Guide · Korea
Generative Engine Optimization for Healthcare in Korea
Why AI-search visibility for Korean clinics behaves differently: Korean-language local queries, Naver's role, per-engine grounding, and how share of voice is measured under medical advertising rules.
The question is Korean, and it is local
Korean patients do not ask “best dentist in Korea”. They ask “동탄 치과 추천” — a neighbourhood plus a specialty, sometimes a symptom. Neighbourhood granularity matters more than it does in English markets: a district name can cover two hundred clinics while the sub-district a patient actually searches covers twenty. Measuring at the wrong granularity produces a number that looks bad for reasons unrelated to the clinic.
Engines disagree, sharply
Across our measurements the same clinic in the same round is regularly named by one engine in most answers and by another in none. Engines ground on different indexes and weigh Korean local sources differently. Any single “AI visibility score” for a Korean clinic conceals this, and the concealed part is usually the one worth fixing.
Share of voice, not rank
There is no position to buy inside a generated answer. What can be counted is how often a clinic is named across a frozen question set, and which competitors are named beside it. That relative view also separates a clinic-specific change from a market-wide one — when an engine changes how it grounds, every clinic in the neighbourhood moves together.
Medical advertising rules shape what can be said
Korean medical advertising law restricts superlative claims, comparative advertising between clinics, and testimonial-style content. That rules out the “we will make you number one” framing common elsewhere, and it also shapes the content that can legitimately be published on a clinic site. Measurement-first positioning is not only more honest here — it is the version that stays compliant.
FAQ
Is GEO for healthcare different in Korea?
The mechanics are the same but the inputs are not. Patient questions are in Korean and highly local (neighbourhood plus specialty), Naver holds a large share of the local information layer that engines read, and medical advertising rules constrain what a clinic may claim. A method built for English-language markets transfers only partially.
What is share of voice in AI search?
Across a fixed set of patient questions, how often your clinic is named compared with the other clinics that appear in the same answers. Unlike a rank position it is inherently relative — it tells you how much of the answer space in your neighbourhood you occupy.
Do the engines behave differently in Korea?
Yes, and the gap is large. In our measurements a Korean clinic can be cited heavily by one engine and never by another in the same round, because the engines ground on different indexes and treat Korean local sources differently.
Does Naver matter for AI visibility?
Naver is where much Korean local health information lives, so it influences what engines can find. It is not a substitute for a clinic's own site: in our data, engines that cite a clinic's own pages are the ones where that clinic tends to be named.
Can a clinic rank first in AI answers?
There is no ranking to buy or guarantee, and Korean medical advertising rules restrict superlative and comparative claims about clinics. What can be done honestly is to measure current visibility, improve the underlying evidence, and re-measure with the same method.
Boily is a Korea-specific service: Korean-language patient question sets, four engines measured every two weeks, competitor share of voice in the same report, and our own numbers published openly. No ranking or exposure is guaranteed.