Cal. Welf. & Inst. Code § 14092.2

The director may establish policy and procedures that assure that outpatient physician’s services, and any other Medi-Cal services the director may designate, provided by a source other than the primary care provider with whom a beneficiary is enrolled under this article, shall not be covered under the Medi-Cal program unless they are provided on an emergency basis or authorized by the responsible primary care provider.