Cal. Ins. Code § 10123.21
On or after July 1, 1995, every individual or group policy of disability insurance that provides hospital, medical, or surgical coverage entered into, amended, or renewed in this state shall, subject to other terms and conditions as may be agreed upon between the group or individual policyholder and the insurer, provide coverage for the surgical procedure for those covered conditions directly affecting the upper or lower jawbone, or associated bone joints, if each procedure being considered for reimbursement is deemed medically-necessary by the insurer pursuant to the policy's definition of medical necessity. Nothing in this section shall be construed to require the provision of dental services if dental services are specifically excluded from coverage under the terms and conditions of the contract between the group or individual policyholder and insurer.
Ca. Ins. Code § 10123.21