Before you start

A long-stay visa and an Alien Registration Card
A registered Daejeon address, where NHIS posts your card and bills
An employer or institute for workplace enrolment, or readiness to pay the local-subscriber premium
A Korean bank account for premium auto-debit

Step-by-step

1
Work out your subscriber category
Employees of a registered company or institute are enrolled from day one and the premium is split roughly evenly with the employer. Everyone else — students, visiting researchers on stipends, freelancers, spouses, people between contracts — is enrolled automatically as a local subscriber once residence passes six months. There is no uninsured option.
Via employerWho: Your employer's HR, your institute's admin office, or NHIS directlyAutomatic; local subscribers at six months
2
Check which category a stipend puts you in before you arrive
This catches Daejeon arrivals more than most. A post-doctoral appointment with an employment contract is workplace enrolment with a split premium; a visiting researcher or scholarship holder on a stipend is often a local subscriber paying the full benchmark premium out of that stipend. The difference is substantial and it is decided by the contract, not the job title. Ask the hosting institute which one your paperwork creates.
Via employerWho: You with your institute's administrationBefore accepting the appointment
3
Set up auto-debit as soon as the account exists
Local-subscriber bills arrive by post in Korean and are easy to overlook entirely. Arrears accumulate, and immigration checks NHIS payment status at visa extension — so an ignored envelope becomes a residence problem. Direct debit removes the risk.
OnlineWho: YouAs soon as the account exists
4
Use a neighbourhood clinic before a university hospital
The co-payment share rises with the tier of institution. Walk into a local clinic for anything ordinary — no appointment, no referral, and a co-payment usually in the ₩5,000–8,000 range. General and university hospitals charge substantially more, and the largest tertiary hospitals normally require a referral letter first.
In personWho: YouSame-day walk-in
5
Know which Daejeon hospital does what
Chungnam National University Hospital in Jung-gu is the city's main tertiary centre and carries the international patient service; Konyang University Hospital, Eulji University Hospital and Daejeon St Mary's cover the rest of the map, and Sun Medical Center is the large private option. They also take referrals from Sejong and South Chungcheong, so a first specialist slot can be further out than the city's size implies. The 1330 travel hotline provides live medical interpretation by phone anywhere in Korea.
In personWho: YouWorth identifying before you need it
6
Check whether your nationality can reclaim the pension
National Pension enrolment runs alongside health insurance for most workers. A lump-sum refund on permanent departure is available only where a social security agreement provides for it, or where your country grants Koreans the equivalent. Americans, Canadians and Germans can generally claim; British and Chinese nationals generally cannot. In a city full of three-year research contracts this decides a real amount of money — confirm with NPS on 1355 rather than assuming.
OnlineWho: YouClaimed on departure

Documents you’ll need

Alien Registration Card — your everyday healthcare ID
Passport, for registration before the ARC issues
NHIS card or certificate, posted after enrolment
Korean bank account details for auto-debit
Referral letter, for tertiary hospital treatment

Things most newcomers don’t know

A stipend and a salary put you in completely different insurance categories.

Workplace enrolment splits the premium with the employer; local-subscriber enrolment charges you a premium benchmarked to the national average with nobody contributing. Visiting researchers, scholarship students and unfunded post-docs frequently land in the second category and discover a substantial monthly bill against an already modest stipend. The determining factor is what the contract is, not what the role is called, and it is answerable before you accept.

Source: NHIS — guidance for foreigners

Unpaid health insurance premiums can cost you your visa extension.

Korean immigration checks NHIS arrears at extension, so a bill ignored because it arrived in Korean can resurface a year later as a refusal. Most countries keep health billing and immigration entirely separate, which is why this catches people. Local subscribers are most exposed because nobody is deducting the premium on their behalf. Auto-debit closes the risk completely.

Source: NHIS; Korea Immigration Service

Whether your pension contributions come back is decided by your passport, not your service.

The lump-sum refund on leaving Korea is paid where a social security agreement provides for it or where your country would treat a Korean the same way. Roughly thirty-odd nationalities qualify, including Americans, Canadians and Germans; British and Chinese nationals generally do not. In a city where three-year contracts are normal and people genuinely do leave, two colleagues with identical contributions can get opposite answers.

Source: National Pension Service

The city's hospitals serve Sejong and Chungcheong too, which lengthens specialist waits.

Daejeon is the tertiary referral centre for a much wider area than its own population, so a first appointment in a busy department can be weeks out even though the city feels uncrowded. Register with a neighbourhood clinic for routine care; the referral letter it writes is also what puts you in the lower co-payment tier at the university hospital.

Source: NHIS; Korean tiered co-payment system

Common mistakes to avoid

Assuming private or international cover exempts you from NHIS — it does not.
Accepting a stipend-based appointment without checking which insurance category it creates.
Ignoring Korean-language premium bills as a local subscriber and building arrears.
Defaulting to a university hospital for minor complaints and paying tertiary co-payments.
Leaving Korea at the end of a research contract without checking the pension refund position first.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.