Dental Clinic Marketing and AI Answers: Where ChatGPT, Gemini and Perplexity Find Clinics

Key takeaway: When patients ask "recommend a dentist in [district]," ChatGPT, Gemini and Perplexity answer with clinics in that area. In RanketAI's analysis of 36 answers to local dental, dermatology and plastic surgery questions on October 1, 2026, all 36 named clinics in the asked region, and the most cited sources were clinic websites and medical info and booking platforms. Each AI named different clinics: all three named the same dental clinic only 0–3 times per question. Clinics should first make their website, public registry entries and platform listings consistent, then prepare informational content within medical advertising rules.

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Three-line summary

• When the question included a region, all three AI services answered with clinics in that region — 36 of 36 answers, with one answer including a clinic from a neighboring area.
• Clinic websites and medical info and booking platforms were the most cited sources. In a small county, the local government's registry of clinics became the basis of the answers.
• Each AI named different clinics. Do not judge from a single check in one AI; repeat local questions in each AI.

When the question included a region, every answer named clinics in that region

All 36 answers RanketAI measured on October 1, 2026 named clinics in the asked region, and none misread the question as market analysis or an industry overview.

The measurement conditions were:

Item	Details
Categories	Dental clinics; dermatology and plastic surgery clinics
Regions	Gangnam-gu, Seoul (large city); Naseong-dong, Sejong (new town); Cheongyang-gun, South Chungcheong (rural county)
Questions	Two question types that include the region: representative clinics and recommendation
AI services	ChatGPT, Gemini and Perplexity, with web search
Answers	2 categories × 3 regions × 2 questions × 3 AIs = 36 (no failures)

All 36 answers picked up the asked region at the start and listed clinics there. Some answers also gave the clinic's street address or cited a local government list. One answer included a clinic from a neighboring area; its cited source listed an address in another city.

Asking without a region gave a different picture. In a 2026-09-03 observation with different wording, ChatGPT described clinic types such as "implant-focused clinics" instead of naming clinics and said a location and purpose were needed, while Gemini mostly named university dental hospitals. Because the wording and timing differ we do not compare them directly, but the direction is the same: local clinics appear in answers when the question includes a location, as patients actually ask.

Clinic websites and medical info platforms were the most cited sources

Grouping the sources attached to answers by type, clinic websites and medical info and booking platforms were cited often in all three AI services.

Source type (answers citing it, out of 12 per AI)	ChatGPT	Perplexity	Gemini
Clinic websites	7	11	11
Medical info and booking platforms	6	12	9
Public and society registries (local government, HIRA, societies)	7	5	4
Blogs and communities	3	8	0
News	1	8	1

The mix differed by AI. ChatGPT cited public registries such as local government clinic lists and the Health Insurance Review & Assessment Service relatively often. Perplexity cited platforms, blogs, communities and local news broadly. Gemini relied on clinic websites and platforms and cited no blogs or communities. Sources were widely spread: 44 distinct domains across 18 dental answers, and 59 across 18 dermatology and plastic surgery answers.

The implication for clinics is clear. When AI names a clinic, it relies on the website the clinic manages itself and on platforms and public registries where clinic information is listed. If these are empty or inconsistent, AI has little material to present the clinic with a source.

Each AI named different clinics — all three agreed on 0–3 dental clinics per question

For the same local question, the dental clinics named by all of ChatGPT, Gemini and Perplexity numbered 0–3 per question, and fewer in large cities.

Region	Representative clinics question	Recommendation question
Gangnam-gu, Seoul	1	0
Naseong-dong, Sejong	1	1
Cheongyang-gun	3	1

In an area with many dentists such as Gangnam-gu, each AI named different clinics, and the only one all three named was a university hospital's dental center. Appearing in one AI does not mean appearing in another, and the same AI does not return the same list every time. Check in each AI, with the same question repeated. The method is in How to Check If ChatGPT Mentions Your Brand: 5 Steps.

In a small county, AI followed the public registry

For Cheongyang-gun, ChatGPT listed all seven dental clinics registered on the county office's clinic list, and for dermatology and plastic surgery all three AI services said there was no specialist clinic in the county.

Where there are few clinics, AI answered factually from the local government registry. For a specialty with no clinic in the area, it said so and pointed to the public health center or primary care clinics, mentioning neighboring areas only by city name. For clinics in small areas, the accuracy of public registry entries flows directly into AI answers. In large cities, registry entries alone do not set clinics apart, so how specific the website and platform information is matters more.

Step 1: Record AI answers and sources for questions that include your area

Enter questions the way patients ask — with the area — into ChatGPT, Gemini and Perplexity, and record which clinics appear and which sources are attached.

Example questions combine area and purpose, such as "recommend a dentist in [neighborhood]" or "a good implant dentist in [district]." Enter the same question at least three times in each AI and note how many times your clinic appeared and which sources came with it.

Step 2: Sort the sources into self-managed, listings and third-party content

Sorting the recorded sources by what the clinic can do about them tells you what to fix first.

Group	Sources	What to do
Self-managed	Clinic website	Put the area, street address, specialties, doctors and opening hours in the page text. AI crawlers may not read content drawn by JavaScript — see AI crawlers and JavaScript
Listing corrections	Public registries, medical info and booking platforms	Check that the clinic name, address and specialties match across HIRA's hospital information, the local government clinic list and the platforms you use, and request corrections where they differ
Third-party content	Blogs, communities, local news	Cover informational topics such as care guidance, cost criteria and precautions. Using treatment testimonials as advertising may violate the medical advertising rules below

How to find sources that cite only competing clinics is covered in The Source Gap.

Step 3: Fix the website and listings first

Work in the order self-managed → listing corrections → third-party content. The first two are things a clinic can do immediately without outside help.

Write the location and care information on the website as page text, and make the clinic name, address and specialties in public registries and platforms match the website. Prepare third-party content as informational material after checking the medical advertising rules below.

Step 4: Check the same questions again after two weeks or more

Enter the same questions again at least two weeks later and compare clinic names and sources with your Step 1 record.

AI answers change even for the same question, so compare by how many times out of several runs your clinic appeared, not by a single change.

Prepare within medical advertising rules

Using treatment testimonials as advertising to grow blog and community sources may count as prohibited medical advertising under the Korean Medical Service Act.

"환자에 관한 치료경험담 등 소비자로 하여금 치료 효과를 오인하게 할 우려가 있는 내용의 광고" (advertisements with patient treatment testimonials or other content likely to mislead consumers about treatment effects) — Korean Medical Service Act, Article 56(2)2 (Prohibition of Medical Advertisement)

Item 11 of the same paragraph prohibits advertisements that did not undergo the required review or that differ from the reviewed content. Content made for AI visibility is subject to the same rules if it counts as advertising. Publishing factual information accurately — specialties, doctors, location, opening hours — is unaffected by these rules, and most of the information AI used as sources was of this kind. Confirm whether specific content counts as advertising with a medical advertising review body or a legal professional.

Naver AI Briefing draws on different sources

This measurement covered ChatGPT, Gemini and Perplexity. Naver's AI Briefing, shown inside Naver search results, mainly cites sources within Naver such as Naver Blog.

Given how many Korean patients search for clinics on Naver, check AI Briefing as well. How Naver's AI search works is covered in our Naver AI search overview.

Limits of this observation

These results come from a single measurement on October 1, 2026, so the size of the figures cannot be generalized.

• The sample is small. Two categories × three regions × two question types, measured once per AI. Repeating a question can change the list.
• AI services keep changing. Models and search behavior may have changed since the measurement, so the same results may not hold.
• Source types were assigned by hand. People classified the cited domains, and domains whose type could not be confirmed were left as other.
• Clinic locations were checked only against evidence in the answers. The actual locations of the named clinics were not checked against an external census.

FAQ

Related reading

• How to Check If ChatGPT Mentions Your Brand: 5 Steps — choosing questions and repeating checks
• AI Search Cannot Verify Your Business — a 71-business audit of local businesses
• Naver AI Search Explained — AI Briefing and Naver's own sources
• The Source Gap — finding sources that cite only competitors
• Why the ChatGPT App and AI Visibility Tools Disagree — comparing app and API answers to the same questions