Medicare Secondary Payer Manual (Pub. 100-05), Ch. 1 § 20.4
Workers' Compensation (WC)
20.4 - Workers' Compensation (WC)
(Rev. 11755, Issued:12-21-22, Effective: 01-23-23, Implementation: 01-23-23)
Medicare is secondary to WC plans (including black lung benefit programs), pursuant to 42
CFR § 411.40. Payment under Medicare may not be made for any items and services to the
extent that payment has been made or can reasonably be expected to be made for such items
or services under a WC law or plan of the United States or any State. If it is determined
that Medicare has paid for items or services that can be or could have been paid under WC,
the Medicare payment constitutes mistaken payment.
This limitation also applies to the WC plans of the District of Columbia, American Samoa,
Guam, Puerto Rico, and the Virgin Islands. It also applies to the Federal WC plans
provided under the Federal Employees' Compensation Act, the U.S. Longshoremen's and
Harbor Workers' Compensation Act and its extensions, and the
Federal Coal Mine Health and Safety Act of 1969 as amended (the Federal Black Lung
Program). These Federal programs provide WC protection for Federal civil service
employees and certain other categories of employees not covered, or not adequately
covered, under State WC programs, e.g., coal miners totally disabled due to
pneumoconiosis, maritime workers (with the exception of seamen), employees of companies
performing overseas contracts with the United States government, employees of American
companies who are injured in an armed conflict, employees paid from non-appropriated
Federal funds (such as employees of post-exchanges), and offshore oil field workers. The
Federal Employers' Liability Act (FELA), which covers merchant seamen and employees of
interstate railroads, is not a WC law or plan for purposes of this exclusion. Similarly, some
States have employers' liability acts. These also are not considered WC acts for purposes of
this exclusion. The FELA and similar State acts are considered liability insurance under
the MSP liability provisions.
All WC acts require that the employer furnish the employee with necessary medical and
hospital services, medicines, transportation, apparatus, nursing care, and other necessary
restorative items and services. However, in some States there are limits to the amount of
medical and hospital care provided. For specific information regarding the WC plan of a
particular State or territory, contact the appropriate agency of that State or territory.
If payment for services cannot be made by WC because they were furnished by a source
not authorized by WC, such services can be paid for by Medicare.
The beneficiary is responsible for taking whatever action is necessary to obtain payment
under WC where payment under that system can reasonably be expected (e.g., timely filing
a claim, furnishing all necessary information). If failure to take proper and timely action
results in a loss of WC benefits, Medicare benefits are not payable to the extent that
payment could reasonably have been expected under WC. See 42 CFR § 411.43.