The document provides 13 tips for surgery centers to increase revenue in 2013, including ensuring correct reimbursements, including anesthesia time codes, boosting surgeon buy-in, upgrading systems, collecting copays upfront, rigorous claims follow up, physician credentialing, renegotiating with insurers, verifying patient information, calling patients before appointments, and using a rapid sheet for physicians after surgeries. The tips are presented by Angomark MedicalBillingStar to help surgery centers "pump in more greens" or increase their revenue.