It's up to you to understand who you can cover under your medical and prescription drug, dental, vision, and other benefits. Be sure to review the information below before you enroll in coverage. Eligible dependents include: A person to whom you're legally married A common-law spouse from a state that recognizes common-law marriages Your same-sex or opposite-sex domestic partner, defined as: 2 adults who are not married or related by blood, who have lived together continuously for at least 1 year & plan to do so indefinitely, are mutually responsible for their common welfare, reside at the same address, and maintain no other domestic partner relationships or marriage Your natural children, stepchildren, adopted children, disabled children, children placed in your home for adoption, and children for whom you are the legal guardian and who are under age 26 or were deemed disabled prior to age 26