B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
23.3%
23.3% -- healthcare citation share for Mayo Clinic, Cleveland Clinic, Johns Hopkins combined (2026)
Mayo Clinic, Cleveland Clinic, and Johns Hopkins combined accounted for 23.3% of all healthcare citations made by AI engines in 2026.
- Based on analysis of 75-plus medical queries across 5 AI search engines
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
23.3%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Everything-PR
Primary
Tier B
https://rctrl.com/blog/aeo-healthcare-hipaa-safe-citation-strategies ↗
Source Article
AEO for Healthcare Brands: HIPAA-Safe AI Citations
Healthcare AEO is the hardest vertical in AI search, and the reason isn't the technology. It's that every other vertical can afford to be sloppy in the first draft. Healthcare cannot. Publish an unverified drug interaction claim, or a testimonial with a stray identifying detail, and the exposure is …
Original Research
Everything-PR
· Original study ↗
Methodology
Everything-PR Healthcare Citation Share Index 2026
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Mayo Clinic, Cleveland Clinic, Johns Hopkins combined: 23.3% healthcare citation share. Source: Everything-PR (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/top-three-hospitals-citation-share-2026
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<blockquote cite="https://lighthousedata.io/data/top-three-hospitals-citation-share-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>23.3%</strong> -- healthcare citation share for Mayo Clinic, Cleveland Clinic, Johns Hopkins combined<br><small>Source: Everything-PR (2026) · <a href="https://lighthousedata.io/data/top-three-hospitals-citation-share-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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