Whether you are in Korea’s health insurance system, and from what date, depends on which of four routes brought you in. Three of them enrol you automatically. The fourth is the only one you have to ask for.
Most English guides give one rule — six months of residence — and stop. That rule is real, but it governs only one of the four routes, and even inside that route several visa types skip the wait completely. This page sorts out which route is yours, and what happens on the date it starts.
The four routes into the system
Verified September 2026 · National Health Insurance Act, Article 109
One article of the Act sets out every way a foreign resident can be in, or out of, national health insurance. There are four, and they are not alternatives you choose between. Your situation decides which one you are in.
| Route | Who is in it | When it starts |
|---|---|---|
| Employee insured 직장가입자 |
You work at a company, school, or public office in Korea and are on its payroll | Your first day of work. Your employer files it |
| Locally insured 지역가입자 |
Registered foreign residents who are not on a Korean payroll and not a dependent | Six months after entry, or the day you enter for some visa types |
| Dependent 피부양자 |
Close family of someone who is employee insured, within income and property limits | Six months after entry, with narrow exceptions |
| Excluded 적용제외 |
Already covered by a foreign law, a foreign insurance policy, or your employer’s contract | Only when you apply and it is approved |
The practical test between the first two is your payslip. If health insurance is deducted from it, you are employee insured and roughly half the contribution is paid by your employer. If no Korean employer deducts it, you are locally insured and the whole monthly bill comes to you.
The six-month clock, and who skips it
Verified September 2026 · Ministry of Health and Welfare Notice 2025-69, Article 4, in force 23 April 2025
This part applies to the locally insured route. The notice that governs it is written in Korean only, and it is more specific than any English summary of it.
Leaving the country during those six months is handled in detail, and the detail matters if you travel.
Several visa types do not wait at all. For these, coverage and contributions begin on the day of entry, or on the day you enrol at a designated school.
This is the point at which the six-month rule misleads people most. A student who assumes there is nothing to pay until month seven is already accruing contributions, and the bill arrives backdated.
Which visa types are charged
Verified September 2026 · NHIS, contribution basis for overseas Koreans and foreign residents
Being registered is not by itself enough. The locally insured route applies to a set list of statuses, published by NHIS.
| Group | Statuses |
|---|---|
| Overseas Korean nationals | C-0, C-9, C-10 |
| Study, training, culture, business | D-1, D-2, D-3, D-4, D-5, D-6, D-7, D-8, D-9, D-10 |
| Employment | E-1, E-2, E-3, E-4, E-5, E-6, E-7, E-9, E-10 |
| Family and residence | F-1, F-2, F-3, F-4 |
| Other | G-1-6, G-1-12, H-1, H-2 |
Two things are worth reading off this list. Households headed by someone with Permanent Residence (F-5) or Marriage Immigrant (F-6) are charged on the same basis as Korean nationals, without the fixed floor that applies to everyone else. And if your status does not appear here at all, do not assume either way — the list is set by notice and is revised. Call the NHIS English line on 033-811-2000 and ask.
Being covered under a family member
Verified September 2026 · Ministry of Health and Welfare Notice 2025-69, Article 5
If someone in your family is employee insured, you may be able to sit under their cover as a dependent and pay nothing yourself. For Korean nationals this is straightforward. For foreign residents two conditions are added, and both catch people out.
There are also income and property limits, set by the Enforcement Rule and revised from time to time. Because the figures move, check them with NHIS rather than with a guide. A separate page on dependents is in preparation.
Applying to stay out of the system
Verified September 2026 · Enforcement Rule of the National Health Insurance Act, Article 61-4
The fourth route is the only one that requires you to act. If you already have medical cover from somewhere else, you can apply to be left out. Three grounds are recognised.
| Ground | What you file with it |
|---|---|
| A foreign law covers you | A confirmation that the foreign law applies to you |
| A foreign insurance policy | The insurance contract, or another document proving you are covered |
| Your employer’s contract | The employment contract, plus proof that the employer pays your medical costs |
All three also require a written statement that you do not wish to join. The form is Annex 7 if you would otherwise be locally insured, and Annex 8 if you would be employee insured. Both go to NHIS.
How long an approved exclusion runs for is set separately by the Ministry rather than in the rule itself, so ask NHIS for the period that currently applies before you plan around it.
Getting help in English
NHIS runs an English consultation line that is separate from its main call center and from the immigration information line. These three are often confused.
For anything that needs a counter rather than a phone, NHIS operates foreigner service centers in Seoul, Ansan, Suwon, Incheon, and the Uijeongbu area, where the enrolment paperwork and the payment setup are handled in the same visit.
More on health insurance
Each guide below covers one part of the system. Open the one that matches where you are.
Frequently asked questions
Official sources
Everything above comes from the Act, the notice that implements it, and NHIS policy pages. Rules change, so open the one that matters to your case before you act on it.