Twelve health systems just pooled their AI governance practices and said they care for nearly 20 million patients a year. Here is every one of the 636 health systems in the country, and how much of American hospital care those twelve can actually see.
Advocate Health, Cedars-Sinai, Hartford HealthCare, Houston Methodist, Mercy, Mount Sinai, Northwell, Northwestern Medicine, Sutter Health, UF Health, University Hospitals and WellSpan announced a Diagnostic AI Consortium this week. The deliverable that matters is the third one: shared implementation and governance practices any health system can adopt.
Governance practices are only as good as the care they were derived from. So: what does this cohort see?
Every health system in AHRQ’s 2023 Compendium, positioned by total staffed beds and by how much of that capacity sits in hospitals with fewer than 100 beds. Circle area is annual inpatient discharges. The twelve consortium members are in red.
Leave the slider at zero and the field looks like it has a clean story: bigger systems concentrate care in bigger hospitals. That correlation is mostly an artifact. Roughly two hundred “systems” in the Compendium are a single hospital under 100 beds, so they pin at 100% by construction. Drag the minimum past 300 beds and watch r collapse toward zero. The trend was the definition, not a finding. Every benchmark you are handed has one of these in it.
The consortium’s value is that twelve buyers can now compare the same vendor claim against their own data. That only generalizes to hospitals that look like theirs. Pick an archetype and watch the coverage number move.
Twelve competitors holding the same comparative data is a real change. Twelve competitors who between them touch 1.5% of the beds in America’s safety-net teaching hospitals is also true, and it is the sentence a vendor will eventually quote back at them.
“Nearly 20 million patients annually” is the consortium’s own figure and it is not the same unit as anything here. It is a patients-served count spanning ambulatory, ED and inpatient care across the members’ full footprints. AHRQ’s Compendium counts staffed beds and inpatient discharges at hospitals it can link to a system — 2.12 million discharges for these twelve, 6.6% of the 32.2 million in the file. Both can be right. Only one of them tells you what a validation cohort would contain.
Three other things worth holding onto. The Compendium vintage is 2023, so recent affiliation changes are not in it. Sixteen of the consortium’s 216 linked hospitals report no bed count and drop out of the archetype panel. And the AHRQ system boundary is not the consortium’s boundary — “Advocate Health” here is the post-merger Advocate/Atrium entity, which is why it lands where it does.
If your evidence packet is going to be graded by this cohort, it will be graded against large, mostly-urban, mostly-academic inpatient care. That is a real bar and it is also a narrow one. The follow-up question a buyer outside the twelve should ask you — and the one you should answer before they do — is what happened at the 5,000-odd hospitals under 300 beds that nobody in the room operates.