# Korea screening terms and definitions

> Screening eligibility, examination, diagnosis and participation describe different stages or 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/glossary.

## 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 |

## How do national and private checkups differ?

National screening follows public program rules; a private comprehensive checkup follows a separately agreed program.

A private program can contain an examination with the same name as a national-screening item. The shared name does not make the whole private package an insurance benefit. Separate the publicly funded items from optional tests in any written scope.

Visitors without an applicable NHIS screening entitlement should not assume that a passport or a tourist itinerary grants the national program. Immigration examinations and employer-required certificates are also separate purposes, with their own required forms and designated rules.

**National screening, private checkups and immigration examinations**

| Route | Who defines the scope | How entitlement is checked |
| --- | --- | --- |
| National screening | Public program age, sex and interval rules | NHIS notice and current insurance record |
| Private comprehensive checkup | Agreed examination program | Provider documents and consent |
| Immigration or employment examination | Purpose-specific official requirement | Relevant authority and designated form |

## What can a screening estimate not decide?

A rule comparison does not diagnose, book a visit or retrieve an individual NHIS record.

A birth year, sex and insurance category cannot capture previous tests, risk-group registration, treatment-related deferrals or changes during the year. Conditional items remain conditional even when their age threshold is met.

Korea Checkup Guide uses no patient name, ID number, full birth date or contact form. Calculator fields stay in browser memory. Optional server-side request logging is described separately in the editorial and privacy information.

## What else do people ask about Korea screening terms and definitions?

### 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