Gastroscopy is one of the most common tests included in health checkup packages in Korea — and for good reason. Korea has one of the world’s highest incidence rates of stomach cancer, and regular screening can help detect the disease at an earlier stage.
Also known as an upper endoscopy, gastroscopy allows a doctor to examine the esophagus, stomach, and the first part of the small intestine using a thin, flexible camera.
If gastroscopy is included in your health checkup package, you will usually be asked whether you prefer a sedated or non-sedated procedure.
This guide explains the differences and what to expect before, during, and after the procedure.
Why Is Gastroscopy Common in Korea?
Gastroscopy is commonly used to detect:
- Gastritis
- Stomach and duodenal ulcers
- Reflux-related changes
- Polyps
- Helicobacter pylori-related changes
- Early signs of stomach or esophageal cancer
Gastroscopy is also commonly used in Korea’s national stomach cancer screening program for eligible adults aged 40 and above.
Private health checkup packages often include gastroscopy as a standard or optional test.
What Happens During a Gastroscopy?
A thin, flexible endoscope is passed through your mouth and into the upper digestive tract.
The doctor examines the lining of your:
- Esophagus
- Stomach
- Duodenum
Air may be introduced to expand the stomach and improve visibility. This can cause temporary bloating or belching.
The procedure itself usually takes around 5–15 minutes, although the total visit takes longer if sedation, recovery, or a biopsy is required.
Sedated Gastroscopy
Sedated gastroscopy is commonly called “sleep endoscopy” in Korea, although you may not be completely unconscious.
Medication is given through an intravenous line to help you relax and reduce discomfort. Many people remember little or nothing about the procedure.
Advantages
- Less gagging and discomfort
- Less anxiety during the examination
- Little or no memory of the procedure for many patients
Disadvantages
- Additional cost
- Longer recovery time
- Possible reactions to sedative medication
- Driving is not allowed after the procedure
- An accompanying adult may be required
You should not drive, operate machinery, drink alcohol, or make important decisions for the rest of the day after sedation.
Non-Sedated Gastroscopy
During a non-sedated gastroscopy, a local anesthetic spray is usually applied to the throat before the endoscope is inserted.
You remain fully awake throughout the procedure.
Advantages
- No sedation-related recovery time
- Lower cost
- You can usually leave shortly after the examination
- Driving restrictions related to sedation do not apply
Disadvantages
- Gagging or throat discomfort
- Greater anxiety for some people
- Difficulty tolerating the procedure in sensitive patients
The examination is usually brief, and medical staff will guide you on how to breathe and relax.
Which Option Should You Choose?
Sedated gastroscopy may be preferable if you:
- Have a strong gag reflex
- Feel anxious about endoscopy
- Previously had difficulty tolerating the procedure
- Prefer not to remember the examination
Non-sedated gastroscopy may be suitable if you:
- Want to avoid sedative medication
- Need to return to normal activities sooner
- Have tolerated endoscopy well in the past
- Do not have someone available to accompany you
The safest option may also depend on your age, medical conditions, current medications, and previous reactions to sedation.
How to Prepare
Follow the fasting instructions provided by your health checkup center.
Most centers ask patients to stop eating the night before a morning examination. Instructions about water and medications may vary.
Before the procedure, tell the center if you:
- Take anticoagulants or antiplatelet medication
- Take diabetes medication or insulin
- Have heart or lung disease
- Have sleep apnea
- Have allergies to medications
- Previously had a reaction to sedation
- Are pregnant or may be pregnant
Do not stop prescription medication without first asking the checkup center or the clinician who prescribed it.
What Is a Biopsy?
If the doctor finds an abnormal area, a small tissue sample may be taken during the gastroscopy. This is called a biopsy.
A biopsy may be used to evaluate inflammation, infection, ulcers, polyps, or possible precancerous or cancerous changes.
The sample is sent to a laboratory for examination. You generally do not feel the tissue being collected.
A biopsy may involve an additional fee, even when gastroscopy is included in your health checkup package. Ask the center whether pathology fees are included in the quoted price.
Testing for Helicobacter Pylori
Helicobacter pylori is a bacterium associated with chronic gastritis, stomach ulcers, and an increased risk of stomach cancer.
Testing may be performed using:
- A biopsy taken during gastroscopy
- A rapid urease test
- A breath test
- A stool antigen test
- A blood antibody test
H. pylori testing is not always included automatically. Ask the center whether it is part of your package and whether an additional charge applies.
What to Expect After the Procedure
After a non-sedated gastroscopy, you can usually leave shortly after the examination.
If throat anesthetic spray was used, wait until the numbness has resolved before eating or drinking, according to the center’s instructions.
After sedation, you will rest in a recovery area until you are awake and stable. Mild drowsiness may continue for several hours.
Temporary symptoms may include:
- Sore throat
- Bloating
- Belching
- Mild nausea
These symptoms usually improve within a short time.
When Should You Seek Medical Attention?
Serious complications are uncommon, but contact the hospital or seek urgent medical care if you develop:
- Severe or worsening chest or abdominal pain
- Vomiting blood
- Black, tar-like stool
- Persistent vomiting
- Difficulty breathing
- Fever or chills
- Severe dizziness or fainting
The risk of bleeding may be slightly higher if a biopsy or another procedure was performed.
How Much Does Gastroscopy Cost in Korea?
The cost depends on whether gastroscopy is part of an NHIS screening or private health checkup package, whether sedation is used, and whether a biopsy or H. pylori test is performed.
In private health checkup packages, standard gastroscopy is often included in the package price.
Sedation is typically available as an add-on for approximately ₩40,000–₩100,000 (US$27–$67).
Biopsy, pathology fees, and H. pylori testing may be charged separately. Always confirm the total price when booking.
All USD estimates are based on an exchange rate of ₩1,500 per US dollar.
Tips for Foreigners
Before making an appointment, ask:
- Is gastroscopy included in the package?
- Is sedation available?
- Is sedation charged separately?
- Do I need someone to accompany me?
- Are biopsy and pathology fees included?
- Is H. pylori testing included?
- Can I receive the report in English?
- When will the results be available?
The term “sleep endoscopy” is commonly used in Korea to describe sedated endoscopy. It does not necessarily mean general anesthesia.
Final Thoughts
Gastroscopy is a common part of health screening in Korea and can identify gastritis, ulcers, polyps, and early stomach abnormalities.
Given the relatively high incidence of stomach cancer in Korea, gastroscopy plays an important role in the country’s health screening system. Its inclusion in many private checkup packages also makes it widely accessible.
Sedated gastroscopy is generally more comfortable but requires additional recovery time and restrictions afterward. Non-sedated gastroscopy is faster and avoids sedative medication but may cause more discomfort.
Choose the option based on your medical history, previous experience, personal preference, and the advice of the checkup center.
Follow all fasting and medication instructions carefully before your examination.
If you have concerns about symptoms or test results, consult a qualified healthcare professional rather than relying solely on this guide.
Have a general question about health checkups in Korea? Feel free to reach out through our Contact page. Please do not submit personal medical information or urgent medical questions.