Our history

HealthCare Partners became part of Optum in 2019 as part of Optum’s acquisition of DaVita Medical Group. Prior to joining the Optum family, HealthCare Partners had a long-standing history as one of the largest medical groups in California.

HealthCare Partners Medical Group was formed in 1992 when Los Angeles-based California Primary Physicians, Pasadena-based Huntington Medical Group, and East Los Angeles-based Universal Medi-Co joined forces. In 1996 Alliance of Private Practice Physicians became the first in our now expansive network of independent physician associations (IPAs). By the end of 1997, Bay Shores Medical Group in Redondo Beach and Memorial Medical Group in Long Beach joined the HealthCare Partners family. Unified Physicians of the South Bay followed soon afterward.

Since its founding, HealthCare Partners grew significantly, becoming one of the largest medical groups in California. Growth in the last decade was particularly noteworthy with four staff-model medical groups teaming with HealthCare Partners: Greater Valley Medical Group in the San Fernando Valley, Harriman Jones Medical Group in the Long Beach area, Arroyo Seco Medical Group in Pasadena, and Talbert Medical Group headquartered in Orange County.

In addition, HealthCare Partners’ IPA network of affiliated health care providers was strengthened by Physician Associates of the Greater San Gabriel Valley in Pasadena in 2008, Northridge Medical Group in the San Fernando Valley in 2009, and many other practices.

In November 2012, HealthCare Partners merged with DaVita, a leading provider of kidney care in the United States, and operated as a DaVita Medical Group prior to being acquired by and renamed to Optum.