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Medicare Coordination of Benefits

IRS/SSA/CMS Data Match







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What Is Data Match?


Congress enacted a law (Section 6202 of the Omnibus Budget Reconciliation Act of 1989) to provide the Centers for Medicare & Medicaid Services (CMS), formerly the Health Care Financing Administration, with better information about Medicare beneficiaries’ group health plan (GHP) coverage.

The law requires the Internal Revenue Service (IRS), the Social Security Administration (SSA), and CMS to share information that each agency has about whether Medicare beneficiaries or their spouses are working. The process for sharing this information is called the IRS/SSA/CMS Data Match.

The purpose of the Data Match is to identify situations where another payer may be primary to Medicare.

Employers are required to complete a questionnaire that requests GHP information on identified workers who are either entitled to Medicare or married to a Medicare beneficiary. This information is used to identify the primary and secondary payers for medical services provided to a Medicare beneficiary. This process helps Medicare identify claims on an ongoing basis for which Medicare should not be the primary payer.

The Data Match Project has saved the Medicare Trust Funds more than 3.5 billion dollars to date.

What Are the Reporting Requirements of Data Match?


Employers must provide CMS with information regarding health coverage of their Medicare-eligible workers and spouses of Medicare-eligible individuals whenever CMS identifies those individuals to the employer. Generally, the questionnaire asks if each named individual worked during a specific time period and, if so, whether he or she had employer-sponsored GHP coverage. Employers must respond within 30 days of the initial inquiry, unless an extension has been requested and approved.

To assist you with completing the questionnaire, a copy of the instruction booklet is available electronically. For more details, you may view or print the instructions for completing the Group Health Plan Report for the IRS/SSA/CMS Data Match here.

A hard copy of the instruction booklet can be mailed to you upon request. In order for your request to be processed, you will need to provide the 10-digit Request Number that appears on the cover letter you received with your Data Match questionnaire. Click here to order an instruction booklet.

As an alternative to the Data Match, employers should consider the benefits of entering into an Employer Voluntary Data Sharing Agreement with CMS to exchange GHP and Medicare entitlement data.

A sample Data Match questionnaire may be viewed below:

File Description File Name File Size Format
Part I, Page 1 Dm9pt1pg1.pdf 49 KB PDF
Part I, Page 2 Dm9pt1pg2.pdf 30 KB PDF
Part II, Page 1 Dm9pt2pg1.pdf 251 KB PDF
Part III Dm9pt3.pdf 328 KB PDF
Part IV Dm9pt4.pdf 206 KB PDF


What Are the Penalties for Not Completing a Questionnaire?


The CMS may take the following actions against an employer that willfully or repeatedly fails to comply with CMS’s request by:

  • Assessing a civil monetary penalty of $1,000 for each person named in the inquiry for whom the employer has either not responded or provided incomplete information {pursuant to 42 USC Section 1395y(b)(5)};
  • Subpoenaing business records and members of the organization to enforce compliance with law {pursuant to 42 USC Sections 405(d) and 1395(ii)}; and
  • Investigating the employer’s GHP or large group health plan (LGHP) for a determination of nonconformance and, if so found, make a referral to the IRS for imposition of an excise tax on the employer {pursuant to Section 5000 of the Internal Revenue Code and 42 CFR Section 411.100 et seq.}.

How Do I Request an Extension?


Contact the Coordination of Benefits (COB) Contractor’s toll-free telephone numbers: 1-800-999-1118 or TTY/TDD: 1-800-318-8782 for the hearing and speech impaired, Monday through Friday, from 8:00 a.m. to 8:00 p.m., Eastern Time, except holidays, to request a 30-day extension. Requests for extensions beyond 60 days (the original 30 days and one 30-day extension) generally are not granted to any employer that is reporting on less than 150 workers (see Part III of the Data Match report). Extensions will be reviewed on a case-by-case basis for those employers reporting on more than 150 workers. Requests for extensions beyond the 60-day period must be submitted by letter detailing the reasons and sent to:

MEDICARE - Coordination of Benefits
IRS/SSA/CMS Data Match Project
P.O. Box 125
New York, NY 10274-0125

Employer Voluntary Data Sharing Agreements


Numerous Fortune 500 companies and other large employers have already entered into Voluntary Data Sharing Agreements (VDSAs) with CMS to share coverage information. As an employer, you too can obtain the substantial benefits produced by entering into a VDSA. Participating in the VDSA program will allow your organization to eliminate its requirement to complete IRS/SSA/CMS Data Match questionnaires, eliminate repayment of claims and associated penalties, and improve service to you and your Medicare-entitled employees.

The VDSAs allow you to electronically exchange Medicare and group health plan (GHP) entitlement information with the Centers for Medicare & Medicaid Services (CMS). By entering into a VDSA, you agree to share GHP coverage entitlement information on employees and their spouses. In exchange, CMS agrees to provide the employer with Medicare entitlement information for identified Medicare individuals. For more information, follow this link to view an Employer Voluntary Data Sharing Agreement.

Insurer Voluntary Data Sharing Agreements


Insurers are an excellent source of GHP information. Recognizing this, CMS has entered into Voluntary Data Sharing Agreements (VDSAs) with many insurers to share coverage data. If all GHP insurers had VDSAs with CMS, this would reduce the need for employers to provide insurance information via the IRS/SSA/CMS Data Match questionnaires. Ask your insurer to enter into a VDSA with CMS.

The VDSAs produce substantial benefits for the insurer and its employer customers. This information exchange can streamline the administration of insurance processes, eliminating the need for repayment negotiations and possible penalties. Such agreements ensure that all insurers involved in benefits payment, including Medicare, pay primary when appropriate. For more information, follow this link to view an Insurer Voluntary Data Sharing Agreement.


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Last Modified on Friday, September 17, 2004