California Code, Health and Safety Code - HSC § 1317.5

(a) All alleged violations of this article and the regulations adopted hereunder shall be investigated by the state department. The state department, with the agreement of the local EMS agency, may refer violations of this article to the local EMS agency for investigation. The investigation shall be conducted pursuant to procedures established by the state department and shall be completed no later than 60 days after the report of apparent violation is received by the state department.

(b) At the conclusion of its investigation, the state department or the local EMS agency shall refer any alleged violation by a physician to the Medical Board of California unless it is determined that the complaint is without a reasonable basis.