instructions.

Misconceptions

The CMS-40B form is an important document used in the Medicare program, specifically for individuals who wish to apply for or change their Medicare Part B coverage. However, there are several misconceptions surrounding this form that can lead to confusion. Here are five common misunderstandings:

  • The CMS-40B form is only for new Medicare applicants. Many people believe that this form is exclusively for those who are applying for Medicare for the first time. In reality, it can also be used by individuals who are already enrolled in Medicare and wish to make changes to their coverage.
  • Submitting the CMS-40B form guarantees immediate coverage. Some individuals think that once they submit the form, their Medicare Part B coverage will start right away. However, there are specific enrollment periods, and coverage may not begin until the designated start date.
  • Only seniors can use the CMS-40B form. While it is true that many Medicare recipients are seniors, younger individuals with certain disabilities can also apply for Medicare using this form. Age is not the only factor in eligibility.
  • Completing the CMS-40B form is complicated. Many people shy away from filling out the CMS-40B because they think it is too complex. In fact, the form is designed to be straightforward, and assistance is available for those who need help.
  • Once submitted, the CMS-40B form cannot be changed. Some individuals fear that they cannot make changes after submitting the form. However, there are options for correcting or updating information if needed, depending on the circumstances.

Understanding these misconceptions can help individuals navigate the Medicare system more effectively and ensure they receive the coverage they need.

Key takeaways

The CMS-40B form is essential for individuals seeking to apply for or change their Medicare benefits. Here are key takeaways to consider when filling out and using this form:

  • Understand the Purpose: The CMS-40B form is used to apply for Medicare Part B, which covers outpatient care, preventive services, and some home health services.
  • Eligibility: Ensure you meet the eligibility requirements before submitting the form. Typically, you must be 65 years or older or have a qualifying disability.
  • Gather Necessary Information: Collect personal information such as your Social Security number, date of birth, and contact details. Accurate information is crucial.
  • Complete the Form Accurately: Fill out the form carefully. Any mistakes or omissions can delay your application process.
  • Submit on Time: Pay attention to deadlines. Submitting the form late can result in delayed coverage or higher premiums.
  • Check for Confirmation: After submission, confirm that your application has been received. This can prevent issues down the line.
  • Keep Copies: Always retain a copy of your completed CMS-40B form and any correspondence related to your application.
  • Seek Assistance if Needed: If you have questions or need help, consider reaching out to a Medicare representative or a trusted advisor.

By following these key takeaways, you can navigate the process of applying for Medicare Part B more effectively.