What Was Measured?

The number of years California’s largest HMOs have offered commercial, MediCal, and Medicare HMO product lines. HMOs are not ranked on years in business by type of insurance because it is not a quality measure.

Why Is It Important?

Enrollees may feel more comfortable in one HMO than another depending on the range of covered services, the perceived stability of the HMO, or the availability of different types of physicians who best meet their needs. The HMO’s years in business by type of insurance is one indication of healthplan stability that may influence how Californians select their HMO.

What Was the Source?

Data voluntarily reported by California HMOs to the National Committee for Quality Assurance (NCQA) and made available through NCQA’s Quality Compass®.

The HMO/POS Years in Business by Type of Insurance data comes from NCQA’s 2011 Quality Compass®, and is part of the same HMO data set used to generate the HEDIS and CAHPS quality information found in the healthplan section of the 2012 OPA Report Card.

Years in Business by Type of Insurance


HMO Commercial

HMO Medicaid

HMO Medicare

Aetna Health of California, Inc. 25  10 
Anthem Blue Cross - HMO 20  11  13 
Blue Shield of California - HMO 17  10 
Health Net of California, Inc. 28  15  15 
Kaiser Permanente - Northern California 57  27  13 
Kaiser Permanente - Southern California 62  30  20 
UnitedHealthcare of California (formerly PacifiCare) 31  31 
Western Health Advantage 10