Health Checkup Eligibility Inquiry and Correct Fasting Preparation Guide

Introduction: Why Thorough Preparation is Important for Getting a Proper Health Checkup

📋 Introduction: Why Thorough Preparation is Important for Getting a Proper Health Checkup
You have probably received health checkup notification letters sent from the National Health Insurance Service every year or every other year at least once. When people actually receive the notification letter, they very often postpone it, thinking, “I can just reserve it and get it done casually when I have time later,” or they rush and get their checkup done on the day of their hospital visit without any particular preparation.
However, a health checkup is not simply a procedure to stamp a form formally. It is a precious opportunity to discover hidden warning signs in your body and prevent diseases early. Let’s look into why thorough preparation determines the success or failure of your checkup.

1. A Shortcut to Preventing Wasted Effort and Retests

Representative cases of suffering misfortune after visiting the hospital without preparation are failing to understand fasting times or failing to control medication intake.
If you fail to maintain an accurate fasting state, the results of blood tests (blood sugar, cholesterol, etc.) or gastrointestinal endoscopy exams can become distorted.
As a result, abnormal figures come out, leading to situations where you must undergo a retest or fail to make an accurate diagnosis, causing you to waste precious time all over again.

1. Pre-Checks That Boost Checkup Accuracy to 100%

Understanding Your Body’s Condition: A single minor factor, such as food eaten the previous day, regular medications taken, or your condition the day before, can affect exam results.
Filling Out Questionnaires in Advance: Rather than writing them down frantically while waiting at the hospital, carefully completing the questionnaire at home in advance and visiting allows for more accurate consultation with medical staff.
💡 Tip: The accuracy of a health checkup varies completely depending on “how you prepare and receive it” as much as simply “receiving it.”
In the next section, we will learn how to check whether you are eligible for a health checkup this year most easily and quickly on PC and mobile!

How to Check Your Health Checkup Eligibility This Year (PC & Mobile)

📋 How to Check Your Health Checkup Eligibility This Year (PC & Mobile)
Checking whether you are eligible for a national health checkup this year is much simpler than you think. Choose whichever method is more convenient for you between PC and smartphone (mobile) and check it out in just 1 minute!

1. How to Check via PC (National Health Insurance Service Website)

This is the recommended method when you want to check step by step on a large screen.

1. Accessing the Official Website: Search for “National Health Insurance Service” on a portal site and access the official website.
2. Logging In: Click [Login] in the upper right corner and log in quickly via simple authentication (KakaoTalk, Naver, PASS, etc.).
3. Finding the Health Checkup Eligibility Inquiry Menu:

Directly click the [Health Checkup Eligibility Inquiry] icon on the main screen, or
navigate in order through the top menu: [Health In] ➡️ [Health Checkup] ➡️ [Health Checkup Eligibility Inquiry].

1. Checking Eligibility: When the page opens, you can check in detail by category whether you are eligible for a general health checkup this year and whether you are eligible for cancer screenings (stomach cancer, colorectal cancer, breast cancer, etc.).
2. How to Check Easily via Smartphone (‘The Health Insurance’ App)

This is a method to easily check using your smartphone app when you don’t want to turn on your PC.

1. App Installation and Execution: Search for the ‘The Health Insurance’ app in the Google Play Store (Android) or App Store (iOS), download it, and run it.
2. Simple Login: After running the app for the first time, complete login through simple authentication.
3. Checking Eligibility:

Tap [Health Checkup Eligibility Inquiry] or the related menu on the main app screen.
The checkup items you need to receive this year and your eligibility status will immediately appear on the screen.
💡 Blog Tip Summary
Once you have finished checking your eligibility, be sure to check in advance for designated hospitals near your home or office using ‘Find Checkup Facility’ at the bottom of the page. Since reservations rush in at the end of the year and it can be difficult to secure your desired date, it is best to check your schedule in advance!
In the next section, we will take a detailed look at ‘Correct Fasting Times and Precautions’, which people find most confusing before a checkup.

[Core 1] Essential Course Before a Checkup! Correct Fasting Times and Precautions

We are writing the main text for the third subheading of the Naver blog post, ‘[Core 1] Essential Course Before a Checkup! Correct Fasting Times and Precautions’. We have clearly organized it by category so that readers can easily refer to it in daily life.
📋 [Core 1] Essential Course Before a Checkup! Correct Fasting Times and Precautions
Once your health checkup reservation date is set, the very first thing you need to pay attention to is ‘fasting’. Because nutritional components in the blood and the condition of your gastrointestinal tract are directly reflected in the test results, minor carelessness can lower the reliability of the entire checkup.
Check the fasting times and precautions that you must follow for accurate checkup results.

1. Strict Fasting Time Criteria (Minimum 8 Hours to 12 Hours)

Fasting Maintenance Time: Generally, you should finish dinner lightly the day before the checkup and enter fasting from 9 PM (or midnight) the night before the checkup.
Usually, you must maintain a fasting state of at least 8 hours, with 12 hours recommended, so that blood test values such as blood sugar, triglycerides, and cholesterol are measured accurately without being distorted.
If you have an upper gastrointestinal endoscopy coming up, you must strictly comply with the provided guidelines because you need to block out not only food but all factors that can stimulate gastric juice secretion.

1. Water, Coffee, Gum… Can I Have Them While Fasting?

Many people get confused and wonder, “Can’t I drink just a little bit of water?”
Water: If you are thirsty on the morning of the checkup, a small amount of plain water (about half a paper cup) is often allowed, but since it can vary depending on the hospital’s guidance guidelines, it is safest not to drink any right before the checkup if possible. (However, during an upper gastrointestinal endoscopy, you cannot drink anything at all, including water.)
Coffee, Tea, and Milk: Caffeine and dairy products stimulate gastric acid secretion and affect test results, so they are strictly prohibited.
Gum, Candy, and Cigarettes: Chewing gum, eating candy, and smoking also affect digestive fluid secretion, blood pressure, and pulse, thereby lowering test accuracy, so you must definitely refrain from them during the fasting period.

1. What Should I Do with Regular Medications (Blood Pressure Medication, Diabetes Medication, etc.)?

Blood Pressure Medication: If you normally take blood pressure medication, it is generally common to take it with a small amount of water early in the morning on the day of the checkup (usually 2 to 3 hours before the checkup). This is because if your blood pressure is high, the endoscopy or blood drawing itself may become impossible.
Diabetes Medication: Because insulin or diabetes pills can induce hypoglycemia shock during fasting, you must never take them on the morning of the checkup; instead, visit the hospital and consult with the medical staff.
※ However, if you are taking any medications, checking by informing the hospital in advance when making your checkup reservation is most accurate.
V> 💡 Blog Tip Summary
A single sip of water or a piece of gum that you consumed thinking “Surely a little bit won’t hurt” can trigger a retest! To be safe, please cut off all food, drinks, and cigarettes from 9 PM the night before the checkup and maintain a fasting state.
In the next section, we will check out a checklist by behavioral factor that is easy to miss, ranging from the diet the day before the checkup to tooth brushing on the day of!

[Core 2] Checklist by Behavioral Factor for the Day Before & Day Of to Increase Checkup Accuracy

We are writing the main text for the fourth subheading of the Naver blog post, ‘[Core 2] Checklist by Behavioral Factor for the Day Before & Day Of to Increase Checkup Accuracy’. We have neatly organized it by behavioral factor so that readers can grasp it at a glance and put it into practice.
📋 [Core 2] Checklist by Behavioral Factor for the Day Before & Day Of to Increase Checkup Accuracy
Did you know that on the day before and the day of a health checkup, a single careless action can have a huge impact on your test results? To avoid the hassle of retests and check the accurate state of your body, we have organized a checklist by behavioral factor that you must follow.

1. [The Day Before Checkup] Diet Management and Precautions

Light and Soft Dinner: It is recommended to eat a lighter dinner than usual the day before. In particular, you must completely finish dinner before 9 PM the night before the checkup.
Foods to Avoid:
Greasy Foods (Pork belly, chicken, etc.): They increase triglyceride levels in the blood, negatively affecting blood test results.
Overeating and Excessive Drinking: They put a strain on the digestive system, which can interfere with the upper gastrointestinal endoscopy or abdominal ultrasound exam the next day.
Spicy and Irritating Foods (Spicy foods, red fruits, etc.): They irritate the intestines, which may cause misinterpretations during a colonoscopy or stool test.

1. [Morning of the Checkup] Essential Behavioral Rules

Absolute Prohibition of Breakfast and Snacks: You must strictly maintain a fasting state, including gum, candy, coffee, and milk.
Can I Brush My Teeth?: Light tooth brushing in the morning is fine, but you should be careful not to swallow toothpaste or water during the brushing process and just rinse lightly.
No Smoking: Nicotine constricts blood vessels and affects blood pressure and pulse, so smoking on the morning of the checkup is strictly prohibited.

1. [Female Checkup Examinees] Special Precautions

Checkup During Menstruation: Since urinalysis and cervical cancer screening results may not be accurate during menstruation, it is safer to visit and get tested 2 to 3 days after menstruation ends.
Possibility of Pregnancy: If you are pregnant or there is a possibility of pregnancy, radiation exams such as X-rays (chest imaging), upper gastrointestinal series, or CT scans can be harmful to the fetus, so you must inform the medical staff in advance before the checkup.
💡 Blog Tip Summary
Staying away from greasy foods the night before the checkup and going to bed early is already half the success of your checkup preparation!
In the next section, we will learn about essential preparation items you must bring before visiting the hospital and tips on filling out questionnaires in advance to drastically reduce waiting time.

Essential Preparation Items Before Visiting the Hospital and How to Fill Out Questionnaires in Advance

📋 Essential Preparation Items Before Visiting the Hospital and How to Fill Out Questionnaires in Advance
Maintaining your fast from the day before the checkup and preparing thoroughly—it’s finally the day of the checkup! Before visiting the hospital, we have organized essential items you must bring and great tips on filling out the questionnaire in advance to significantly reduce waiting time.

1. Essential Preparation Items Checklist Before Visiting the Hospital

To avoid panicking when you arrive at the hospital on the day of the checkup, be sure to check inside your bag before leaving.
Identification Card (Mandatory): You must bring a public identification card for identity verification, such as a resident registration card, driver’s license, or passport. Without an ID, the checkup itself may be impossible.
Questionnaire and Consent Form: If you haven’t filled it out in advance, you will need to write a paper questionnaire at the hospital, so those who wear glasses must be sure to bring your glasses (or lenses). (Required for vision tests.)
Prescription or Memo of Medications Being Taken: If there are medications you take consistently, it is best to bring a memo or prescription with the disease name and medication names written down and accurately convey them to the medical staff during the consultation.

1. How to Fill Out the ‘Electronic Questionnaire’ in Advance to Cut Waiting Time in Half

When you arrive at the hospital, the most exhausting moment is filling out dense paper questionnaires in the lobby and waiting. If you use the National Health Insurance Service website or mobile app, you can fill them out in advance at home.

1. Advance Completion Path:

Log in to the National Health Insurance Service website or the ‘The Health Insurance’ app.
Navigate to the [Health Checkup] ➡️ [Write Health Checkup Questionnaire] menu.

1. Filling Out the Questionnaire:

Check the questionnaire and preliminary items for early disease detection (smoking, drinking, exercise habits, etc.) and complete submission.

1. Hospital Submission Completion:

If you complete it online in advance and visit the hospital, simply stating “I filled out the questionnaire in advance” upon reception allows it to be checked immediately, tremendously reducing your waiting time.
💡 Blog Tip Summary
Suprisingly, quite a few people turn back because they forgot to bring their ID. Before leaving, be sure to double-check for ‘ID’ and ‘glasses’ right in front of your front door!
In the final next section, we will comprehensively summarize the core contents of today’s post and deliver closing remarks.

Conclusion: The Wisest First Step to Protect Your Body, Thorough Preparation

📋 Conclusion: The Wisest First Step to Protect Your Body, Thorough Preparation
We have thoroughly explored everything from checking health checkup eligibility through the National Health Insurance Service website and mobile app, to correct fasting times to increase checkup accuracy, a checklist by behavioral factor for the day before and the day of, and methods for filling out questionnaires in advance.
A health checkup is not simply a formality of visiting a hospital, but the surest shield to protect your body without missing minor signals.
💡 Summary of Today’s Key Points and Closing Request

1. Check Eligibility Early: Since reservations surge at the end of the year, making it difficult to receive a checkup on your desired date, check your eligibility in advance and schedule your dates when you have spare time.
2. Thorough Preparation Equals Accuracy: You must carefully look after compliance with fasting times, control of regular medication intake, and bringing your ID and glasses to prevent the hassle of making a second trip.
3. Shorten Waiting Time with the Electronic Questionnaire: If you comfortably fill out the questionnaire in advance at home via the ‘The Health Insurance’ app or website and visit, you can finish your checkup much more pleasantly.

We hope you securely protect your precious health this year as well through thorough preparation and smart health management!
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