Web-based Managed Care Software & MSO Services for Physician Groups in Northern California. With our roots in Silicon Valley, Pacific Partners Management Services,Inc. brings the power of Web technology to physician network and office management. PPMSI web-based systems reflect many years of experience with physicians and medical groups in both HMO and third party settings. We offer innovative, yet affordable MSO solutions and software with the right administrative controls to effectively manage medical group risk. We are also a software vendor who markets, sells and supports the Access Express web-based application. Covering over 3 million lives with 26,000 provider offices currently using the application.