In the Journal of Health, Organisation and Management, Daniel F. Fahey suggests that Gaia theory may explain the rise and fall of publicly-traded physician practice management companies (abstract here, yours for a mere $24.62).

The short history of publicly-traded practice management companies
suggests that they had limited value and utility in the US healthcare
industry. It is the premise of the paper that the sudden appearance
these for-profit companies upset the natural order within the
healthcare industry and created a disequilibria which ultimately
resulted in their demise. While Gaia theory is most commonly applied to
the natural sciences, it has been applied to a number of
interdisciplinary issues.

Gaia theory (an hypothesis, really) suggests that life as a whole fosters and maintains suitable conditions for itself by helping to create an environment on Earth suitable for its continuity. Thus, the U.S. health care industry evolves in such a way that stakeholders manipulate the environment to suite their own needs. This strikes me as self-evident.

A more helpful model for planning or analyzing changes in health care is Herzlinger's Six Forces that impact innovations in health care.