Abstract
Public-interest focus. This paper examines interoperability as a means of advancing democratization of care: wider practical access, affordability, informed choice and equitable participation. Claims of benefit require evidence about who gains and who remains excluded.
Research question. How large is the economic opportunity for interoperability across healthcare and adjacent care services, and which portion could plausibly support a sustainable interoperability service? This paper separates industry expenditure, fragmented workflows, identifiable purchasing organizations and attainable platform revenue. Its central finding is methodological: a large care economy establishes relevance, but does not establish a software total addressable market.
Approach. A targeted narrative review combines official expenditure statistics, US hospital interoperability evidence, business-statistics definitions and a critical audit of the supplied provider-universe document. The analysis then develops original account-based sizing equations, scenario sensitivity, workflow selection criteria and a prospective validation program. It does not conduct a new global census or estimate a statistically representative worldwide adoption rate.
Evidence. WHO reports approximately US$9.8 trillion in global health spending for 2022. CMS reports US$5.3 trillion in US health expenditure for 2024. These are different-year, overlapping geographic aggregates and must not be added. ASTP/ONC describes substantially different rates for sometimes-or-routinely versus routinely exchanging information across all four measured domains in US hospitals.[1][2][3]
Interpretation. The supplied document's hundreds-of-millions provider universe is not a defensible buyer count. Its categories combine workers, practices and facilities, while its overlap adjustments and interoperability percentages are unsupported. Those ranges should be retained as internal hypotheses until independently reconstructed.[6]
Contribution. The proposed research program replaces a headline-driven market narrative with a measurable progression: define a buyer, verify an unmet workflow, establish legal and technical access, prove an economic benefit, and observe willingness to pay. Interoperability is valuable where it completes a useful transaction under accountable conditions. Connectivity alone is an intermediate output.
Principal conclusion: Interoperability can advance democratization of care when it reduces exclusion, makes coordination affordable and supports locally sustainable services. Market size should be evaluated separately from public benefit.
Key findings and implications
- Healthcare expenditure, service activity and attainable software revenue are different quantities.
- A provider universe must separate workers, locations, organizations and purchasing accounts.
- Public benefit should be evaluated through completed care, integration burden and participation by smaller providers.
Why this matters for democratization of care
Interoperability as shared access infrastructure
Interoperability matters to democratization when it reduces the practical costs of participating in care. A technical connection can reduce duplicate paperwork, help a receiving organization understand a referral or permit a person to move between providers without rebuilding their history. These mechanisms need outcome evidence: the existence of an API is an intermediate capability, not the social result.
Large organizations may have resources to purchase interfaces, negotiate contracts and maintain specialized staff. A system that requires the same fixed investment from a small community provider may deepen concentration. Evaluation should therefore measure the distribution of onboarding costs, maintenance burden and access terms across organizational sizes. Open specifications can help, but pricing, documentation, portability and operational support determine who can participate in practice.
Unmet need is not identical to paying demand. Public financing, cross-subsidy, community ownership and shared infrastructure may support valuable connections that cannot sustain a conventional per-user fee. A public-interest appraisal should compare these institutional options and publish who funds the service, who captures savings and whether the arrangement remains affordable after any pilot subsidy ends.
| Dimension | Proposed measure | Interpretation safeguard |
|---|---|---|
| Participation | Share of eligible small or community providers with a usable connection | Count operational connections, not directory listings |
| Access | Completed appropriate care among all eligible people | Include offline and unsuccessful journeys in the denominator |
| Cost distribution | Patient burden and provider integration cost by group | Report who pays and who receives savings |
| Contestability | Cost and time to change service or export usable records | Test actual portability, including assistance |
These measures are a proposed evaluation framework, not established findings about an existing service. Report baseline conditions, uncertainty, excluded populations and adverse results. A credible study can conclude that an intervention is useful, ineffective or inequitable; democratization is the question being tested, not a benefit assumed in advance.
Methods and evidence boundaries
The review used purposive source selection to answer three separate questions: the scale of health activity, the extent of a measured interoperability gap and the construction of a commercial buyer denominator. Official statistics were prioritized for expenditure and business-unit definitions. The supplied planning PDF was treated as an object of audit rather than independent corroboration. No new provider census was performed.
A claim was retained as an empirical baseline only when its source, unit and observation period were identifiable. Scenario inputs were kept separate from those baselines. Arithmetic was checked directly, while external datasets were not independently reconstructed. The analysis uses dimensional consistency as a validity test: people, organizations, transactions and dollars cannot be summed or exchanged without an explicit mapping.
This is an AI-assisted, targeted research working paper, not an independently peer-reviewed study. Proposed models and interventions are not evidence of deployed capabilities or measured outcomes. The full PDF contains the detailed analysis, assumptions and limitations.
References and source notes
Reference numbers match the PDF. Public sources are linked below; preliminary supplied planning materials are identified as such and do not constitute independent verification.
- World Health Organization. Global spending on health: Emerging from the pandemic. 2024; observations through 2022. Official report. ISBN 978-92-4-010449-5. Global expenditure baseline; not a software-market estimate.Read the source
- Centers for Medicare & Medicaid Services. National Health Expenditure Data: NHE Fact Sheet. 2024 historical expenditure series; retrieved for 2026 review. Official statistical summary. Dollar values are nominal US dollars and the geography is the United States.Read the source
- ASTP/Office of the National Coordinator for Health Information Technology. Interoperable Exchange of Patient Health Information Among U.S. Hospitals: 2023. 2024 publication; 2023 survey observations. Official survey-based descriptive brief. Universe: US nonfederal acute care hospitals; not all providers or countries.Read the source
- US Census Bureau. County Business Patterns: About this Program. Program documentation, accessed for 2026 review. Primary statistical-method documentation. Employer establishments; this series did not extract a new establishment count.Read the source
- US Census Bureau. Nonemployer Statistics: About this Program. Program documentation, accessed for 2026 review. Primary statistical-method documentation. Nonemployer business units require separate treatment from employer establishments.Read the source
- User-supplied Careverse™ planning document. Global Interoperability Opportunity by Provider Universe 1(3).pdf. Undated; supplied source reviewed October 2026. Internal seven-page planning source. No supporting citations or reproducible count methodology identified. Quoted ranges are unverified hypotheses, not external evidence.
- Careverse™ internal research revision. The mathematics of a universe of care. September 14, 2026; 19 pages. Retrieved source: Careverse_Care_Flow_Math_Research_Revision(2).pdf. Pages 2 and 16-17 present the 1.56 sextillion scenario. Planning inputs and unconstrained combinations, not validated market demand.
- National Uniform Claim Committee. Health Care Provider Taxonomy Code Set, version 26.1. July 1, 2026; downloaded October 2, 2026. Audit of the downloaded CSV: 883 data rows and 883 unique Code values. Count does not imply independent provider categories or a global care-sector classification.Read the source