Charges at Presidio Surgery Center are based on the procedure code, plus any charges for implants. Since we require you to pay any deductible and co-insurance portions on the day of surgery, we use the lowest fee to estimate this amount. Charges for anesthesia are based on actual time used and are billed separately by the anesthesiologist. An estimate can be given to you prior to surgery, but additional charges may be necessary if time used is greater than the estimated time. Prior to your surgery date you will be notified of your estimated insurance coverage and amount of co-pay due. We accept Visa and MasterCard. Due to the number of insurance plans, we suggest that you contact your insurance company if you have a specific question regarding your coverage. After surgery we will file your insurance papers for you. If the facility costs are more than anticipated you will be billed for the difference. Any overpayment will be refunded 30 days from receipt of the insurance payment. The bill will not include the services of your surgeon, any lab fees or anesthesia fees. It is your right as a patient to request information or have questions answered regarding fee or payment policies. If you have any questions or problems regarding your bill, please contact our business office. We will be happy to help you between the hours of 8:30 a.m. and 5:00 p.m., Monday through Friday. You may be eligible for financial assistance. Please contact the business office manager at 415-346-1218 for details.