Quick answer for tired parents

Employer plan: you have at least 30 days from the birth to request enrollment, and coverage then starts on the birth date. Marketplace plan: 60 days, generally retroactive to the birth date. Medicaid: if mom had Medicaid on the birth date, the baby is generally covered until age one without a new application — but report the birth now. Don’t wait for the birth certificate or Social Security number to tell your plan.

Get your exact last day and coverage start date →

One family’s NICU stay produced a $207,455 hospital charge and more than a year of insurance back-and-forth, all tied to a coverage rule most parents have never heard of (KFF Health News). Here’s how to avoid that.

Rules verified October 22, 2026 against federal regulations.

Newborn Coverage Deadline Checker

Enter your baby’s birth date to see your last day to act and when coverage should start. Nothing you enter is saved or sent anywhere.

Baby’s date of birth

Coverage you’ll use for the baby A parent’s employer plan Marketplace / HealthCare.gov or state exchange Medicaid or CHIP (mom was covered on the birth date) No coverage right now Not sure

Do both parents have employer coverage? No Yes Not sure

Your result will appear here after you press the button.

The Three Mistakes That Cost Families Money

Most expensive newborn-coverage problems start with one of three avoidable mistakes.

1. Waiting for the Social Security number. The window can close before the card arrives. Tell your plan now, in writing. See documents.

2. Assuming the baby is covered automatically. Some plans do cover a newborn briefly; many don’t, and self-funded plans follow their own documents. See why.

3. Telling only one plan. If both parents have coverage, both plans need to know. See the birthday rule.

Your Deadline, by Type of Coverage

Employer plans give you at least 30 days from the birth, Marketplace plans give you 60 days, and Medicaid deemed-newborn coverage needs no application at all.

FEDERAL RULEDEPENDS ON YOUR PLAN

Those windows are what let coverage reach back to the birth date. Act inside the window and the baby’s first days, including newborn nursery care, are generally covered from day one. Act after it and that backdating may no longer be available.

Employer plans (HIPAA special enrollment)

A group health plan has to give you at least 30 days after the birth to request enrollment. If you do, coverage has to be effective as of the date of birth, with no preexisting-condition exclusion (DOL).

Special enrollees can generally choose any benefit package the employer offers. If you’re weighing tiers, see HMO vs PPO. A plan may allow more than 30 days, so read your SPD.

Marketplace plans (HealthCare.gov and state exchanges)

You have 60 days from the birth. You can add the baby to your current plan or buy a separate policy for the child, and coverage can start on the birth date (HealthCare.gov).

This special enrollment period generally doesn’t let you switch plans for family members who are already covered. Exceptions apply, for example if your current plan doesn’t cover dependents. State-run exchanges may be more flexible.

Proof rules change, so check before you enroll. In the sources checked in October 2026, HealthCare.gov required proof before enrollment only for loss of coverage, not births, but you may still be asked for a birth record, and state exchanges can differ.

Why “retroactive to birth” depends on acting in time

Backdated coverage is the reward for acting inside the window. Past it, your employer plan generally waits for open enrollment, and a Marketplace plan generally does too. See what to do if you missed it.

One more thing the birth opens: mid-year FSA changes

A birth is a change-in-status event under IRS cafeteria-plan rules (26 CFR 1.125-4), so your employer may let you change a health FSA or dependent-care FSA election mid-year. Whether it does, and for how long, is set by your plan document, and the window is often short. Ask HR the same week. For the basics, see HSA vs FSA and Dependent Care FSA vs Child Care Credit.

Is My Baby Already Covered Under My Plan?

Not necessarily, so never assume it.

DEPENDS ON YOUR STATEDEPENDS ON YOUR PLAN

You may have heard a newborn is covered under the mother’s plan for the first 30 days. For some plans that’s roughly right. For others it isn’t. The number comes from state law and plan documents, not from one federal rule.

Many states require state-regulated (fully insured) plans to cover a newborn from birth for a set period, often 31 days, and to accept enrollment within it. Texas, for example, ends small-employer newborn coverage on the 32nd day unless the plan gets notice of the birth and any required premium by day 31 (Tex. Ins. Code 1501.157). Your state may differ.

Those state mandates generally don’t reach self-funded employer plans, which follow federal law and their own plan document. In the KFF Health News case below, the state insurance department declined to help for exactly that reason.

The federal rule gives you a window to request enrollment. It is not a promise of automatic coverage.

How to tell whether your plan is self-funded

Ask HR: “Is our medical plan fully insured or self-funded?” The summary plan description (SPD) usually says too. Either way, request enrollment inside the window.

A related protection: the length of the hospital stay

Plans that cover childbirth generally can’t limit the hospital stay benefit to less than 48 hours after a vaginal delivery or 96 hours after a cesarean (DOL). That is a rule about hospital-stay benefits, not an enrollment rule, so you still need to tell your plan about the birth.

Why Your Baby Gets a Separate Bill

Once born, your baby is their own patient, so their care is billed and processed as separate claims from yours.

DEPENDS ON YOUR PLAN

Newborn nursery care, newborn screening, the pediatrician’s hospital visit, and any NICU time typically show up under the baby’s name, not the mother’s. Expect separate hospital bills, separate doctor bills, and separate EOBs.

Whether the baby also gets a separate deductible depends on your plan. Two things decide it: how the family deductible is built, and whether you move from self-only to family coverage.

Type	How it works	What it means for baby’s bills
Embedded family deductible	Each person has an individual deductible inside a family limit. Once one person meets theirs, the plan starts paying for that person.	The baby may have their own deductible, and a big early claim could meet it even if no one else has met theirs.
Aggregate (non-embedded) family deductible	One shared family deductible is met by everyone’s combined claims before the plan pays.	The baby’s bills may count toward the shared family deductible rather than a separate one.
Moving from self-only to a family tier	Adding a dependent usually changes your coverage tier and its deductible and out-of-pocket limits.	Ask whether what you’ve already paid this year carries over to the family tier.

Two questions to ask your plan: “Is our family deductible embedded or aggregate?” and “If I move from self-only to family coverage, does my deductible progress carry over?” For the mechanics of deductibles and out-of-pocket limits, see How Health Insurance Works.

Both Parents Insured: The Birthday Rule

When both parents have coverage and live together, the plan of the parent whose birthday comes first in the calendar year is usually the primary plan.

DEPENDS ON YOUR STATEDEPENDS ON YOUR PLAN

This is a model rule from the National Association of Insurance Commissioners, adopted by most states (NAIC Model 120). It is not a federal law. Self-insured employer plans aren’t bound by state coordination-of-benefits rules, though many follow the NAIC model.

Parent A birthday	Parent B birthday	Living together?	Primary plan	Why
March 9	August 22	Yes	Parent A’s plan	March comes before August.
November 30 (born 1980)	February 2 (born 1995)	Yes	Parent B’s plan	February comes before November. Birth year is ignored.
June 15	June 15	Yes	The plan that has covered its parent longer	Same-birthday tie-break.
Any	Any	No; a court decree makes Parent A responsible for coverage	Parent A’s plan, once it knows about the decree	A court decree comes first. Send the decree to the plans.
Any	Any	No; joint custody, or a decree that assigns no one	Birthday rule applies	Per the NAIC model.
Any	Any	No; no decree at all	Generally the custodial parent’s plan first	Custodial-parent order under the NAIC model. Confirm with both plans.

What happened to one family

KFF Health News followed a first-time-parent case. Both parents had job-based coverage. They put the baby on the mother’s plan, but the insurer found the father’s coverage, and under the birthday rule his plan became primary. It had a $12,000 deductible and a network centered in another state.

The baby’s NICU stay carried a $207,455 charge. The state insurance department declined to help because the mother’s plan was self-funded. It took more than a year, and an HR officer’s help, to reach a zero balance.

KFF’s advice: contact the plan before the baby is born, and consider moving the whole family onto one plan. Read the full story at KFF Health News.

Should we put the baby on both plans?

Often you can. The birthday rule still sets which plan pays first. Some families instead move everyone onto one plan at the birth. Compare premiums, deductibles, and networks, and ask both HR teams.

Mom on Medicaid: Deemed Newborn Coverage

If mom was eligible for and received Medicaid on the day of the birth, the baby is generally covered from birth until the first birthday without an application.

FEDERAL RULEDEPENDS ON YOUR STATE

That’s the federal deemed-newborn rule (42 CFR 435.117). It includes mothers whose Medicaid was emergency-only, and mothers covered by Medicaid in another state.

Eligibility generally continues until age one regardless of changes in circumstances, with limited exceptions. The state must issue the baby a separate Medicaid ID.

Babies born to mothers covered by CHIP as pregnant women may also be deemed eligible, depending on the mother’s coverage and income (CMS guidance). Ask your state agency.

The practical gap: report it anyway

“No application” doesn’t mean “no paperwork.” The state generally has to learn about the birth before the baby’s own case is opened, and claims may be held until then. Report the birth right away and ask for the baby’s Medicaid ID.

How to report a birth

Contact your state Medicaid agency by phone or its online portal, or ask the hospital’s financial counselor. Have the baby’s name and date of birth and mom’s Medicaid ID ready. If mom wasn’t on Medicaid, you can still apply for Medicaid or CHIP any time of year, and income rules apply.

No Insurance When the Baby Was Born

A birth opens a 60-day Marketplace special enrollment period, and Medicaid and CHIP accept applications year-round.

FEDERAL RULEDEPENDS ON YOUR STATE

Apply to the Marketplace within 60 days of the birth, and coverage can start on the birth date. Tax credits may lower your premium, depending on income.

If your family’s income may qualify, apply for Medicaid or CHIP at the same time. You don’t have to wait for a deadline.

Recently lost job-based coverage? A baby born while you’re on COBRA may be addable to it; ask the plan administrator right away. See COBRA Insurance, and for your own options, Health Insurance Without a Job.

If your baby needs care, get it. Sort out coverage in parallel.

What If You Missed the Window?

You still have options, and which one fits depends on the type of coverage.

DEPENDS ON YOUR PLANDEPENDS ON YOUR STATE

If your baby needs care, get it now. Coverage can be sorted out alongside.

• Medicaid or CHIP: apply now. Applications are accepted year-round, and some states can cover bills from before the application date. Ask.
• Marketplace: past 60 days, you generally wait for open enrollment. Open enrollment for 2027 plans is close, but dates vary, so confirm yours on HealthCare.gov or your state exchange.
• Employer plan: ask the plan administrator, in writing, whether the plan allows a later request (check your SPD). Otherwise the next open enrollment or another qualifying event is usually the route.

Escalating if the plan refuses

Put your request and the plan’s answer in writing. Use the plan’s appeal process (Health Insurance Appeal). For a state-regulated plan, you can contact your state insurance department. For an employer plan, the U.S. Department of Labor’s EBSA helps with benefits questions at 1-866-444-3272.

Keep copies of everything. Remember that a state insurance department may decline to help with a self-funded plan, as in the KFF case above.

Documents and the SSN Question

Tell your plan about the birth now, in writing, and send the documents when you have them.

DEPENDS ON YOUR PLAN

Plans typically ask for the birth certificate or a hospital birth record, the baby’s Social Security number once issued, and your member ID. Birth certificates and SSNs can take weeks, and your window may close first.

So notify the plan in writing inside the window even if those documents aren’t ready, and keep proof of when you sent it. Ask what the plan accepts in the meantime and when the rest is due. Don’t assume any specific plan will accept a blank SSN.

You can request the SSN during birth registration at the hospital, birthing center, or with a licensed midwife (SSA’s Enumeration at Birth). Processing averages about two weeks, plus up to two more for the card to arrive.

Big Bills After Birth

Match every bill to an EOB, and don’t pay a large balance until you know which plan paid first.

DEPENDS ON YOUR PLAN

• Look for separate claims under the baby’s name and match each to an EOB.
• Confirm which plan is primary if both parents have coverage.
• Check for out-of-network clinicians at an in-network hospital, such as anesthesiology or neonatology. The No Surprises Act may apply.
• For a large NICU balance, ask about financial assistance (Hospital Charity Care).
• If a claim is denied, appeal in writing (Health Insurance Appeal).

Billing mistakes happen. In the KFF case, the hospital later called its daily collection calls an administrative error. Ask the billing office to pause collections while insurance is sorted out.

The First-Week Checklist

Eight steps in the first week keep the deadline from sneaking up on you.

Common mistakes, side by side

Mistake	What can happen	Do this instead
Waiting for the SSN	The window closes before the number arrives.	Notify the plan in writing now and send documents later.
Assuming automatic coverage	Claims may be denied if the baby was never enrolled.	Request enrollment inside the window.
Telling only one plan	Claims can be delayed or reversed while a plan investigates other coverage.	Tell both plans and ask which is primary.
Not reporting to Medicaid	The baby’s case may not be opened and claims may be held.	Report the birth today and ask for the baby’s Medicaid ID.
Ignoring separate EOBs	Billing errors and denials go unnoticed.	Match each bill to an EOB and appeal errors.

Copyable checklist

1. Day 1 to 3: call HR or the insurer and say: “I’m requesting special enrollment for my newborn, born [date].” Ask for written confirmation.
2. Send it in writing too (portal message or email) and save a screenshot with the date.
3. Ask: How many days do I have under this plan? What documents do you need, and can I send them later? Will adding my baby move me to a different coverage tier? Does my plan have an embedded deductible?
4. Both parents insured? Tell both plans about the other coverage.
5. Mom on Medicaid? Report the birth to the state Medicaid agency and ask for the baby’s Medicaid ID.
6. Apply for the SSN at the hospital with the birth registration, if offered.
7. Check the hospital bills: look for separate claims under the baby’s name and match each to an EOB.
8. Update the rest: FSA and dependent-care FSA elections, beneficiaries, and the new-baby tax items.

Frequently Asked Questions

How long do I have to add my newborn to my insurance?

For an employer plan, at least 30 days from the birth, and your plan may allow longer. For a Marketplace plan, 60 days. For a Medicaid deemed newborn, no application is needed. Use the checker for your date.

Is my newborn automatically covered under my plan?

Not always. Some state-regulated plans must cover a newborn briefly after birth, but those rules generally don’t reach self-funded plans. Even where they apply, you still need to enroll. Don’t assume.

Does coverage start on the birth date?

For an employer plan, federal rules require coverage effective as of the birth date if you request enrollment in time. For the Marketplace, coverage is generally retroactive to the birth date, and you owe premiums for that period.

What if I add my baby on day 35?

For an employer plan, the federal 30-day minimum has passed, so ask whether your plan allows more time. For the Marketplace, day 35 is still inside the 60-day window. See what to do if you missed it.

Can I add my baby without a Social Security number?

Notify your plan in writing inside the window and ask whether you can send the number later. Plans differ, so don’t assume. You can request an SSN at the hospital during birth registration.

Can I add my baby without a birth certificate?

Same approach: notify the plan in writing inside the window, then ask what it accepts in the meantime and when the certificate is due.

Why did I get a separate hospital bill for my baby?

The baby is a separate patient. Nursery care, screening, pediatric visits, and any NICU time are typically billed as their own claims.

Does my newborn have their own deductible?

It may, depending on whether your plan uses an embedded or aggregate family deductible and whether you moved to a family tier. Ask your plan.

Should we put our baby on both parents’ plans?

Often possible. The birthday rule decides which plan pays first, and you should tell both plans. Compare premiums, deductibles, and networks before deciding.

What is the birthday rule?

When both parents have coverage and live together, the plan of the parent whose birthday (month and day only) comes first in the year is usually primary.

Does the birthday rule apply to self-funded plans?

Self-funded plans aren’t bound by state coordination-of-benefits rules, though many follow the NAIC model. Check your SPD.

What if both parents have the same birthday?

The plan that has covered its parent longer is generally primary.

Does Medicaid automatically cover my newborn?

If mom was eligible for and received Medicaid on the birth date, the baby is generally covered until age one without an application. Report the birth right away.

Do I need to apply for Medicaid for my baby?

Not for a deemed newborn, but you should report the birth and ask for the baby’s Medicaid ID. If mom wasn’t on Medicaid, you can apply any time of year.

Can I change my whole family’s Marketplace plan when my baby is born?

Generally no. You can add the baby to your current plan or enroll the baby in a separate plan. Exceptions apply, and state exchanges may differ.

Can I change my FSA after having a baby?

A birth is generally a change-in-status event, so your plan may allow it. Ask HR quickly. See HSA vs FSA.

What if I missed the deadline?

Medicaid and CHIP accept applications year-round. The Marketplace and most employer plans generally mean waiting for open enrollment unless the plan allows more time. See the full section.

Who do I complain to if my employer plan refuses?

Start with the plan administrator, in writing, and use the plan’s appeal process. Then try DOL EBSA at 1-866-444-3272. For a state-regulated plan, contact your state insurance department.

Last updated: October 22, 2026

General information, not insurance, legal, or medical advice. Federal rules set minimums; your plan documents and state law may give more time or different rules. Confirm with your plan administrator or insurer. Rules verified on October 22, 2026.