Background: The Institute of Medicine (IOM) and Commission on Cancer (CoC) recommend systematic delivery of supportive oncology and survivorship care to all cancer patients. CSOC aims to improve the quality of supportive care across Chicago-area providers. Methods: 35 CSOC participating institutions (cancer centers, support centers, hospice) formed care delivery design teams - Distress, Survivorship and Palliative. Teams collaboratively developed solutions to supportive oncology gaps: patient screening tools, care delivery processes, provider training, and quality metrics to assess supportive oncology quality and the CSOC impact. Six implementation centers (2 safety-net, 3 academic & 1 public) reviewed charts at baseline (2014 diagnoses) and after the initial implementation period (2015 diagnoses), compared by frequencies and Fisher’s exact test. Results: Eight metrics contained patient data at 2 time points; improvements were seen in 7/8 metrics. (See Table). Conclusions: CSOC developed supportive oncology screening, and care processes aligned with IOM and CoC standards. Significant improvements were shown after implementation across diverse settings. Ongoing work will further evaluate the impact of CSOC efforts on patient care.