165 Background: Outpatient palliative care clinics (PCC) are a developing frontier of palliative medicine. Characterizing and promoting financially viable models for payment of services are imperative to the sustainability of PCC. There is a paucity of research addressing payer mix – meaning the breakdown of individuals and organizations that pay for a provider's services – in PCC or its impact on metrics important to quality in PC such as hospital length of stay (LOS) and hospital readmissions. We seek to describe the payer mix for our academic outpatient PC practice. Furthermore, we sought to identify if payer mix (commercial, government—Medicare, Medicaid – or self-pay) influenced hospital LOS, discharge to hospice, or readmissions. Methods: After obtaining IRB approval, we conducted a retrospective chart review of supportive oncology patients from 2014-2017 (n = 3137) using data restricted to ICD10 codes for solid tumors. We performed bivariate tests and multivariable logistic regressions to examine the main effects of length of stay (LOS), readmissions, insurance status, and discharge disposition using SAS version 9.4 (Cary, NC). Results: Payer mix included 711 (24%) commercial insurance enrollees, 2357 (75%) Medicare or Medicaid recipients, and 38 (1%) self-pay. Mean LOS was 12.7 days (SD 16.38). The majority (94%) of patients had more than 5 readmissions. Commercial insurance was associated with prolonged LOS ( > = 30 days), discharge disposition to hospice, and hospital readmissions ( > 5) compared to government insurance (p < 0.05). Of the 3137 patients, 325 (10%) expired, 1328 (42%) were discharged to hospice, while 1463 (47%) were discharged to rehab, skilled nursing facilities or home care. Conclusions: The majority of patients in our academic PCC had governmental insurance and were less likely than those with commercial insurance to have prolonged LOS, discharge to hospice, or hospital readmission. These findings provide evidence that further investigation is needed to examine the effect of payer mix on PCC and patient outcomes.