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One pack a day for 30 years. That’s the smoking history you need today to qualify for free lung screening in Korea.
Smoked half a pack a day for 40 years? You’re out.
So is a 50-year-old smoker.
Korea’s government wants to loosen these rules. But nothing is final yet.
Here’s what’s changing and when, as of September 2026.
Korea lung cancer screening currently covers people aged 54 to 74 with at least 30 pack-years of smoking. They get a low-dose chest CT every two years.
Officials are discussing age 50+ and 20+ pack-years. The earliest start is 2028, and the final plan isn’t confirmed.
What’s Changing in Korea Lung Cancer Screening Eligibility?
The plan is to lower the starting age to 50 and the smoking threshold to 20 pack-years. Until it takes effect, today’s rules still apply.
Korea’s national lung cancer screening is a government program that offers high-risk people a low-dose chest CT every two years.
On February 24, 2026, the Ministry of Health and Welfare held its National Cancer Control Committee meeting. It approved the 5th Cancer Control Plan (2026–2030), which includes this expansion.
A revision panel reportedly agreed on “age 50+, 20+ pack-years.” Experts disagreed on raising the upper age limit to 80.
Public hearings come first, then a final draft in the first half of 2027. Rollout could begin as early as 2028.
| Item | Korea today | Korea (proposed) | U.S. (2021) |
|---|---|---|---|
| Age | 54–74 | 50+ (upper limit under discussion) | 50–80 |
| Smoking history | 30+ pack-years | 20+ pack-years | 20+ pack-years |
| Interval | Every 2 years | Check the final plan | Every year |
Source: Korea Policy Briefing (Ministry of Health and Welfare announcement), February 2026 / National Cancer Center Korea / U.S. Preventive Services Task Force (USPSTF), 2021
The expansion is still at the planning stage.
Until it starts, the current rules (ages 54–74, 30 pack-years) apply.
How Do You Calculate Pack-Years?
Multiply packs smoked per day by the number of years you smoked. One pack equals 20 cigarettes.
A pack-year is the average number of packs smoked per day multiplied by the number of years of smoking.
Smoke one pack a day for 30 years, and you have 30 pack-years. Two packs a day for 15 years gives the same result.
Your pack-years are the first thing that decides your Korea lung cancer screening eligibility.
Did your habit change over time? Calculate each period separately and add them up.
One pack a day for 10 years plus half a pack for 20 years is 10 + 10 = 20 pack-years.
| Daily amount | Years smoked | Pack-years |
|---|---|---|
| Half a pack (10 cigarettes) | 40 | 20 |
| 1 pack (20 cigarettes) | 25 | 25 |
| 1 pack (20 cigarettes) | 30 | 30 |
| 2 packs (40 cigarettes) | 15 | 30 |
✅ Did you divide cigarettes per day by 20 to get packs?
✅ Did you count only the years you actually smoked?
✅ Did you split periods where your habit changed?
The screening center will double-check your history at intake. If you’re unsure, share your best estimate with the doctor.
How Do You Get a Low-Dose CT Lung Scan in Korea, and What Does It Cost?
You book at a designated screening site. The patient usually pays about 10% of the fee. Your insurance type can change this, so check with the National Health Insurance Service (NHIS, Korea’s public health insurer).
A low-dose chest CT is a CT scan that images the lungs with a reduced radiation dose.
You can find designated sites on the NHIS website or mobile app. Lung screening is mostly done at general hospitals or larger. Some voices are calling for clinics to join in.
- Check your eligibility on the NHIS website or app.
- Pick a designated screening site and book.
- Answer smoking-history questions, then get the low-dose chest CT.
- Receive a results consultation and smoking-cessation counseling.
- If anything looks unusual, discuss follow-up tests with your doctor.
Source: The Seoul Shinmun, “Smokers with 30+ pack-years pay only 10% for lung screening” (Korean), 2025
Have a cough that won’t go away, or blood in your sputum? Don’t wait for a screening slot.
See a doctor right away.
Looking for other tests? Browse our Exams & Procedures Guide.
What Are the Benefits and Limits of Lung Cancer Screening?
For high-risk people, screening may help lower the risk of dying from lung cancer. But it has limits, such as false alarms, so talk it over with a doctor.
The U.S. National Lung Screening Trial enrolled 53,454 people aged 55 to 74 with 30+ pack-years. The low-dose CT group had 20% fewer lung cancer deaths than the chest X-ray group.
In 2021, the U.S. widened its rules to ages 50–80 and 20+ pack-years.
There are trade-offs, too.
Some nodules found on CT turn out not to be cancer. That can mean extra tests and stress.
In Korea, critics say the expansion needs stronger evidence, and they’re watching how Korea lung cancer screening rules evolve.
Screening is not a substitute for quitting.
If you smoke, pairing screening with cessation counseling may help.
Source: New England Journal of Medicine, NLST results, 2011 / USPSTF, 2021 / Korea Biomedical Review
Frequently Asked Questions
1. I’m a 50-year-old smoker. Can I get screened now?
Not under the national program. It currently starts at age 54, and the proposed change isn’t final. Ask your doctor about private screening if you’re worried.
2. Does quitting smoking affect eligibility?
The current rule is 30+ pack-years. Check the details on quit time with the NHIS. One proposal would include former smokers above 30 pack-years regardless of when they quit.
3. Would non-smokers be included in the expansion?
The discussions so far center on smoking history. How to handle non-smoking women and other gaps isn’t settled. If you have concerns, talk with a doctor.
4. Should I wait for screening if I have symptoms?
No. Screening is for people without symptoms. A lasting cough, coughing up blood, or unexplained weight loss means you should see a doctor now.
References
Korea Policy Briefing (Ministry of Health and Welfare), “Colonoscopy from age 45 planned… national lung screening eligibility to expand” (대장암 45세부터 내시경 검진 추진…폐암 국가검진 대상도 확대), 2026. Link
National Cancer Center Korea, “National Cancer Screening Program” (국가암검진사업). Link
Korea Biomedical Review, “Government moves to expand national lung cancer screening, but demands stronger evidence”. Link
USPSTF, “Lung Cancer: Screening”, 2021. Link
New England Journal of Medicine, “Reduced Lung-Cancer Mortality with Low-Dose Computed Tomographic Screening”, 2011. Link
The Seoul Shinmun, “Smokers with 30+ pack-years pay only 10% for lung screening” (매일 한 갑씩 30년 이상 흡연자, 폐암 검진비 10%만 부담하세요), 2025. Link
This article is for general informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Please consult a qualified healthcare provider if you have health concerns.
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