Why Americans Are Booking a Coronary Calcium Scan in Korea

A customer wrote to us in July to correct her own inquiry form. She had ticked "body." Then she followed up: "When I said body, I actually meant heart health."

She had just run more than 100 biomarkers through a lab at home and had a DEXA scan done. Those results, plus her family history, were why she was coming to Seoul. She did not want a checkup package. She wanted four specific things — an echocardiogram, a coronary calcium scan, a CT angiogram, and a carotid ultrasound — and she wanted the echo first. 

The longevity conversation moved to the artery wall

People who track their own health have gotten very good at measuring blood. Panels, ratios, inflammation markers, ApoB. At some point that runs out of road, because every one of those numbers describes risk — the probability that something is accumulating.

A coronary calcium scan answers a different question. It looks at the artery and reports what is already in the wall. Cholesterol tells you what might be happening. Calcium tells you what has happened. The 2026 ACC/AHA dyslipidemia guideline treats the result the same way — as something that changes the plan, not just the picture: "Having any amount of coronary artery calcium supports an LDL-C goal of less than 100 mg/dL — with lower LDL-C target levels with higher amounts of calcium."

Philips Incisive CT scanner in an exam room at Bumin Prestige Lifecare Center in Seoul.

Who the guideline says should get one

It is not a general wellness test. The guideline recommends it "for men age 40 and older and women age 45 and older with borderline or intermediate 10-year risk of heart attack or stroke if knowing CAC will help with the decision to prescribe a statin or not."

Read the last clause again. This test is for people on the fence about treatment. If you are already high risk and already on a statin, the scan will not change what you do tomorrow.

Why they do it here — and it isn't the price

The scan is inexpensive in Korea. That is not why people put it on the list.

The obstacle at home is rarely the sticker — it is the process in front of it. A physician has to order the study, and coverage varies by plan and by state. A nurse wrote to us this month about imaging her U.S. doctor had recommended that her insurer would only replace with a different test; in the same thread she asked us to add a calcium scan for herself and her husband. Another traveler asked simply for "a standalone Coronary Calcium."

Korea does not remove the doctor. A physician at the clinic reviews your history and orders the scan, and an English-speaking doctor or radiologist consults with you before the exam. What disappears is the layer in front of that: no referral to obtain first, no insurer to persuade, no appeal to file if a reviewer decides your risk profile does not qualify. The clinical judgment happens the same morning instead of months earlier in an approval queue. But the price is still under $ 150. 

What it cannot tell you

A score of zero is reassuring, not exonerating. The scan sees calcified plaque only — soft, non-calcified plaque does not show up, and that is the kind more likely to rupture in younger adults. A 40-year-old smoker with a zero score still has a smoker's arteries. There is also a small dose of radiation, and a high score often leads to follow-up testing you did not plan for.

What people book alongside it

Most of our customers still book a comprehensive package and add the calcium scan to it. What has changed is how often the scan gets named on its own — and what travels with it when it does.

• CT angiogram (CCTA). Contrast shows narrowing, and the soft plaque a calcium scan misses. More information, more radiation, an IV.
• Echocardiogram (TTE). The heart in motion — pumping function and valves, not arteries.
• Carotid ultrasound. The neck arteries. No radiation, no contrast, and often where the earliest change appears.
• Chest CT, low dose. Lungs, not heart. Usually a smoking history.
• Abdominal ultrasound. Liver, kidneys, gallbladder — most often for fatty liver.
• HbA1c and a lipid panel. The blood context the calcium score is meant to reframe.

A calcium scan and a CT angiogram are not interchangeable, and ordering both when one would answer your question is how a short list becomes an expensive one. That is a conversation for the physician who orders it.

If you are still deciding, we can work backward from your family history and which checkup fits — or show you what other customers added this year. Your health, your journey.

Take control of your health. Build your checkup in minutes. We'll handle the clinic, the booking and the logistics. Build my checkup

About the Author

Donkyo Seo
Co-founder & CEO, Himedi

For the past 9 years, Donkyo has helped international patients navigate Korean healthcare. Himedi is licensed by Korea's Ministry of Health & Welfare (License #A-2016-01-01-2345). 

Sources

• 2026 ACC/AHA/Multisociety Guideline on the Management of Dyslipidemia, released March 13, 2026. Circulation doi:10.1161/CIR.0000000000001423 · JACC doi:10.1016/j.jacc.2025.11.016
• CAC recommendation wording: American College of Cardiology, "ACC, AHA Release New Clinical Guideline for Managing Dyslipidemia" (acc.org, March 13, 2026)
• Himedi inbound customer inquiries, June – August 2026 (de-identified)