Medicare Secondary Payer Manual (Pub. 100-05), Ch. 2 § 10
MSP Provisions for Working Aged Individuals
10 -MSP Provisions for Working Aged Individuals
(Rev. 11755, Issued:12-21-2022, Effective: 01-23-2023, Implementation: 01-23-23)
Pursuant to 42 CFR § 411.100, and further specified in § 411.170 and § 411.172,
Medicare pays secondary to GHP coverage for individuals age 65 or over if the GHP
coverage is by virtue of the individual's current employment status or the current
employment status of the individual's spouse. Health insurance plans for retirees or the
spouses of retirees do not meet this condition and are not primary to Medicare. The law
requires employers (as defined in Pub. 100-05, Chapter 1) to offer to their employees
age 65 or over and to the age 65 or over spouses of employees of any age the same
coverage as they offer to employees and employees' spouses under age 65. For example,
a plan may not provide benefits that are less for individuals age 65 or over or charge
policyholders premiums that are higher for individuals age 65 or over since this would
create an incentive for these individuals to reject the GHP coverage and make Medicare
the primary payer. This provision applies whether or not the individual age 65 or over is
entitled to Medicare. This equal benefit rule applies to coverage offered to full-time and
part-time employees. CMS accepts that an individual attains a particular age on the day
preceding his or her birthday.
Medicare beneficiaries who have current employment status are free to reject employer
plan coverage, in which case they retain Medicare as their primary coverage in
accordance with 42 CFR § 411.172. If the employee or spouse refuses the plan Medicare
is primary payer for that individual; and the plan may not offer that individual coverage
complementary to Medicare. The requirements for employer compliance with the MSP
provisions may differ in some respects from the requirements for compliance with the
Age Discrimination in Employment Act (ADEA). For example, the ADEA law applies
only to employees, while the Medicare provision applies also to self-employed
individuals. Employers may not sponsor or contribute to individual Medigap or
Medicare supplement policies for beneficiaries who have or whose spouse has current
employment status, as outlined in 42 CFR § 411.108.
Where a GHP is primary payer, but does not pay in full for the services, secondary
Medicare benefits may be paid to supplement the amount it paid for Medicare-covered
services. If a GHP denies payment for services because they are not covered by the plan
as a plan benefit bought for all covered individuals, primary Medicare benefits may be
paid if the services are covered by Medicare. Primary Medicare benefits may NOT be
paid if the plan denies payment because the plan does not cover the service for primary
payment when provided to Medicare beneficiaries. (See 42 CFR § 411.108.)
A GHP's decision to pay or deny a claim because the services are or are not medically
necessary is not binding on Medicare. A/B MACs and DME MACs evaluate claims under
existing guidelines derived from the law and regulations to assure that Medicare covers the
services regardless of any employer plan involvement.
A/B MACs and DME MACs assume for developing claims and the requirement that
GHPs be billed before Medicare that, in the absence of evidence to the contrary, an
employer in whose health plan a beneficiary is enrolled because of employment meets the
definition of employer and employs at least 20 people. The A/B MACS or DME MAC
refers an employer’s allegation that the 20-employee requirement is not met to the MSP
contractor for coordination of benefits.
A/B MACs and DME MACs must refer a multi-employer plan’s (a plan sponsored by or
contributed to by two or more employers or employee organizations) statement
identifying specific members as employees of employers of fewer than 20 employees, as
a basis for making Medicare primary payer, to the MSP contractor for coordination of
benefits. Refer to the Employer Exception (SEE) provisions process on the following
link: https://www.cms.gov/Medicare/Coordination-of-Benefits-and-
Recovery/EmployerServices/Small-Employer-Exception
NOTE: The request to exempt is done on a prospective basis.