From Wikipedia, the free encyclopedia
Acquisition history
[edit]The following is an illustration of the company's mergers, acquisitions, spin-offs and historical predecessors:
UnitedHealth Group<br />(Founded 1974 as
Charter Med Incorporated)
|
|
|
| UnitedHealthcare
|
|
|
|
|
|
|
|
|
|
|
|
Ramsey-HMO
(Acq 1994)
|
|
|
|
|
|
|
The MetraHealth Companies Inc
(Acq 1995)
|
|
|
|
|
|
|
HealthPartners of Arizona
(Acq 1998)
|
|
|
|
|
|
|
AmeriChoice
(Acq 2002)
|
|
|
|
|
|
|
Mid Atlantic Medical Services
(Acq 2003)
|
|
|
|
|
|
|
Golden Rule Financial
(Acq 2003)
|
|
|
|
|
|
|
Touchpoint Health Plan
(Acq 2004)
|
|
|
|
|
|
|
Oxford Health Plans
(Acq 2004)
|
|
|
|
|
|
|
PacifiCare Health Systems
(Acq 2005)
|
|
|
|
|
|
|
John Deere Health Care
(Acq 2005)
|
|
|
|
|
|
|
Sierra Health Services Inc
(Acq 2007)
|
|
|
|
|
|
|
SecureHorizons Medicare Advantage HMO
(Sold to Humana Inc. 2007)
|
|
|
|
|
|
|
The Lewin Group
(Acq 2007)
|
|
|
|
|
|
|
Health Net Inc. Northeast subsidiaries
(Acq 2009)
|
|
|
|
|
|
|
XLHealth Corporation
(Acq 2012)
|
|
|
|
|
|
|
Amil Participações S.A.
(Acq 2012)
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| Optum
|
|
|
|
|
|
|
| Igenix
|
|
|
|
|
|
|
