Brigham and Women's Hospital ranks #14 with a Citation Share Index score of 60 in the Citation Share Report: The Hospitals & Health Systems Audit, an AI visibility index measuring how hospitals surface across leading AI answer engines. The Boston hospital, which holds 2025-2026 US News Best Hospitals Honor Roll status in the study, sits in the middle of a 25-institution leaderboard led by Mayo Clinic at #1 with a score of 100.
What the Citation Share Report Measures
The Citation Share Report: The Hospitals & Health Systems Audit examined 25 US hospitals selected based on inclusion in the 2025-2026 US News Best Hospitals Honor Roll, plus four leading specialty institutions (Memorial Sloan Kettering, MD Anderson, Boston Children's, CHOP) and Vanderbilt. Researchers ran more than 60 healthcare prompts across six categories through ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews, and 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 Brigham and Women's Ranks #14
Brigham and Women's Hospital earned a Citation Share Index score of 60, placing it at #14 among the 25 institutions in the study. Its position sits between Northwestern Memorial at #13 (62) and the Hospital of the University of Pennsylvania at #15 (58). The hospital's inclusion in the study was anchored by its 2025-2026 US News Best Hospitals Honor Roll status.
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. It also identifies four shared weaknesses that 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.
At #14, Brigham and Women's ranks below the group the index describes as the original Honor Roll heavyweights: Mayo, Cleveland Clinic, Hopkins, Mass General, UCLA, UCSF, and NewYork-Presbyterian. According to the index, that group commands more than 60% of all "best hospital" citation share, despite US News alphabetizing the Honor Roll.
How AI Engines Anchor Citation Share
The index finds that each AI engine anchors to a distinct set of signals. ChatGPT anchors to brand premium and Wikipedia. Claude is closest to expert physician judgment and discipline-specific sources. Perplexity is heavily US News-anchored. Gemini weights Google's Knowledge Graph and patient-volume signals. Google AI Overviews is the most US News-driven and the fastest to reflect new Honor Roll entrants.
The index also notes that US News retains overwhelming dominance among retrieval anchors, but that 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. Among the five signals the index says move citation share, both US News specialty ranking elevation and Newsweek global ranking inclusion are tied to these ranking anchors.
The index further observes that institutional medicine sources, citing Mayo, Cleveland Clinic, and Hopkins, and experiential community sources such as Reddit, Healthline, and patient forums are both weighted by AI, which increasingly favors the institutional answer for high-stakes prompts.
Where Brigham and Women's Sits in the Broader Hospitals Story
The index observes that specialty hospitals carry disproportionate citation share within their specialty, regardless of overall ranking absence, citing Hospital for Special Surgery, Memorial Sloan Kettering, MD Anderson, Boston Children's, and CHOP as examples. This pattern helps explain why specialty and named-physician strength, one of the five signals the index says move citation share, can matter as much as an institution's overall position.
Brigham and Women's Hospital publicly maintains centers of excellence spanning cancer, heart and vascular care, lung care, neurosciences, orthopaedics and arthritis, primary care, and women's health. It describes itself as a premier teaching hospital of Harvard Medical School with more than 790 beds and states that its research mission is to accelerate discoveries that improve human health. The hospital is recognized as a top hospital in the nation by US News and World Report for 2025-2026.
At a Citation Share Index score of 60, Brigham and Women's holds a mid-leaderboard position in the Citation Share Report: The Hospitals & Health Systems Audit. Its Honor Roll status keeps it inside the study's core group, and the five signals the index identifies map directly to the levers, specialty ranking elevation, named-physician programs, content depth, Newsweek inclusion, and NIH/NCI surfacing, that could shape its citation share heading into the next refresh.
Work with Everything-PR
Have a question about this research, or want to discuss your brand's coverage? Get in touch with our team.
What is Brigham and Women's's rank in the Citation Share Report: The Hospitals & Health Systems Audit?
Brigham and Women's Hospital ranks #14 with a Citation Share Index score of 60 in the Citation Share Report: The Hospitals & Health Systems Audit, an AI visibility index of 25 US hospitals led by Mayo Clinic at #1 with a score of 100.
How is Brigham and Women's's Citation Share Index score calculated?
Researchers ran more than 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.
Why does Brigham and Women's rank #14?
Brigham and Women's scored 60, placing it mid-leaderboard between Northwestern Memorial at #13 and the Hospital of the University of Pennsylvania at #15. Its inclusion was anchored by 2025-2026 US News Best Hospitals Honor Roll status.
How does Brigham and Women's compare to Massachusetts General in the index?
Brigham and Women's ranks #14 with a score of 60, while Massachusetts General ranks #4 with a score of 87 in the Citation Share Report: The Hospitals & Health Systems Audit.
What signals move a hospital's citation share according to the index?
The index identifies five signals: US News specialty ranking elevation, named-physician programs, condition-explainer content depth, Newsweek global ranking inclusion, and NIH/NCI designation surfacing.
Which AI engines were used in the Citation Share Report: The Hospitals & Health Systems Audit?
The study ran healthcare prompts through ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews. The index found each engine anchors differently, with Perplexity heavily US News-anchored and ChatGPT anchoring to brand premium and Wikipedia.
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.
