How to Add a Newborn to Your Health Insurance: The 30-Day Deadline

The moment your baby is born, a clock starts in a benefits portal somewhere. You have a few weeks to add them to your health insurance, and those weeks are the blurriest of your life. Miss the window and the baby’s hospital bills can land on you, not your insurer.

Adding a newborn to your health insurance takes about ten minutes, if you do the homework before the birth. Health insurance is a maze designed by lawyers. Spend those ten minutes now so future, sleep-deprived you doesn’t have to.

How long do you have to add a baby to your health insurance?

Usually 30 days from the birth for a plan through your job, and 60 days on the Marketplace. Exactly how long depends on where your coverage comes from:

If you enroll on time, coverage on an employer plan goes back to the birth date. On the Marketplace it can start on the day of the birth too. So the delivery and those first checkups are covered, as long as you don’t miss the deadline. Pay any extra premium on time as well.

Thirty days sounds like plenty. Then you remember the hospital stay, the first pediatrician visit at three to five days old and roughly four weeks of not knowing what day it is. Put a reminder in your phone for day 7, not day 29.

How to add a newborn to Medicaid

If she’s on Medicaid when the baby is born, the baby is automatically covered for at least a year. Your job is to report the birth to your state Medicaid agency quickly so the baby gets an ID number. Automatic doesn’t mean the paperwork does itself.

Not on Medicaid? Medicaid and CHIP have no enrollment season, so you can apply for your baby any time. Whether they qualify depends on your income and your state.

How to add a newborn to TRICARE and DEERS

Register the baby in DEERS within 90 days of the birth, or 120 days overseas. Children of active-duty sponsors are then enrolled automatically. Retirees and Reserve Select families also have to enroll the baby in a plan within the same window. Miss it and TRICARE stops paying claims from day 91, or day 121 overseas.

Is having a baby a qualifying life event?

Yes. A birth is a qualifying life event for Marketplace plans and employer plans, so you don’t have to wait for open enrollment. Employer plans call it “special enrollment”.

It’s bigger than adding one small person. The birth also lets you and your spouse enroll if you weren’t on the plan yet, as long as you’re eligible for it.

Is having a baby a qualifying event for the father?

Yes. The birth counts for both parents, married or not, so the baby can go on your plan, hers or both. Which one is the better choice is a few sections down.

Is a newborn covered under the mother’s insurance for the first 30 days?

Sometimes, but only for a short time, and only if you then actually enroll the baby. This is the trap that catches the most parents.

Many states require insurance plans to cover a newborn automatically for the first month or so. Maine, for example, requires 31 days from birth. After that, the coverage simply ends unless you’ve reported the birth and paid any extra premium.

And many large employers run “self-funded” plans that don’t have to follow state insurance rules at all. Your HR team knows which kind you have. Ask, then enroll the baby anyway. “But the baby was covered last week” won’t help you much on day 31.

Can you add a baby to health insurance before birth?

No. You can’t enroll someone who hasn’t been born yet. You can do everything else, though, and that’s what makes the real job take ten minutes:

• Ask HR or your insurer how to add a dependent: portal, form or phone call.
• Ask for the exact deadline, and whether it counts from the birth or from something else.
• Ask which documents they need and when.
• Check that your hospital and your pediatrician are in-network.
• Decide whose plan the baby goes on.

Our free paternity leave HR questions list includes the insurance questions, with room to write down the answers. Bring it to the same HR conversation where you sort out your leave.

What do you need to add a newborn to your insurance?

Your baby’s full name, date of birth and, usually, proof of the birth. Most plans also ask for a Social Security number, but not on day one. Have this ready:

• The baby’s legal name. Agree on it before the delivery room if you can. Arguing about middle names during enrollment is not a great look.
• Proof of birth. Ask your plan which document counts, and whether a hospital record will do while you wait for the birth certificate.
• Your plan’s details. Member ID, group number and the HR or insurer contact.
• A confirmation. Save the confirmation number and check, a week later, that the baby actually shows up on the plan.

Can you add a baby to insurance without a Social Security number?

Usually, yes. Most plans let you enroll the baby first and send the number later, because no newborn has one in the first few weeks. Ask your plan how to handle it, and never let a missing number push you past the deadline.

The fastest way to get the number is to apply at the hospital, on the same form as the birth certificate. The card usually arrives in about two to four weeks, depending on your state.

Which parent’s insurance should the baby go on?

The plan that costs your family less overall, not the one with the cheapest monthly premium. If you both have coverage through work, compare them before the birth:

• The extra premium for adding a child or the family tier.
• The family deductible and out-of-pocket maximum.
• Copays for sick visits and the ER. There will be sick visits, and there might be an ER.
• Whether your pediatrician is in-network.

Routine checkups are less of a deciding factor than you’d think. There are seven well-child visits in the first year, and most plans cover them with no cost to you in-network. It’s the sick visits and surprises that cost money. Our guide to what it costs to have a baby explains deductibles and out-of-pocket maximums without the jargon.

What is the birthday rule for newborn insurance?

If the baby is on both parents’ plans, the birthday rule decides which plan pays first. It’s the plan of the parent whose birthday comes earlier in the calendar year, month and day only. Your age has nothing to do with it. Born in March, she’s in June? Your plan pays first. The second plan only picks up part of what’s left, so two plans rarely means double the coverage.

Should you switch health plans when your baby is born?

Maybe. On an employer plan, the birth lets you choose any plan option your employer offers, not just add the baby to the one you have. If a lower deductible suddenly looks attractive, this is your chance. Ask what happens to the deductible you’ve already paid this year before you switch.

On the Marketplace, you can add the baby to your current plan or put them on a separate one.

What happens if you forget to add your newborn to insurance?

Call HR or your insurer the same day you realize it. Some plans give you more than 30 days, and a few have a late-enrollment procedure, but none of them have to. If the window has closed, the baby may have to wait for the next open enrollment, and any bills in between are yours.

You may still have two other options:

• The Marketplace. Its window is 60 days, so if you’re past your work plan’s deadline but within 60 days of the birth, you can buy a Marketplace plan for the baby. If your job offers affordable coverage, you probably won’t get a discount on it.
• Medicaid or CHIP. You can apply any time of year. It depends on your income and your state.

The easiest fix is not to need any of this. Day 7 reminder. Phone. Now.

How to add a newborn to your health insurance, step by step

This is general information, not legal, financial or insurance advice. Deadlines and rules depend on your plan, your employer and your state. Check the details with HR or your insurer.

Sources: US Department of Labor: adding a newborn, 29 CFR 2590.701-6, HealthCare.gov: special enrollment, HealthCare.gov: pregnancy and your baby, InsureKidsNow.gov, TRICARE: getting coverage for your child, Social Security Administration, Connecticut Office of the Healthcare Advocate: coordination of benefits, Maine Bureau of Insurance, AAP HealthyChildren.org, HHS: preventive care.