# Korea checkup rules and public data

> Participation, institution density and foreign-patient shares measure different populations and require compatible denominators.

Korea Checkup Guide separates a reference rule comparison from an individual NHIS decision. Use the source-specific conditions for the screening year.

Written by the Mirebom Checkup Society editorial team on October 23, 2026. Canonical address: https://kcheckupguide.org/statistics.

## How should public checkup figures be compared?

Participation, institution density and foreign-patient shares measure different populations and require compatible denominators.

For an institution-density calculation, the numerator must use a clear unit. One institution can have more than one screening designation. Adding general, cancer and oral rows can double-count the same institution unless the source explicitly defines a distinct combined count.

A checkup-centre department category does not necessarily identify the reason for a person’s whole trip. Reported foreign-patient totals, visitors, unique people and visits must not be joined as interchangeable counts. Source notes decide whether nationalities and years can be compared.

**Denominators in checkup statistics**

| Indicator | Numerator | Denominator | Interpretation |
| --- | --- | --- | --- |
| Participation | People examined | People eligible for the same program/year | Program uptake, not disease prevalence |
| Institution density | Designated institutions | Population with matching geography/date | Supply count, not appointment capacity |
| Foreign checkup share | Reported checkup-centre patients | All reported foreign patients in same table | Reported medical use, not all tourists |

## What else do people ask about Korea checkup rules and public data?

### Can foreign insured residents use national screening?

Eligible foreign insured residents use the applicable NHIS program conditions. Nationality alone does not replace current insurance and target records.

### Is the calculator an official eligibility lookup?

No. It compares published rules locally and has no access to personal NHIS records or employer lists.

### Why can a past test change the answer?

Some items are offered once in an age band, while treatment or a previous examination can affect selection or deferral.

### Can an annual worker get every cancer test annually?

The annual non-office rule applies to general screening. Cancer programs retain their own age, risk and interval conditions.

### Does a blank statistic mean zero?

No. Blank numerical snapshots are uncollected or incompatible records and are never replaced with estimated observations.

## Where do these numbers come from?

- [Health Screening Implementation Standards (2026-6)](https://www.law.go.kr/LSW/admRulInfoP.do?admRulSeq=2100000272270) - Ministry of Health and Welfare
- [National health screening](https://health.kdca.go.kr/healthinfo/biz/health/gnrlzHealthInfo/gnrlzHealthInfo/gnrlzHealthInfoView.do?cntnts_sn=6671) - Korea Disease Control and Prevention Agency
- [Insurance Benefits](https://www.nhis.or.kr/english/wbheaa02600m01.do) - National Health Insurance Service
- [National Cancer Screening Program](https://www.cancer.go.kr/lay1/S1T261C262/contents.do) - National Cancer Information Center