This allows us to grow together and better serve our patients by providing specialty services and more primary care physician options. We expect the new architecture and intuitive navigation of Provider Central to improve the experience for anyone looking for provider-specific information on the Alliance website. Billing and Enrollment Trainings Scheduled, The Alliance billing and enrollment team will offer virtual information and technical assistance sessions for claims and enrollment related topics and questions. 207 . General authorization information or questions. Alliance Health Systems, IPA 5233 Beverly Blvd.Los Angeles, CA 90022, Office: (323) 724-6910 Access important phone numbers to use in contacting Alliance Health. Fax (916)323-5400, Accountable Healthcare IPA (aka Accountable Healthplan Medical), Centinela Valley IPA (formerly Robert Kennedy IPA), Chinese Community Health Care Association, Good Samaritan Medical Practice Association, Hill Physicians Medical Group - Bay Region, Hill Physicians Medical Group - Sacramento Region, Hill Physicians Medical Group - San Francisco Region, Hill Physicians Medical Group - San Joaquin Region, Hill Physicians Medical Group - Solano Region, Hispanic Physicians IPA dba Medico Hispano IPA, Omni IPA Medical Group, Inc. dba Medcore Medical Group, Physicians Choice Medical Group of Santa Maria, Sutter East Bay Medical Foundation Sutter East Bay Medical Group, Sutter Gould Medical Foundation - Gould Medical Group, Sutter Medical Foundation - Sutter Medical Group, Sutter Palo Alto Medical Foundation - Mills-Peninsula Division/Mills-Peninsula Medical Group, Sutter Palo Alto Medical Foundation - Palo Alto Foundation Medical Group, About the health care quality ratings and more. Pharmacy.