238LAB Corp
← Gangnam Dermatology GEO Index
ISSUE 01· Hair· Measured 2026-05

Hair Transplant INDEX

Measurement prompts

60

Repetitions

6x

LLMs analyzed

6

Measured calls

2,160

Measurement Notice

This data is measured and aggregated from the responses of 6 LLMs — ChatGPT, Claude, Gemini, Perplexity, Grok, and Google AI Overview. It does not evaluate, rank, or endorse the actual quality or capability of the companies, institutions, or brands measured. It is an observational record of information visibility in the AI era.

01

Most-Cited Brand by LLM

The brand each of the 6 LLMs cited most often for Hair Transplant questions.

ChatGPT

참*터의원

55.3%

Claude

닥*포헤어

33.3%

Gemini

다*성형외과

63.1%

Perplexity

모*로의원

63.3%

Grok

모*림의원

41.1%

Google AI Overview

맥*웰피부과

28.1%

02

Hair Transplant Citation Ranking TOP 10

Citation share combined across this item's questions only. Rankings may differ from the overall ranking.

FIG 01Hair Transplant TOP 10
Brand
Citation rate
Gap

01

맥*웰피부과

15.6%

8.1

02

포*어의원

14.5%

19.5

03

참*터의원

12.7%

20.5

04

다*성형외과

11.9%

23.1

05

모*로의원

11.3%

23.3

06

모*림 성형외과

10.9%

20.3

07

모*림성형외과

10.6%

11.0

08

뉴*어의원

9.2%

12.3

09

모*림성형외과의원

8.2%

12.4

10

모*올의원

7.7%

14.9

Measured 2026-05 · 2.2K calls combined · Some brand names masked

03

Top Brand by Segment

How the top-cited brand for Hair Transplant shifts with the asker's profile (age and gender).

20s

30s

40s

50s

60+

Male

Female

Each cell shows the most-cited brand for that segment — the darker the cell, the higher the citation rate. Click a cell to switch the ranking below to that segment.

FIG 02-1Select a segment to see its TOP 5
Brand
Citation rate

Try clicking a cell in the heatmap above.

04

LLM × Segment Comparison

Compare each LLM's top brand while switching segment conditions.

Gender
Age

ChatGPT

참*터의원

55.3%

Claude

닥*포헤어

33.3%

Gemini

다*성형외과

63.1%

Perplexity

모*로의원

63.3%

Grok

모*림의원

41.1%

Google AI Overview

맥*웰피부과

28.1%

Each cell shows the brand each LLM cites most under the selected conditions. Change the filters to see how each LLM's top pick shifts.

05

Sample Measurement Prompts

A selection from the 60 prompts used in the actual measurement. The full prompt pool design is published in our methodology.

  • 01

    “Recommend a good place for hair transplants in Gangnam.”

  • 02

    “Recommend the top 5 clinics for hair transplants in Gangnam.”

  • 03

    “Which clinics in Gangnam offer hair transplants at reasonable prices?”

  • 04

    “Recommend a place in Gangnam for hair transplants that's effective and has real expertise.”

  • 05

    “Where in Gangnam can I safely get a hair transplant with minimal side effects?”

  • 06

    “Where in Gangnam can I get a hair transplant with good reviews?”

View the GEO Citation Report methodology →

Custom Research

Need a dedicated deep dive on Hair Transplant?

We run commissioned studies: expanded Hair Transplant prompt sets, single-brand measurement, and coverage of other items or regions.