On July 27, 2023, California’s Office of Health Care Access and Information (the “Office”) released its long-awaited proposed regulations on the notice requirements for material health care transactions in California. The anticipated regulations follow the passing of SB 184 on June 30, 2022, which, in part, created the Office and granted it the authority to collect and analyze data related to health care costs, specifically via monitoring mergers and acquisitions in the health care industry. Following the lead of states like New York, whose wide-range health care transaction requirements were discussed in a previous blog post, California seeks to address the increasing costs of health care services by imposing significant notice and review requirements for mergers and acquisitions beginning in 2024.