Billing & Insurance For questions regarding your bill please call our billing service at 415-883-1218 or 800-606-9729. California Advanced Imaging Medical Associates contracts with most insurance companies. Frequently Asked Questions Who is responsible for insurance authorization of my study? It is the responsibility of the patient and the referring physician to verify insurance eligibility and to obtain required authorizations before scheduling services. What insurance information should I bring at the time of my exam? Patients should bring current health insurance cards to appointments to insure proper billing. If insurance information is incomplete or inaccurate, the patient will be responsible for payment. Do you contract with my insurance plan? We have contracts with most insurance carriers under our former medical group name "Marin Radiology." Since we have recently changed our name to "California Advanced Imaging Medical Associates", most of the billing documents will continue to list "Marin Radiology" as the service provider. This will change over the next year as the documentation is processed by the carriers. What if my insurance company is out of the country ? CAIMA does not bill insurance companies that are out of the country For a hospital based examination, why did I receive bills from both the hospital and your medical group? It is standard to receive a bill from the hospital (which covers the "technical expenses" for performing the study) and a separate bill from the radiologist (which covers the physician work of supervising and interpreting the study.)