- Professional HealthCare Staffing in Northern California Phone (650) 877-8111 / (408) 379-8855 or e-mail: drg@backinsf.com 400 Oyster Point Boulevard, Suite # 440, South San Francisco, CA 94080 Nursing case management, utilization review, quality assurance, record abstraction, workers comp, discharge planning Mental Health behavioral health and psychiatry staffing Rehab physical, occupational and ...www.drgstaffing.com