Other than common elements of a single fee schedule, flow of at least 75 percent of business through the group, a standard fringe benefits plan, central payables and payroll system, and risk sharing on managed care, physicians in a GPWW may operate their practices quite autonomously.
The employer/employee relationship of the GPWW provides very powerful advantages of this model over the other models in figure 1.
(+.)Four Alliances (1993-95): IPA, PRO, MSO, Foundation; Two Loose Alliances (1993-95): IPA, PHO; Two Tight Alliances (1993-95): MSO, Foundation; Five Tight Alliances (1994-95): MSO, Foundation, GPWW
, Equity, ISM.
The AHA (1998) defines an "equity model" as an arrangement that "allows established practitioners to become shareholders in a professional corporation in exchange for tangible and intangible assets of their existing practices." Finally, GPWWs
also combine physicians into a single entity.