How to Enroll a Grandchild on Your Health Insurance

Health insurance is one of the most urgent questions a grandparent faces when a grandchild comes to live with them. A child needs regular checkups, vaccinations, dental cleanings, vision screenings, and quick access to a doctor when a fever strikes at 2 a.m. Without coverage, a single emergency room visit for a routine illness can cost $1,500 or more. Most grandparent caregivers have one of three insurance situations: still working with an employer plan, retired and on Medicare, or covered by a spouse's plan. Each path has different rules for adding a grandchild, and each has good options that fit on a fixed income.

Many people assume that Medicare covers a grandchild. It does not. Medicare is health insurance for people aged 65 and older, and for some younger people with disabilities. Children are not eligible for Medicare. But the grandchild in your care is eligible for one of several other programs that work well alongside Medicare. The most common options are Medicaid for children in low-income kinship families, CHIP for slightly higher-income kinship families, an employer-sponsored plan if you or your spouse still works, a marketplace plan with subsidies, or in some cases a special enrollment in your own ACA marketplace plan.

The single most important fact for grandparents is this: in nearly every state, a grandchild in your care qualifies for free or very low-cost children's health insurance through Medicaid or CHIP, regardless of your own income. Both programs look at the child's resources, not the grandparent's, when the child is in kinship care. As of 2026, more than 7 million U.S. children are enrolled in CHIP and 38 million in Medicaid, and a growing share of those are children living with grandparents. Coverage is usually retroactive for up to three months from the date of application, so if the grandchild had any medical visits before you applied, those bills can still be paid by the program.

Before you begin, collect the child's Social Security card, birth certificate, immunization record, and your own ID. Have the name and date of birth of any previous insurance carrier that covered the child, even if the policy ended. Have a current pediatrician's name if there is one. Plan for about two hours to fill out an online application or about ninety minutes for a phone application. Coverage often starts the same month you apply, and a temporary insurance card will arrive by mail within ten business days. Many states also send a digital insurance card to a phone app called myMedicaid, which lets you show the card at the doctor's office.