In 2018, California health insurers covered 32.8 million enrollees. This quick reference guide shows enrollment by regulator, market, and insurer. Data files are also available to download.

Workers who have health insurance through their employer bear a portion of the costs for their health care. This quick reference guide presents data from the 2018 California Employer Health Benefits Survey.

California Health Insurers: Large Insurers Remain on Top provides a snapshot of the insurance market in California at the end of 2017. This Almanac report looks at market share, enrollment, financial performance, and consumer satisfaction.

The medical loss ratio (MLR) is the percentage of premium that health insurers spend on medical care and quality improvement activities. These resources include the most recent MLR database with data from 2012 to 2017, as well as documents that describe the MLR and how to use the database.

The state's county-based health plans are public entities organized through one or more counties to ensure that Medi-Cal enrollees, and in some cases county employees and Covered California enrollees, receive comprehensive care. Where are these plans and who do they cover? How have they changed between 2012 and 2018?

Medi-Cal, California’s Medicaid program, is the state’s health insurance program for Californians with low incomes, including children, persons with disabilities, seniors, and adults with low incomes. Get the latest data on this program, which covers one in three Californians.

Since the implementation of the ACA in 2014, the uninsured rate in California dropped to an all-time low of 9% in 2016. However, 2.9 million Californians remained uninsured. This Almanac report takes a look at who was uninsured in 2016.

More than half of Californians get their health insurance through private carriers. This infographic shows how the largest plans stack up in terms of enrollment and revenue.

In the '70s and '80s, California led the nation in HMO adoption. Over the past dozen years, however, the state's commercial HMO enrollment has fallen dramatically. Get the data on the dynamics of this decline.

Compared to the nation, more of California's children have public health coverage and fewer have coverage through their parents' work. This Almanac report looks at trends in children's coverage.