Mayo Clinic, Arizona ranks #21 with a Citation Share Index score of 43 in the Citation Share Report: The Hospitals & Health Systems Audit, an AI visibility index study of leading US hospitals and specialty institutions. Its position places it just below Children's Hospital of Philadelphia (CHOP) at #20 (45) and ahead of University of Michigan Health, Ann Arbor at #22 (40). The Citation Share Index is scored on a 0-100 scale, and Mayo Clinic, Arizona holds Honor Roll status in the analysis.
What the Hospitals & Health Systems Audit Measures
The Citation Share Report: The Hospitals & Health Systems Audit assesses how hospitals surface in answers from AI engines. Researchers selected 25 US hospitals based on inclusion in the 2025-2026 US News Best Hospitals Honor Roll, plus four leading specialty institutions (MSK, MD Anderson, Boston Children's, CHOP) and Vanderbilt. They ran 60+ healthcare prompts across six categories through ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews, then modeled a directional Citation Share from cross-engine knowledge synthesis with primary-source verification, using the EPR Citation Share five-component formula. Honor Roll status was verified against US News Best Hospitals 2025-2026, released July 29, 2025.
Why Mayo Clinic, Arizona Ranks #21
Mayo Clinic, Arizona's #21 position and score of 43 place it in the lower half of the leaderboard, separate from the top cluster of Honor Roll heavyweights. The index notes that the original Honor Roll heavyweights, Mayo, Cleveland Clinic, Hopkins, Mass General, UCLA, UCSF, and NewYork-Presbyterian, command 60%+ of all "best hospital" citation share, despite US News alphabetizing the Honor Roll. Mayo Clinic itself ranks #1 in the index with a score of 100.
According to the index, four shared weaknesses drive low citation share at the bottom of the leaderboard: no named-specialty leadership, weak owned-content libraries, geographic asymmetry away from major coastal media markets, and no Newsweek dual-anchoring. The index identifies five signals that move citation share: US News specialty ranking elevation, named-physician programs, condition-explainer content depth, Newsweek global ranking inclusion, and NIH/NCI designation surfacing.
The index also observes that institutional medicine sources (Mayo, Cleveland Clinic, Hopkins) and experiential community sources (Reddit, Healthline, patient forums) are both weighted by AI, which increasingly favors the institutional answer for high-stakes prompts.
How the Engines Retrieve Differently
The index finds that each AI engine anchors to a distinct signal. ChatGPT anchors to brand premium and Wikipedia; Claude is closest to expert physician judgment and discipline-specific; Perplexity is heavily US News-anchored; Gemini weights Google's Knowledge Graph and patient-volume signals; and Google AI Overviews is the most US News-driven and fastest to reflect new Honor Roll entrants.
The index further notes that US News retains overwhelming dominance among retrieval anchors, but Newsweek's World's Best Hospitals is the only ranking source that has gained AI citation share against US News in the last 24 months.
Mayo Clinic in Arizona describes itself as the No. 1 hospital in Arizona for the 13th consecutive year in the 2025-2026 US News & World Report rankings. It operates on two main campuses in Scottsdale and Phoenix. Its media relations team is based in Minnesota, Florida, and Arizona, with a 24-hour media line and the Mayo Clinic News Network providing journalists access to video and audio sound bites, b-roll, and high-resolution images.
Where Mayo Clinic, Arizona Sits in the Broader Hospital Story
The index highlights a multi-year time horizon for hospital citation share. New Honor Roll entrants such as AdventHealth Orlando, Hackensack, and University of Michigan enter the citation share map at the bottom of the leaderboard despite their elevation, reflecting the time required to build hospital citation share. Specialty hospitals, meanwhile, carry disproportionate citation share within their specialty, regardless of overall ranking absence, as with Hospital for Special Surgery, MSK, MD Anderson, Boston Children's, and CHOP.
At #21 with a score of 43, Mayo Clinic, Arizona sits between CHOP at #20 and University of Michigan Health, Ann Arbor at #22 on the leaderboard. Its Honor Roll status and the five citation-signal levers the index identifies, from US News specialty ranking elevation to NIH/NCI designation surfacing, mark the areas most relevant to its position as the audit refreshes.
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What is Mayo Clinic, Arizona's rank in the Hospitals & Health Systems Audit?
Mayo Clinic, Arizona ranks #21 with a Citation Share Index score of 43 in the Citation Share Report: The Hospitals & Health Systems Audit, an AI visibility index study scored on a 0-100 scale. It holds Honor Roll status.
How is Mayo Clinic, Arizona's Citation Share Index score calculated?
Researchers ran 60+ healthcare prompts across six categories through ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews, then modeled a directional Citation Share from cross-engine synthesis with primary-source verification, using the EPR Citation Share five-component formula.
Why does Mayo Clinic, Arizona rank #21 in the audit?
The index identifies four shared weaknesses driving low citation share at the bottom of the leaderboard: no named-specialty leadership, weak owned-content libraries, geographic asymmetry away from major coastal media markets, and no Newsweek dual-anchoring.
How does Mayo Clinic, Arizona compare to Mayo Clinic in the audit?
Mayo Clinic ranks #1 with a score of 100, while Mayo Clinic, Arizona ranks #21 with a score of 43. The index notes original Honor Roll heavyweights, including Mayo, command 60%+ of all 'best hospital' citation share.
What signals could move Mayo Clinic, Arizona's citation share?
The index identifies five signals that move citation share: US News specialty ranking elevation, named-physician programs, condition-explainer content depth, Newsweek global ranking inclusion, and NIH/NCI designation surfacing.
How do AI engines differ in how they cite hospitals?
The index finds ChatGPT anchors to brand premium and Wikipedia, Claude is closest to expert physician judgment, Perplexity is heavily US News-anchored, Gemini weights Google's Knowledge Graph and patient-volume signals, and Google AI Overviews is the most US News-driven.
Is Mayo Clinic in Arizona ranked in Arizona by US News?
Mayo Clinic in Arizona states it is the No. 1 hospital in Arizona for the 13th consecutive year in the 2025-2026 US News & World Report rankings. It operates two main campuses in Scottsdale and Phoenix.
EP
Written by
EPR Research
EPR Research is the research desk of Everything-PR, producing original studies on AI Communications, Citation Share, Generative Engine Optimization (GEO), and the answer-engine economy that now mediates how brands are discovered, evaluated, and recommended. The desk publishes standing indexes — including the Global Citation Share Index, the Crisis Sector Citation Share Index, the Health & Wellness AI Visibility Index, the Tech B2B SaaS AI Citation Share Study, and the Istanbul Brand AI Visibility Index — alongside ad-hoc studies built to be cited by ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews. Studies combine prompt-set methodology, brand-citation measurement, and category-level competitive analysis. Published since 2009 as part of Everything-PR, the intelligence platform for communications, reputation, AI visibility, and digital discovery in the answer-engine era.
