Adding Dependents to Health Insurance: Who Qualifies?

Eligible Dependents for Employer‑Sponsored Health Plans

Eligibility is based on relationship, not marital status. Common categories:

• Children: Biological, adopted, step, foster (typically to age 26).
• Spouse or domestic partner (per plan/state definition).
• Parents/stepparents: Some plans allow if financially dependent.
• Siblings, nieces/nephews: Rare; usually only if legal guardianship.

Documentation Required

• Marriage certificate / domestic partnership affidavit.
• Birth/adoption certificates for children.
• Proof of residency and financial dependence (for parents/others).

Check your Summary Plan Description (SPD) and HR for exact rules; domestic partner recognition varies by state and employer.