Editing Preferred provider organization (section)

== History ==
In 1980, an early PPO was organized in Denver at [[St. Luke's Medical Center (Denver)|St. Luke's Medical Center]] at the suggestion of Samuel Jenkins,<ref name="Katz">{{Cite journal|last=Katz|first=Cheryl|date=June 1983|title=Preferred provider organizations|journal=Postgraduate Medicine|volume=73|issue=6|pages=143–146|doi=10.1080/00325481.1983.11697868|pmid=6856523|issn=0032-5481}}</ref> an employee of the [[The Segal Group|Segal Group]] who consulted with hospitals for [[Taft–Hartley Act|Taft-Hartley]] trust funds.<ref>{{Cite book|url=https://books.google.com/books?id=1OzvaySLgVAC|title=Managed Care: What It Is and How It Works|last=Kongstvedt|first=Peter|date=2009-10-07|publisher=Jones & Bartlett Learning|isbn=9780763759117}}</ref>{{Rp|6}} By 1982, 40 plans were counted and by 1983 variations such as the exclusive provider organization had arisen.<ref name="Katz" /> In the 1980s, PPOs spread in cities in the [[Western United States]], particularly California due to favorable state laws.<ref name="Katz" />