2 primary sources checked1 reported, unconfirmedReviewed 12 Aug 2026
Exosome treatments — marketed as an advanced “cellular” upgrade to standard skin boosters — have become one of the most heavily promoted add-ons at Korean skin clinics. They also sit in one of the clearest regulatory gaps in the industry: not approved as a drug anywhere that matters, banned from cosmetic advertising in Korea, and the subject of at least one court case over what happens when a doctor injects one anyway.
No FDA-approved exosome product exists
The U.S. Food and Drug Administration has been explicit on this point since a public safety notification issued December 6, 2019: “There are currently no FDA-approved exosome products.” The agency classifies exosomes intended to treat or prevent disease as drugs and biological products, meaning they require premarket review — the same bar as any new medication. That statement has not changed as of 2026; the approval count remains zero. The FDA’s notification followed reports of serious adverse reactions in patients who received unapproved exosome products at U.S. clinics, and it recommends patients ask any provider offering exosome treatment for the product’s investigational drug (IND) application number before proceeding — a number that, for cosmetic use, generally does not exist.
Korea moved to restrict the marketing, not the treatment
South Korea’s drug and cosmetics regulator, the Ministry of Food and Drug Safety (MFDS), revised its cosmetic labeling and advertising guidance on January 21, 2025, expanding the list of banned claims. “Exosome” was added directly — cosmetics can no longer market themselves using the term, alongside other newly banned phrases like “hospital-exclusive,” “dermatology-clinic-use,” and specific numeric anti-aging claims. The restriction targets advertising language for cosmetic products, not the clinical use of exosome injections themselves, which fall under a separate part of the regulatory system entirely.
A Seoul court has already ruled on what happens when the line is crossed
In a decision dated April 11, 2025, the Seoul Administrative Court’s First Division upheld a three-month license suspension for a physician who, in August 2022, injected a topical cosmetic product called ASCE+ — registered only as a cosmetic, not approved as a drug and never reported for injectable use — directly into a patient’s face by hand. The court’s reasoning is worth noting: it held that what matters is not how a product is labeled or where it’s sold, but how it’s actually used and what it physiologically does once injected. The ruling found the unauthorized injection itself was the violation, independent of whether the patient was harmed.
What this means if a clinic offers you an “exosome” treatment
The word itself tells you very little. It doesn’t confirm the product is a genuine biologic exosome preparation, doesn’t confirm it’s approved for injection anywhere, and in Korea, a clinic marketing a cosmetic product by that name is technically violating advertising rules that took effect in 2025. Worth asking directly: what is the product’s actual regulatory classification — cosmetic or drug — and is it approved or reported for injectable use. If a clinic can’t answer clearly, that’s the same signal covered in the MFDS’s advertising crackdown and the court’s ruling: a product’s marketing name and its actual legal status are two different things.
Regulatory statements and case details in this article are drawn from the FDA’s public safety notification, MFDS guidance documents, and Korean court reporting on the April 2025 Seoul Administrative Court ruling.
1 primary source checked1 reported, unconfirmedReviewed 12 Aug 2026
If a treatment goes wrong in Korea, there is a formal, government-run path to a resolution that doesn’t require a lawsuit: the Korea Medical Dispute Mediation and Arbitration Agency, known as K-MEDI. It’s open to foreign patients, it’s inexpensive to file with, and a successful mediation carries the same legal weight as a court settlement. It also has a structural weak point that matters specifically for cosmetic and dermatology cases, and most foreign patients never learn about it until they need it.
How the process works, and what it costs
Filing costs 22,000 won for smaller claims, with the fee scaling up for larger claim amounts — for example, a 10 million won claim carries a 32,000 won filing fee. Fee waivers exist for recipients of basic livelihood support and national merit recipients, with discounts for people with disabilities. Applications can be submitted online, in person, or by mail or fax, and the case is formally registered within one to two business days after the fee is paid.
Once filed, the law sets a target processing window of 90 days, extendable by 30 more — a maximum of 120 days — though time spent gathering documents or waiting on medical assessments doesn’t count against that clock, so real cases can run longer.
The scenario that determines whether you get a hearing at all
This is the part that matters most. Under the law governing the system, mediation proceedings start automatically — without the clinic’s agreement — only in three situations: the patient died as a result of the treatment, the patient has been unconscious for one month or longer, or the patient suffered a severe, legally defined disability. That automatic-start rule has applied since November 30, 2016.
Outside those three scenarios — which cover the large majority of cosmetic and dermatology complaints, since these procedures are rarely fatal or disabling — the clinic has to actively agree to participate. If the clinic doesn’t respond within 14 days of being notified of the complaint, the case is dismissed and the process ends there. There is no requirement that a clinic explain its refusal, and no mediation happens without it.
What this means in practice
If your complaint involves a botched injectable, an unexpected scar, or a billing dispute — the overwhelming majority of what foreign patients report — K-MEDI can still hear your case, but only if the clinic chooses to show up. A non-response is functionally the same as a refusal, and it costs the clinic nothing.
This doesn’t make the process pointless. Filing creates an official record, costs very little, and a clinic that’s confident it did nothing wrong often has more incentive to participate than one that doesn’t. But it’s worth going in with an accurate picture: for most cosmetic-treatment disputes, K-MEDI is a channel that requires the other side’s cooperation, not a guaranteed hearing.
Figures on filing fees, processing timelines, and the automatic-initiation rule are drawn from the Korea Medical Dispute Mediation and Arbitration Agency’s own published procedure guidance and legal-practice summaries of the underlying statute.
South Korea has no general legal requirement for medical clinics to carry malpractice or liability insurance. A clinic can operate, and treat domestic patients, without one. That surprises most foreign visitors, who tend to assume insurance coverage is a baseline of running any medical business — it isn’t, here.
There is one category of clinic where insurance is mandatory: institutions formally registered to treat foreign patients.
The one legal requirement that applies to you
Under the Act on Support for Overseas Expansion of Medical System and Attraction of International Patients — the law governing Korea’s foreign-patient industry — a medical institution seeking to legally treat and bill foreign patients must register with the government, and registration comes with conditions. The clinic must have at least one specialist physician on staff in the relevant department, and it must carry medical malpractice liability insurance with coverage of at least 100 million won for clinics and hospitals, or 200 million won for general hospitals — with foreign patients explicitly included in the policy’s coverage. This requirement took effect June 23, 2017, following a one-year grace period after the law’s passage.
In practice, this means the “registered foreign-patient institution” status isn’t just paperwork — it’s the only reliable signal, short of asking a clinic directly and trusting the answer, that liability insurance covering you as a foreign patient actually exists.
How to check before you book
The government runs a public lookup system for this exact purpose: the Medical Korea international patient portal (medicalkorea.or.kr), operated by the Korea Health Industry Development Institute. It offers two ways to search — by the clinic’s business registration number, or by institution name with filters for region and status. A clinic that markets itself to international patients but doesn’t appear in this registry isn’t necessarily unsafe, but it does mean the insurance requirement described above doesn’t legally apply to it.
This is worth checking before you commit to a clinic, not after. Ask for the clinic’s business registration number as part of your initial inquiry — a legitimate, registered clinic will hand it over without hesitation — and run it through the portal yourself.
What this doesn’t tell you
Registration confirms a minimum insurance floor and at least one specialist on staff. It does not verify who will actually perform your procedure, what a policy pays out in practice, or whether the clinic has a history of disputes. It’s one data point, not a full background check — but it’s a free one, backed by a public registry, and most tourists never think to look.
This article describes a legal requirement and a public verification tool; it does not evaluate or rank individual clinics. Readers should confirm current details directly with the Medical Korea portal, as registries are updated periodically.
Sources: Act on Support for Overseas Expansion of Medical System and Attraction of International Patients, Article 6 — registration of medical institutions attracting foreign patients requires at least one specialist physician per relevant department under Article 77 of the Medical Service Act, and enrolment in medical malpractice liability insurance prescribed by Ministry of Health and Welfare ordinance or in the medical indemnity mutual aid association under the Act on Remedies for Injuries from Medical Malpractice and Mediation of Medical Disputes; registration is valid for three years. Registration status is searchable on the Ministry-operated Medical Korea portal. Statutory text confirmed 12 August 2026.
2 primary sources checked1 reported, unconfirmedReviewed 12 Aug 2026
For nine years, a foreign patient who had skin resurfacing, a wrinkle treatment, double-eyelid surgery, fat-dissolving injections, or breast augmentation in South Korea could file for a 10 percent VAT refund on the procedure. As of January 1, 2026, that refund no longer exists — and the bill written to bring it back is currently sitting in a National Assembly subcommittee with no passage date attached.
What actually changed
The refund was introduced in 2016 to help draw foreign patients into Korea’s cosmetic and dermatology market. The National Assembly passed a Restriction of Special Taxation Act amendment removing the provision, and the special refund period ended December 31, 2025. There was no extension in the government’s 2026 tax reform package.
The scale of what disappeared is documented in the government’s own figures. Foreign medical tourism spending reached 1.24 trillion won in 2024 — roughly three times the 2019 level — with cosmetic surgery and dermatology accounting for 77.3 percent of that total. The refund program itself paid out a record 9.55 billion won in 2024, and 8.26 billion won in the first half of 2025 alone, shortly before it ended.
The bill that’s trying to reverse it
In April 2026, Rep. Jo Gye-won and 11 co-sponsors introduced an amendment to reinstate the refund, proposing to extend the special provision through December 31, 2027. The bill was referred to the tax and fiscal policy subcommittee on July 29, 2026. As of this writing, it has not been passed, and no date for a vote has been set.
The sponsors’ stated rationale is that ending the refund weakened Korea’s price competitiveness in the global medical tourism market and reduced the incentive to attract foreign patients. Industry groups have pushed the same argument publicly, warning of price competitiveness loss, reduced pricing transparency, and patients shifting to competing destinations.
What this means if you’re booking now
If you’re researching or booking treatment in Korea in 2026, the 10 percent refund that older guides, forum posts, and clinic marketing may still reference is not currently available. Clinics that continue to advertise “VAT refund” promotions may be referring to a separate, unrelated discount, or to a refund structure that no longer applies to the procedures it used to cover — worth confirming directly, in writing, before you assume a discount applies to your quote.
Whether the refund returns depends on a bill that, as of August 2026, is still in committee. There’s no reliable timeline for a vote, and no guarantee the current draft — extension through the end of 2027 — is what eventually passes, if anything does.
Figures and dates in this article are drawn from Korean government tax data and National Assembly bill records, cross-checked across multiple independent news reports. This article will be updated if the bill’s status changes.
In the Korea Consumer Agency’s analysis of 322 redress applications concerning cosmetic and aesthetic medical services, 163 (50.6%) were contract disputes and 124 (38.5%) concerned adverse effects. The largest single group within the contract cases was refusal to refund a prepayment. Where a clinic justified that refusal with a signed no-refund form, the agency’s position is that the clause is void.
Foreign patients arriving for skin or cosmetic work tend to worry about the same thing: something going wrong on the table. Scarring, asymmetry, a burn from a laser.
Korea’s consumer regulator keeps records of what people actually complain about. Those records say something different. The most common dispute is not medical. It is about money you already paid and cannot get back.
Where these numbers come from
The Korea Consumer Agency (한국소비자원) is a government body that takes consumer redress applications and publishes analyses of them. In May 2021 it published a study of 322 redress applications concerning cosmetic and aesthetic medical services, filed over 2019 and 2020. Over the same two years, its call centre logged 10,213 consultations tagged to plastic surgery or dermatology clinics.
Two limits, stated up front:
These are complaints filed in Korean by consumers in Korea. The agency does not break the figures out by nationality, so this is not a foreign-patient dataset. It is the closest public record of what goes wrong in these clinics.
Filed complaints are not a census of outcomes. They tell you what generates disputes, not how often treatment succeeds.
What do patients actually complain about?
Type of complaint
Cases
Share
Contract-related
163
50.6%
Adverse effects
124
38.5%
Insufficient results
23
7.2%
Other (misdiagnosis, delay)
12
3.7%
Contract disputes outnumber every medical category. Within those 163 contract cases, the pattern is narrow:
Refusal to refund a prepayment — 97 cases (59.5%)
Excessive deduction from the refund — 66 cases (40.5%)
Sixty-one of those refusals happened before the procedure had even started. The patient paid, changed their mind, and was told no.
Is a no-refund waiver enforceable in Korea? Probably not
This is the part worth carrying with you.
Of the 97 refund refusals, the clinic’s stated reason was:
Reason given
Cases
Share
Patient signed a no-refund consent form
31
31.9%
Patient was told verbally that refunds weren’t possible
22
22.7%
Simple refusal, no reason
15
15.5%
Other (refund window expired, event pricing, clinic policy, transfer only)
29
29.9%
More than half rested on a waiver — signed or spoken.
The Korea Consumer Agency’s position is that this does not hold. Article 689(1) of the Civil Act gives either party to a mandate contract the right to terminate at any time. A clause that removes or restricts that right is treated as void under Article 9(1) or 9(4) of the Act on the Regulation of Terms and Conditions. The Consumer Dispute Settlement Commission has ruled accordingly.
In plain terms: a clinic can hand you a no-refund form, you can sign it, and Korea’s own dispute body may still treat the clause as unenforceable. Signing it does not end the argument. It is the beginning of one you can win.
When it is medical, it is mostly the face
Of the 147 applications involving adverse effects or insufficient results:
Procedure
Cases
Share
Eye surgery
34
23.1%
Facial laser
28
19.0%
Nose surgery
15
10.2%
Botox
13
8.8%
Filler
11
7.5%
Contouring injection
9
6.1%
And what actually went wrong:
Problem
Cases
Share
Scarring
31
21.0%
Asymmetry
21
14.3%
Inflammation
21
14.3%
Insufficient result
23
15.6%
Pigmentation
14
9.5%
Burns
5
3.4%
Facial laser sits second on the list. It is also the treatment most often sold to visitors as low-risk and same-day.
The advertising finding that applies directly to you
The Korea Consumer Agency then went back and monitored the online advertising of the clinics these complaints were filed against. Of 226 clinics, 190 were advertising online. Seventy-one of them — 37.4% — were running advertising suspected of breaching Article 56 of the Medical Service Act. Ninety-two such advertisements were identified.
Suspected breach
Ads
Share
Patient testimonials creating a false impression of efficacy
32
34.8%
Use of awards, certificates, endorsements
20
21.7%
Unregistered clinics advertising to attract foreign patients
19
20.7%
Exaggerating objective fact
13
14.1%
Claiming qualifications with no legal basis
8
8.7%
That third row is the one aimed at you. Article 56(2)12 of the Medical Service Act prohibits domestic advertising aimed at attracting foreign patients unless the clinic is registered to treat them. Nearly a fifth of the suspect advertising was clinics soliciting foreign patients they were not registered to take.
The 2021 study is the most recent full analysis we have read in the original. The agency has since issued a consumer alert on prepaid treatment fees reporting a sharper version of the same pattern — roughly 1,198 prepayment-related redress applications between 2022 and the first quarter of 2025, with dermatology the single largest specialty at about 35.8%, and contract termination and penalty disputes accounting for about 83.7% of them.
We have not obtained that alert in its original form, so we present those figures as reported rather than verified. The direction, at least, matches: the argument is about the money.
What this changes about how you book
Get the refund terms in writing before you pay, and keep the quote. The dispute you are most likely to have is this one.
Check the clinic is on the foreign-patient register before you accept marketing aimed at foreign patients.
Prepaid packages are the highest-risk structure — most refusals in the data involved package or prepaid arrangements, and 61 refusals came before any treatment was given.
Common questions
Can I get a refund from a Korean clinic if I signed a no-refund form?
Signing one does not settle the question. Article 689(1) of the Civil Act lets either party to a mandate contract terminate at any time, and a clause removing that right is treated as void under Article 9(1) or 9(4) of the Act on the Regulation of Terms and Conditions. The Consumer Dispute Settlement Commission has ruled accordingly. This is the position of Korea’s consumer redress bodies, not legal advice on your own contract.
What is the most common complaint against Korean cosmetic clinics?
Contract disputes, not medical ones. In the Korea Consumer Agency’s analysis of 322 redress applications from 2019–2020, 163 (50.6%) were contract-related against 124 (38.5%) for adverse effects. Within the contract cases, 97 were refusals to refund a prepayment, and 61 of those refusals came before the procedure had even started.
Which procedures generate the most complaints?
Among the 147 applications involving adverse effects or insufficient results, eye surgery led with 34 cases (23.1%), followed by facial laser at 28 (19.0%) and nose surgery at 15 (10.2%). These are counts of filed complaints, not rates of harm — they do not tell you how often a treatment succeeds.
Are Korean clinics allowed to advertise to foreign patients?
Only if they are registered to treat them. Article 56(2)12 of the Medical Service Act prohibits domestic advertising aimed at attracting foreign patients from clinics without that registration. In the agency’s advertising monitoring, 19 of 92 suspect advertisements (20.7%) fell into this category. Registration is checkable before you book.
The Clinic Notes — verified, source-cited information on cosmetic medicine in South Korea. We accept no payments or benefits from clinics, hospitals, doctors, or referral agencies.
Revision note: This article replaces an earlier version that listed seven recurring complaints without identifying the source of the pattern. It is now built on the Korea Consumer Agency’s published analysis, and states only what that analysis supports.
Sources: Korea Consumer Agency, Consumer Damage Related to Cosmetic and Aesthetic Medical Services (미용‧성형 의료서비스 관련 소비자피해 많아), press release of 25 May 2021, 14pp, including annexed tables 1–4 — read in full, 13 August 2026. Statutory provisions as cited therein: Civil Act Article 689(1); Act on the Regulation of Terms and Conditions Article 9(1) and 9(4); Medical Service Act Article 56(2), items 2, 8, 9, 12 and 14. Figures for 2022–2025 Q1 are reported from secondary coverage of a later Korea Consumer Agency alert and are not verified against the original.
We read 122 English-language reviews of eight Seoul skin and aesthetic clinics. Not one of them said how long the result lasted. Not one mentioned a consent form. Not one mentioned anaesthesia, a refund, or the doctor’s specialty. What these reviews leave out is more informative than what they contain — and there is a documented reason for it.
This is the first in a series in which we treat clinic reviews as data rather than as opinion. We do not host reviews and we do not rank clinics. We count what is there, we count what is not, and we publish the base every time.
What we did
On 7 August 2026 we collected every English-language review visible to us on Google Maps for eight clinics in Gangnam, Apgujeong and Hongdae, taking both the default sort order and the lowest-rating sort order. That produced 122 reviews: 52 at five stars, 13 at four, three at three, one at two, and 53 at one.
It is not a random sample and we will not pretend otherwise. Google stops paginating after roughly eight to ten reviews per sort order — one clinic in our set displays 1,506 reviews and showed us eight. Of the 122 we did read, 102 were truncated by Google at around 240 characters, so anything mentioned in the tail of a review is invisible to us. Every count below is a floor, not a measurement.
What was missing
What we looked for
Reviews mentioning it
How long the result lasted
0
A consent form or any paperwork
0
Anaesthesia
0
A prepaid package or course of treatments
0
A refund, or compensation of any kind
0
The doctor’s board certification or specialty
0
Legal recourse, insurance, or a complaint body
0
Aftercare or a follow-up visit
1
A written quote before payment
1
An actual price in Korean won
2
Base: 122 English-language Google reviews across eight Seoul clinics, collected 7 August 2026
The zeros are the finding. Lifting, fillers and botulinum toxin were the procedures most often named in this corpus, and all three are bought on the promise of a duration. Not one reviewer said whether they got it.
What was there instead
If reviewers were not describing outcomes, what were they describing? We classified the 65 positive reviews the same way.
What the positive reviews praised
Count of 65
The premises — cleanliness, decor, “luxury” feel
29
Staff warmth and friendliness
20
A clear explanation of the procedure
11
A named individual member of staff
11
Satisfaction with the result
8
Transparent pricing
6
An interpreter or English-speaking staff
3
Not being pushed to buy more
2
Base: the 65 reviews rated four or five stars, from the same corpus
Twenty-nine reviewers praised the room. Eight praised the outcome. Complications appear four times in the negative reviews and never once in the positive ones, which is what you would expect if the positive reviews were written before any complication could have appeared.
The axis of evaluation has moved. These are not reviews of medical care. They are reviews of an afternoon.
“They didn’t push me” is a compliment
Thirteen of the 57 negative reviews describe being sold additional treatments — in two cases, being moved into a treatment room without being told what was about to happen. Against that, two positive reviews single out the absence of selling as the thing worth writing down.
They did not try to upsell me at all, just listened to my needs and recommended the best…
Google review, Reberry Gangnam, 5 stars, July 2026
The pricing is honest and transparent — no hidden fees or pushy upsells.
Google review, Cellin Hongdae, 5 stars, April 2026
A market in which not being sold to is remarkable enough to record is a market in which being sold to is the default.
Who does the selling is its own finding. Across the corpus, the person conducting the consultation is called a consultant, a counsellor, a receptionist, a “foreign manager” or, flatly, “sales people”. Only two reviews state how long the patient spent with a doctor.
I spent over two hours with counselor but I had maximum three minutes with Dr. Lee.
Google review, Banobagi, 1 star
To start with I had only 5 min consultation then they rushed me out to serve next person.
Google review, ID Hospital, 1 star
Why the reviews stop at the door
Two reviews, written by different people about different clinics, describe the same mechanism.
They give you free gifts in exchange for a 5 star review. They ask you to post it during the consultation. Then they check the review before giving your gift. So beware the ratings may be inflated.
Google review, MUSE Gangnam, 1 star, June 2026
The high review you see here is because they ask you to gove a five star review before you leave, so you get a gift. You have to show that you have a five star review and that you posted it.
Google review, Reberry Gangnam, 1 star, July 2026
Neither is a copy of the other. The phrasing differs, the spelling differs, and one contains a typo the other does not. Both describe the same four steps: the request arrives during or before the procedure, the rating is specified, the posting is verified, and only then is the gift handed over.
If a review is written inside the clinic on the day of treatment, it can only ever describe that day. That is the entire explanation for the first table in this article. There is no duration in these reviews because there was no duration yet.
A regulator has already documented this
Two reviews are two reviews. But in July 2026 Korea’s Fair Trade Commission issued corrective orders against three Seoul plastic-surgery clinics for the same practice, and the published account of the case describes the mechanics in more detail than any patient could.
The clinics recruited patients as promotional models through their own websites, discounted the surgery in exchange, and then sent instructions by messenger: a specified minimum character count, before-and-after photographs required, and a post once a month for a year after surgery. At least one required a deposit of 500,000 won, returned on compliance.
The finding worth carrying is not the sanction. It is the principle. A review written by a real patient about a real operation is still deceptive advertising if it was compensated and the compensation was not disclosed. Authenticity is not the test. Disclosure is.
No fine was imposed — the outcome was a corrective order. For comparison, the equivalent United States rule, in force since October 2024, carries a maximum civil penalty above fifty thousand dollars per violation.
The only two prices in 122 reviews
Exactly two reviews in the corpus contain a figure in Korean won. One of them is a four-star review, and the reviewer is not complaining.
The price in store was 88,000 won if you bring your Korean ARC card. If you don’t have one they’ll charge you 97,000.
Google review, MUSE Gangnam, 4 stars, June 2026
An alien registration card is what a foreign resident of Korea carries. A visitor does not have one. The reviewer records a ten per cent difference in the same tone she uses for the rest of the visit — as a fact about the day, not as a grievance. That is the corpus in miniature: things are recorded, not evaluated.
The second figure comes from a one-star review and puts the gap far higher.
If you call a Korean call center they will tell you a completely different price it will be at least 30% cheaper than their foreign manager tells you, so be careful
Google review, VIEW Plastic Surgery, 1 star
The two figures do not agree with each other, and we are not going to pretend that two reviews establish a pattern. What we can say is that we could find no systematic measurement of what foreign patients are quoted at Korean clinics — not by a regulator, not by a researcher, not by anyone. An entire industry has been built on English-language search without that number ever being published.
What this does not prove
It does not establish that any particular clinic solicited reviews. It establishes that two patients say they were asked to, and that a regulator found three other clinics doing it.
It does not tell us what proportion of reviews are produced this way. Google shows eight per sort order; we cannot see the rest.
A five-star-heavy distribution is not by itself evidence of manipulation. Naturally occurring review distributions are already skewed, and self-selection alone produces skew. We treat that signal as weak and will deal with it properly in a separate article.
Silence is not the same as absence. A reviewer who does not mention a consent form may well have signed one.
What we could not confirm
Korean-language reviews. Naver Place, KakaoMap, Gangnam Unni and Babitalk were all unreachable to us. Everything above describes the English-language corpus only, and the comparison with Korean patients that we plan for a later article rests on a much smaller community sample.
The Fair Trade Commission decision itself. We worked from published accounts of the case, not the decision document. Reported dates for the announcement differ by a few days across outlets, which is why we date it only to July 2026.
Whether complaints skew towards English. At one clinic, the ten lowest-rated reviews were all in English. That is suggestive and nothing more; we did not read the Korean reviews.
Whether foreign patients are systematically quoted more. Two reviews in this corpus mention a gap and disagree about its size — ten per cent in one, thirty in the other. Two data points are not a finding, and we could locate no study that measures it.
Check a clinic yourself
Every signal used in this article can be checked by a reader in about two minutes: count the star breakdown you can actually see, open ten reviews and count how many come from accounts with a single review, and note whether you were offered anything in exchange for posting. We built a page that does the arithmetic and shows you what each signal is worth and where it comes from. It runs in your browser and stores nothing.
One thing has become easier very recently. Since 9 July 2026, Naver publishes each reviewer’s own average star rating — so an account whose every review is five stars is now visible to anyone looking.
Collected and verified 7 August 2026. Figures are counts of what we read, not estimates. If you find an error in this article, write to [email protected] with the specific claim and we will correct it on this page with the date and a note describing what changed.
Other notes built on this corpus
This was the first note in a series that treats Seoul clinic reviews as data. The others draw on the same corpus or on the regulatory record behind it.