Conducted by a team led by Jeff Goldsmith, the premise of the analysis was that any examination of the role that hospitals play in health care cost growth is complicated by the fact that in most large markets, the significant hospitals are part of larger, multi-divisional health enterprises.
The report offers sobering information:
There is little evidence that integrating hospital and physician care has helped to promote quality or reduce costs. Indeed, there is growing evidence that hospital-physician integration has raised physician costs, hospital prices and per capita medical care spending. Similarly, hospital integration into health plan operations and capitated contracting was not associated either with clinical efficiency (e.g. shorter lengths of stay) or financial efficiency (e.g. lower charges per admission).
From the provider perspective, the available evidence suggests that the more providers invest in IDN development, the lower their operating margins and return on capital. Diversification into more businesses is associated with negative operating performance. This is consistent with the management literature, which shows that diversification increases a firm’s size and complexity, in turn increasing its cost of coordination, information processing, and governance/monitoring.
Moreover, there are few or no scope economies within health plans, hospitals, or physician groups — let alone between these lines of business contained within IDNs. Provider-sponsored insurance plans face similar problems regardless of whether they were formed by hospitals or physician groups: poor capitalization, lack of actuarial and underwriting expertise, limited marketing capability both to employers and consumers, adverse selection risk, and an inability to reach minimum sufficient scale of enrollment.
Despite more than 30 years of public policy advocacy on behalf of IDN formation, there is scant evidence in the literature either of measurable societal benefits from IDNs or of any comparative advantage accruing to providers themselves from forming IDNs. We have similarly found no such evidence in our analysis of 15 IDNs. Serious data limitations hamper anyone attempting to evaluate IDN performance based on publicly disclosed information. IDN financial disclosures obscure the operating performance of their hospitals and physician groups.
There does not appear to be a relationship between hospital market concentration and IDN operating profit. However, if the performance of the IDN’s flagship hospital is any indicator of overall systemic efficiency, the IDNs’ flagship hospital services appear to be more expensive, both on a cost-per-case and on a total-cost-of-care basis, than the services of its most significant in-market competitor. This runs counter to the theoretical claim of IDN operating efficiency. Further, the flagship facilities of IDNs operating health plans or having significant capitated revenues are more expensive per case (Medicare case-mix adjusted) than their in-market competitors.
Download a copy of the report, Integrated Delivery Networks: In Search of Benefits and Market Effects, here.