Visibility index · United States
Clinical labs
56 AI answers to 12 prompts name 33 brands. Labcorp leads with 19.3% of mentions; the top 3 hold 43.8%.
Level 3n = 56 answers12 promptsupdated Oct 8, 2026AI Mode14ChatGPT14AI Overviews14Gemini14
AI answers
56
12 prompts
Last run Oct 8, 2026
Brands seen
33
Top 3 hold 43.8%
n = 56 answers
Concentration
Fragmented
HHI 911 · leader 19.3%
Leader
Labcorp
19.3% of mentions
Avg. position #3.0
Top engine
AI Mode
25% of answers
4 engines sampled
Sources cited
136
Top: questhealth.com 7.4%
n = 56 answers
What AI answers show
Brands and sources in the sampled answers
n = 56 answers12 promptsOct 8, 2026
Brands AI recommends
Share of brand mentions in Clinical labs answers
- 1Labcorpavg. #3.019.3%56
- 2Quest Diagnosticsavg. #2.219.3%56
- 3Walk-In Labavg. #4.75.2%15
- 4Mayo Clinic Laboratoriesavg. #3.94.8%14
- 5ARUP Laboratoriesavg. #5.04.1%12
n = 56 answers33 brands seen in total
Market concentrationFragmented
FragmentedModerateConcentrated
HHI 911Leader 19.3%Top 3 43.8%
Fragmented: no brand dominates. The top 3 hold 43.8% of mentions; the leader 19.3%.
Answers behind the ranking
Every engine sampled
- Google AI Mode14
- ChatGPT14
- AI Overviews14
- Gemini14