How do I add my newborn to health insurance, and what is the deadline?

Health insuranceDeadlinesChecked Nov 5, 2026

From K.Actuary, founded by Sangmin Kwon, ASA · sources checked 2026-11-05 · Source: eCFR · 29 CFR 2590.701-6 · § 2590.701-6(b) (special enrollment for new dependents) View original ↗

In short

A new baby lets you add coverage outside open enrollment.
Job plan: ask within at least 30 days. Marketplace: within 60 days.
If you had Medicaid at birth, your baby is covered too.

What this means

Job-based plans: federal rules say the plan must give you at least 30 days after the birth to ask to enroll. Coverage must start on the date of birth [1]. Your plan can give more time, but not less.

Marketplace plans: HealthCare.gov says a birth gives you a Special Enrollment Period. Coverage can start on the day of the birth, even if you enroll up to 60 days later [2]. You can add the baby to your plan or put the baby in a separate plan [3]. Being pregnant does not open a Special Enrollment Period, but the birth does [3].

Medicaid: if the mother had Medicaid at the birth, the baby is treated as already eligible. The baby stays eligible until the first birthday, with a few exceptions [4]. HealthCare.gov says the baby is enrolled automatically [3].

If a claim for your baby was denied as "not covered," check the dates. If you asked within the time above, appeal and include the birth date and the date you asked to add the baby.

Your next step

Add the baby now. Job plan: tell HR or the plan in writing. Marketplace: update your application. Medicaid: tell your state agency about the birth.

Deadline: at least 30 days after the birth for job plans; up to 60 days after the birth for the Marketplace.

Check it yourself

Your job plan's Summary Plan Description says its exact deadline (it may be longer than 30 days). Your state may run its own Marketplace with other rules — "Don't know yet" for state-run Marketplaces.

Where this comes from (4)

[1] eCFR · 29 CFR 2590.701-6 · § 2590.701-6(b) (special enrollment for new dependents) · checked 2026-11-05
Request. A plan or issuer must allow an individual a period of at least 30 days after the date of the marriage, birth, adoption, or placement for adoption … Birth, adoption, or placement for adoption. Coverage must begin in the case of a dependent's birth on the date of birth
[2] HealthCare.gov · Special Enrollment Period · checked 2026-11-05
Had a baby, adopted a child, or placed a child for foster care. Your coverage can start the day of the event—even if you enroll in the plan up to 60 days afterward.
[3] HealthCare.gov · Health coverage if you're pregnant, plan to get pregnant, or recently gave birth · checked 2026-11-05
Being pregnant doesn't qualify you for a Special Enrollment Period, but the birth of a child does. … If you have Medicaid when you give birth, your newborn is automatically enrolled in Medicaid coverage and will remain eligible for at least a year. … If you already have Marketplace coverage when your baby is born, you can: Keep your current plan and add your baby to your coverage, OR Create a separate enrollment grou…
[4] eCFR · 42 CFR 435.117 · § 435.117(b)(3) · checked 2026-11-05
The child is deemed to have applied and been determined eligible under the Medicaid State plan effective as of the date of birth, and remains eligible regardless of changes in circumstances until the child's first birthday, unless the child dies or ceases to be a resident of the State or the child's representative requests a voluntary termination of eligibility.

How we found this

We matched your question to 4 official sources, quoted the exact lines, and re-checked each quote against its source on 2026-11-05.

What we don’t know yet

Your own plan or notice may say something different. If your letter cites another rule, send it and we will look again.

Every answer is checked against the official rule it quotes.

Information only — not legal advice. Your plan, insurer or agency decides.

This answer quotes the official sources listed above, with the date we checked them. Your own policy, notice and state rules control. We are not your lawyer or your insurer. We don’t file, argue or negotiate claims for you — you send any letter or form yourself.

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