MMC Benefits Handbook
Eligible Spouses and Domestic Partners
Your legally married spouse is eligible to apply for coverage, to the extent permissible by state insurance regulations.
Your approved same gender or opposite gender Domestic Partner, to the extent permissible by state insurance regulations is also eligible to apply for coverage.
To obtain spousal or Domestic Partner coverage, you will need to agree to the Affidavit of Eligible Family Membership declaring that:
Spouse / Domestic Partner
  • You have already received a marriage license from a US state or local authority, or registered your domestic partnership with a US state or local authority.
Spouse Only
  • Although not registered with a US state or local authority, your relationship constitutes a marriage under US state or local law (e.g. common law marriage or a marriage outside the US that is honored under US state or local law).
Domestic Partner Only
  • Although not registered with a US state or local authority, your relationship constitutes an eligible domestic partnership. To establish that your relationship constitutes an eligible domestic partnership you and your domestic partner must:
    • be at least 18 years old
    • not be legally married, under federal law, to each other or anyone else or part of another domestic partnership during the previous 12 months
    • currently be in an exclusive, committed relationship with each other that has existed for at least 12 months and is intended to be permanent
    • currently reside together, and have resided together for at least the previous 12 months, and intend to do so permanently
    • have agreed to share responsibility for each other's common welfare and basic financial obligations
    • not be related by blood to a degree of closeness that would prohibit marriage under applicable state law.
  • Marsh & McLennan Companies reserves the right to require documentary proof of your domestic partnership or marriage at any time, for the purpose of determining benefits eligibility. If requested, you must provide documents verifying the registration of your domestic partnership with a state or local authority, your cohabitation and/or mutual commitment, or a marriage license that has been approved by a state or local government authority.
For New York Residents Only: Once your Affidavit of Eligible Family Membership is completed and processed, you may cover the adult child(ren), between the ages of 18 and 79, of your spouse or domestic partner.
Go to Colleague Connect (https://colleagueconnect.mmc.com), click Career & Rewards and select Mercer Marketplace Benefits Enrollment Website under Tools.