Same-day gastroscopy and colonoscopy
Both exams are done one after the other under a single sedation, so you fast and prepare only once.
Seoul National University Station Exit 4 · 2-minute walk · Bongcheon-dong, Gwanak-gu, Seoul
Gastroscopy & Colonoscopy near Seoul National University Station
Gwanak Soo Internal Medicine Clinic is a private internal medicine clinic 2 minutes on foot from Exit 4 of Seoul National University Station (Line 2), in Bongcheon-dong, Gwanak-gu, Seoul. Both of our doctors are board-certified internists and gastrointestinal endoscopy subspecialists, and they perform gastroscopy and colonoscopy themselves. From June 2019 to September 2026 we performed 11,334 endoscopies: 8,413 gastroscopies and 2,921 colonoscopies.
What we offer
Polyps removed in the same colonoscopy
In most cases polyps found during colonoscopy are removed right away. Polyps up to 20 mm are removed at the clinic by endoscopic mucosal resection (EMR); in the rare cases that need endoscopic submucosal dissection (ESD), we refer you to a hospital.
Saturday exams
The clinic is open on Saturday from 9:00 to 14:00 without a lunch break. Gastroscopy and colonoscopy are available until 13:00.
A female endoscopist
Dr. Juhee Kim performs gastroscopy and colonoscopy on every clinic day except Friday, including Saturday. Ask for her in your request.
Health check-ups
Blood tests, ultrasound (abdomen, thyroid, breast, heart and carotid) and endoscopy. Results of routine blood tests are ready in 1 to 2 days, and biopsy results in about 1 week.
Reports you can take home
Your comprehensive blood test results come with an explanation sheet in your own language, and your endoscopy and ultrasound images are sent to you by email as files, so you can show them to your doctor at home. If you leave Korea before we can explain the results, we send you a summary by email.
Visa medical exams and English documents
We carry out the immigration medical examination for visa types D-3, E-2, E-6, E-8, E-9 and H-2, and issue English medical certificates.
Sedated endoscopy, safely monitored
The endoscopist manages the sedation, and oxygen saturation, blood pressure and ECG are monitored throughout. After a sedated exam you rest for 30 minutes to 1 hour and must not drive that day.
Our doctors
Dr. Jinseok Yoo
Head physician. Board-certified internist and gastrointestinal endoscopy subspecialist. Former professor at the Gangnam Severance Check-up Center.
Dr. Juhee Kim
Board-certified internist and gastrointestinal endoscopy subspecialist. Former clinical fellow and adjunct professor of gastroenterology at Daejeon St. Mary’s Hospital, The Catholic University of Korea.
Before your exam
Fast for at least 8 hours before gastroscopy or colonoscopy. You may drink water until 2 hours before the exam.
For colonoscopy, avoid hard-to-digest foods from 3 days before. On the day before, eat only a light breakfast and lunch, eat nothing after 2 pm, and drink plenty of water or sports drinks. The bowel preparation medicine is collected at the clinic in advance, with instructions in English:
If you take blood thinners or diabetes medicine, tell us in your request; do not stop any medicine without advice from the doctor who prescribed it.
Please bring your passport — it is required for sedated endoscopy. Foreign patients who have gastroscopy or colonoscopy under sedation must bring their passport to the clinic on the day. After sedation, come with someone or do not drive for the rest of the day.
Prices without Korean health insurance
If you are not covered by Korean National Health Insurance, every test is paid in full by you. Our check-ups come in three sets, so you know the total before you start.
| Set | What is included | KRW |
|---|---|---|
| A. Basic | Comprehensive blood test · urine test · upper abdominal ultrasound · thyroid ultrasound · body composition (InBody) · ECG · chest X-ray · results explained by the doctor | 250,000 |
| B. Basic + Stomach | Set A + gastroscopy under sedation | 350,000 |
| C. Basic + Stomach + Colon | Set A + gastroscopy and colonoscopy under sedation + bowel-prep medicine | 600,000 |
Choose your ultrasound
You can swap the upper abdominal and/or thyroid ultrasound for a breast, heart (echocardiography) or carotid ultrasound. This applies to all three sets. If the new one costs more, you pay only the difference:
| Swap | Breast | Heart | Carotid |
|---|---|---|---|
| Instead of upper abdominal | no charge | +20,000 | no charge |
| Instead of thyroid | +40,000 | +60,000 | no charge |
There is no refund when you swap to a lower-priced ultrasound.
Add an ultrasound: breast +80,000 · heart (echocardiography) +100,000 · carotid +40,000 · upper abdominal +80,000 · thyroid +40,000 KRW.
Examples: Set A + breast ultrasound = 330,000 KRW. Set C with the thyroid ultrasound swapped for a heart ultrasound = 660,000 KRW.
Biopsies are included. If the doctor decides a biopsy is needed during gastroscopy (Sets B and C) or colonoscopy (Set C), there is no extra charge. If no biopsy is needed, the price stays the same.
Bowel-prep medicine (Set C): choose Halfprep (2 L liquid, included), Orafang (tablets, included) or OnePrep 1.38 (1.38 L liquid, +15,000 KRW). Each link opens step-by-step instructions in English.
If polyps are found in the colon (Set C only)
You decide before the exam whether you want polyps removed. If you choose removal and polyps are found, it is 200,000 KRW more, no matter how many, including the lab test of the removed tissue. The doctor removes only polyps that can be safely removed at the clinic. A large or high-risk polyp is not removed here; we refer you to a hospital instead, and the 200,000 KRW is not charged.
Not included
Treatment of complications such as bleeding or perforation, hospital referral, and additional endoscopy at another hospital.
What you receive
After your check-up you take home written results you can show to your doctor in your own country. These are samples of what we give you.
Request an appointment
Thank you. Your request has been sent. We will reply by email to confirm the date and time. Please bring your passport — it is required for sedated endoscopy.
With Korean National Health Insurance, your exam may be covered by insurance depending on the reason for the exam. Please book on our regular booking page instead of this form.
Book on our regular booking page (in Korean)
Or call +82-2-871-1936. We do not take email requests from patients with Korean health insurance.
Frequently asked questions
How much does a colonoscopy cost without Korean health insurance?
Without Korean National Health Insurance, colonoscopy is offered as part of Set C (600,000 KRW), together with gastroscopy under sedation and the basic check-up (blood and urine tests, upper abdominal and thyroid ultrasound, body composition, ECG, chest X-ray and the doctor’s explanation). Set C includes bowel-prep medicine — Halfprep 2 L liquid or Orafang tablets, or OnePrep 1.38 (1.38 L liquid) for 15,000 KRW more — and any biopsy the doctor finds necessary. If you choose polyp removal before the exam and polyps are found, it is 200,000 KRW more, no matter how many. Gastroscopy with the check-up is Set B (350,000 KRW), and the basic check-up alone is Set A (250,000 KRW). If you want only the endoscopy without the check-up, see the next question. In every set, you can swap the upper abdominal and/or thyroid ultrasound for a breast, heart (echocardiography) or carotid ultrasound; if the new one costs more, you pay only the difference (for example, a heart ultrasound instead of the thyroid ultrasound is 60,000 KRW more), with no refund for a lower-priced one. You can also add an ultrasound: breast 80,000, heart 100,000, carotid 40,000, upper abdominal 80,000 or thyroid 40,000 KRW.
Can I have only a gastroscopy or a colonoscopy (without the check-up)?
Yes. Without Korean National Health Insurance: sedated gastroscopy is 150,000 KRW (consultation and any biopsy included); sedated colonoscopy is 250,000 KRW (bowel-prep medicine Halfprep or Orafang included, OnePrep 1.38 15,000 KRW more; any biopsy included); both on the same day are 350,000 KRW with one sedation. Polyp removal is 200,000 KRW more, no matter how many (only with colonoscopy). Write what you want in the notes of your request and choose “Not sure — please advise”. Please bring your passport — it is required for sedated endoscopy.
Can I have gastroscopy and colonoscopy on the same day?
Yes. Both exams are done one after the other under a single sedation, so you fast and prepare only once. In most cases polyps found during the colonoscopy are removed in the same session.
How do I book an appointment?
Send the request form on this page with two or three preferred dates. It is a request, not an instant booking: we reply by email to confirm the date and time and send the preparation instructions. You can also call +82-2-871-1936.
Can I get medical documents in English?
Yes. We issue English medical certificates and carry out the immigration medical examinations for visa types D-3, E-2, E-6, E-8, E-9 and H-2. Bowel preparation instructions are available in English.
How do I get there from Seoul National University Station?
Take Exit 4 of Seoul National University Station (Line 2) and walk about 2 minutes along Nambusunhwan-ro. The clinic is on the 2nd floor of the KFC building, and the building has an elevator. From Incheon Airport take AREX to Hongik Univ. and then Line 2; from Gimpo Airport take Line 5 and then Line 2; from Seoul Station or Myeongdong take Line 4 to Sadang and then Line 2; from Gangnam take Line 2 directly. Step-by-step directions are on our directions page: https://www.gwsooclinic.com/en/directions
What do I need to bring for sedated endoscopy?
Foreign patients must bring their passport to the clinic on the day of a sedated gastroscopy or colonoscopy; it is required. Fast for at least 8 hours (water is fine until 2 hours before), and come with someone or do not drive for the rest of the day.
Is there a female doctor?
Yes. Dr. Juhee Kim performs gastroscopy and colonoscopy on every clinic day except Friday, including Saturday. Please ask for her in your request. The clinic itself is open on Fridays.
Are you open on Saturday?
Yes. On Saturday the clinic is open from 9:00 to 14:00 without a lunch break, and gastroscopy and colonoscopy are available until 13:00.
Hours and location
| Monday–Friday | 9:00–18:00 (lunch break 13:00–14:00) |
|---|---|
| Saturday | 9:00–14:00, no lunch break (exams until 13:00) |
| Sunday and public holidays | Closed |
Registration closes at 12:30 and 17:40 on weekdays and at 13:30 on Saturday.
Address: 2F, 1810 Nambusunhwan-ro, Gwanak-gu, Seoul 08787, Korea (KFC building, Bongcheon-dong). From Exit 4 of Seoul National University Station (Line 2) it is about a 2-minute walk; the clinic is on the 2nd floor of the KFC building, and the building has an elevator.
- Incheon Airport: AREX to Hongik Univ., then Line 2 (11 stops), or airport bus 6017
- Gimpo Airport: Line 5 to Yeongdeungpo-gu Office, then Line 2 (8 stops)
- Seoul Station: Line 4 to Sadang, then Line 2 (2 stops)
- Myeongdong: Line 4 to Sadang, then Line 2 (2 stops)
- Gangnam: Line 2, 6 stops, no transfer
Full directions from the airports, Seoul Station, Myeongdong and Gangnam →
The parking lot on the ground floor is not run by the clinic (2,000 KRW for the first 30 minutes, then 1,000 KRW per 30 minutes).
Phone: +82-2-871-1936
Designated national health screening institution · Ministry of Justice designated hospital for employment medical examinations · Contracted institution of the National Immunization Program.