Existing law, the Knox-Keene Health Care Service Plan Act of 1975, provides for the licensure and regulation of health care service plans by the Department of Managed Health Care, and makes a willful violation of the act a crime. Existing law provides for the regulation of health insurers by the Department of Insurance. Existing law generally authorizes a health care service plan or health insurer to use prior authorization and other utilization review or utilization management functions, under which a licensed physician or a licensed health care professional who is competent to evaluate specific clinical issues may approve, modify, delay, or deny requests for health care services based on medical necessity. Existing law requires a health care service plan or health insurer, including those plans or insurers that delegate utilization review or utilization management functions to medical groups, independent practice associations, or to other contracting providers, to comply with specified requirements and limitations on their utilization review or utilization management functions.