I thought expat insurance was taken care of – Common expat insurance mistakes in Korea

I thought expat insurance was taken care of. That phrase comes up more than you would expect.

Most expats I meet think their employer sorted out their expat insurance, or that NHIS (National Health Insurance) covers everything. Then they get hit with a 2.8 million won hospital bill for a skiing accident, or their dental work gets rejected because NHIS doesn’t cover cosmetic procedures. I have seen both scenarios play out more times than I can count.

The reality is that expat insurance in Korea has three layers: NHIS (mandatory for residents), private supplemental insurance, and international travel insurance. Most people only have one or two of these, and they find out the gaps the hard way.

Two Expats, Two Very Different Outcomes

Sarah, 29, English teacher from Canada. She signed up for NHIS through her school in March 2024, paid her monthly premiums (around 118,000 won), and thought she was fully covered. In August 2024, she tore her ACL playing soccer. Surgery cost 4.2 million won total. NHIS covered 2.5 million won (about 60%), leaving her with 1.7 million won out of pocket. She had no supplemental insurance. She borrowed money from friends and paid it off over 11 months.

Marcus, 34, software developer from the UK. He also had NHIS but added Samsung Fire’s expat-focused private insurance for 47,000 won per month. In November 2025, he broke his wrist skateboarding. Total bill was 3.1 million won. NHIS covered 1.9 million won, his private insurance covered the remaining 1.2 million won plus gave him 300,000 won for 6 days of hospitalization. He paid zero out of pocket.

The difference? Marcus spent 564,000 won extra per year on private insurance. Sarah’s single accident cost her 1.7 million won. Do the math.

What NHIS Actually Covers (And What It Ignores)

NHIS is mandatory if you are staying in Korea for more than 6 months. You cannot opt out. The coverage is decent but has massive blind spots that catch expats off guard.

NHIS covers about 50-70% of most procedures. Inpatient surgery, basic medications, emergency room visits, standard diagnostics. But it excludes dental work beyond basic fillings, vision correction, most mental health therapy sessions, cosmetic procedures, and experimental treatments.

I covered the full breakdown here: Health Insurance Korea: What Expats Need to Know About NHIS vs Private Coverage

Honestly, the mental health gap is a headache. Therapy sessions can run 150,000-200,000 won per session, and NHIS barely touches it. I know 4 expats who stopped therapy because of costs.

Why Private Expat Insurance Exists

Private insurance fills the gaps NHIS leaves. It covers the 30-50% co-pay, adds hospitalization allowances (usually 50,000-100,000 won per day), and sometimes includes dental and vision.

Three main types exist for expats:

• Korean local insurers with expat plans (Samsung Fire, DB Insurance, Hyundai Marine)
• International providers (Cigna Global, Allianz Care)
• Travel insurance extended to cover residence (IMG, SafetyWing)

Korean local plans are cheapest, usually 35,000-60,000 won per month. International plans run 120,000-300,000 won monthly but cover you globally. Travel insurance converted to residence coverage sits in between at 70,000-150,000 won monthly.

The Coverage Comparison Expats Actually Need

Honestly the easiest way to see this is side by side:

Coverage Type	NHIS Only	NHIS + Korean Private	International Plan
Monthly Cost	100,000-130,000₩	140,000-190,000₩	220,000-400,000₩
Hospital Co-pay	30-50% you pay	0-10% you pay	0% (full coverage)
Dental Coverage	Basic fillings only	Some plans add crowns	Full coverage typical
Mental Health	Limited sessions	Rarely included	Usually 10-20 sessions/year
Coverage Outside Korea	No	No	Yes, global

My take after watching dozens of friends navigate this: if you are planning to stay in Korea for 2+ years and rarely travel, Korean private insurance makes sense. If you travel frequently or want mental health coverage, go international despite the cost.

What Happens When Claims Get Rejected

I watched my friend Jake get his claim denied 3 times before figuring out the system. He submitted a claim for a shoulder injury from weightlifting. First rejection said “pre-existing condition” even though he had never injured it before. Second rejection cited incomplete hospital records. Third rejection happened because he filed 47 days after treatment and his policy required submission within 30 days.

He eventually got paid after resubmitting with a doctor’s letter confirming no pre-existing condition and appealing through the Financial Supervisory Service. The whole process took 89 days. He got 1.4 million won back.

The rejection reasons I see most often: pre-existing conditions (real or claimed), filing deadlines missed, treatment classified as non-essential, and incorrect documentation. I wrote about this in detail here: Why Your Insurance Claim Korea Might Get Rejected (And How to Fix It)

Going Uninsured Is Not an Option in Korea

NHIS is legally mandatory for residents. If you skip enrollment, Immigration will flag you during visa renewal. I know one person who got fined 840,000 won for 7 months of unpaid premiums when renewing their E-2 visa in 2024.

Beyond the legal issue, medical costs in Korea are high without insurance. A simple ER visit for food poisoning runs 400,000-600,000 won uninsured. An MRI costs 800,000-1.2 million won. Appendix surgery can hit 5-7 million won.

Even with NHIS, the co-pay can wreck your budget. That is why I always recommend at least basic supplemental coverage if you can afford the extra 40,000-50,000 won monthly.

Questions Expats Actually Ask Me

Can I use my home country insurance in Korea?
Technically yes if it is an international plan, but most domestic plans from the US, Canada, UK, or Australia do not cover you abroad. Some let you pay upfront and reimburse later, but Korean hospitals usually want payment immediately. I tried this once with my Canadian insurance in 2019—the hospital required 3.2 million won upfront, and my reimbursement took 11 weeks to process.

Does expat insurance cover COVID treatment?
NHIS covers COVID treatment and quarantine costs as of 2026. Most private expat insurance plans also include pandemic coverage now, but check your policy. Some older policies written before 2023 still exclude pandemics.

What if I already have car insurance—does that cover medical?
Korean car insurance includes some personal injury coverage, but it is minimal and only applies to car accidents. For everything else, you still need health insurance. I explained the overlap here: Car Insurance Korea: Complete Guide to Coverage and Costs for Expats

Choosing the Right Expat Insurance for Your Situation

This part confuses a lot of people, so here is a quick table:

Your Situation	Recommended Coverage	Estimated Monthly Cost
Short-term stay (under 6 months)	Travel insurance only	50,000-90,000₩
Long-term, low budget	NHIS only (mandatory anyway)	100,000-130,000₩
Long-term, moderate budget	NHIS + Korean private plan	140,000-190,000₩
Frequent traveler or high medical needs	International insurance plan	220,000-400,000₩

I personally use NHIS plus a Korean private plan from DB Insurance. It costs me 163,000 won monthly total. I tried an international plan for 8 months in 2023 but canceled it because I was not traveling enough to justify the 340,000 won monthly cost.

Official Sources

• National Health Insurance Service (NHIS) – Official NHIS information for foreigners
• Financial Supervisory Service Korea – Insurance claim disputes and regulations
• Korea Insurance Development Institute – Insurance industry data and consumer guides

Final Tip from a Fellow Expat

Get your expat insurance sorted before you need it, not after the ER visit. I made that mistake in my first year here and paid 2.1 million won out of pocket for a broken collarbone. The paperwork is annoying and the Korean insurance agents do not always speak great English, but find someone who has done it before and ask them to walk you through it. Took me 3 hours total to set up my current coverage, and it has saved me over 4 million won across 6 years in Korea. Worth every minute.

⚠️ Disclaimer: This article is for general informational purposes only. Insurance coverage, eligibility, and costs vary by individual circumstances — visa type, employment status, and personal situation all affect what applies to you. Before making any insurance decisions, always confirm directly with your insurer, the NHIS, the Financial Supervisory Service (FSS), or a licensed insurance advisor in Korea. This site does not provide legally binding insurance advice.