Note: Data updated May 3, 2019, to better reflect health plan subsidiary and parent relationships.

In 2017, California health insurers covered 33.1 million enrollees — 27.3 million were enrolled in commercial coverage or public managed care and 5.7 million were enrolled through administrative services only (ASO) arrangements for self-insured employers. Commercial enrollment consists of small group, large group, and individual enrollment.

These resources combine 2017 enrollment data from California’s two health insurance regulators, the Department of Managed Health Care (DMHC) and the California Department of Insurance (CDI). Data are available from 2012, the first year of state-mandated enrollment reporting, through 2017. Data include detail by market (e.g., individual, large group, Medi-Cal), product (e.g., HMO, PPO), regulator (DMHC and CDI), insurer (e.g., Anthem Blue Cross), and year.

The quick reference guide and data file are available for download below. These materials are part of CHCF’s California Health Care Almanac, an online clearinghouse for key data and analyses describing the state’s health care landscape. See our entire collection of current and past editions of California Health Insurers and Enrollment.