Background: GA is a multidisciplinary assessment consisting of the following domains: physical function, comorbidity, cognition, mood, social support, nutrition and medication review. Conducting a GA with validated instruments to assess these domains has been shown to improve outcomes in older adults with cancer [Soo, et al ASCO 2020]. The utilization of validated GA tools and its domains versus use of other surrogates from history and physical exam (HPE) for risk-stratification in older adults in the community practice setting is unclear. In this survey-based study, we assessed the knowledge of GA and the methods used to evaluate GA domains among cOH. Methods: Questions pertaining to GA and the care of older adults with cancer were developed by two medical oncologists (AG and BAF) and presented to cOH with diverse US geographic representation at live meetings and via web-based questionnaire between September 2019 and March 2020. Results were analyzed using descriptive statistics. Results: Of the 173 participants surveyed, 59% reported performing no GA, while 13% and 28% reported performing GA on all and selected older adults, respectively. When presented with a list of daily living activities, over half of cOH were unable to correctly identify all activities of daily living (ADLs) and instrumental ADLs (56% and 70%, respectively). The top 2 methods used by cOH to assess physical functional were the ECOG performance status (82%) and HPE (42%). For assessment of cognition, most cOH used HPE (78%) or the Mini Mental State Exam (MMSE; 12%). Social support was assessed via HPE (44%) or GA (27%). cOH reported that medication review is performed by an office staff (medical assistant 31%, nurse 12%, pharmacist 5%), with the physician signing off on the information reported in the chart irrespective of who entered the medication information (50%). Regarding chemotherapy dosing in older adults with cancer, only 7% utilized GA to inform chemotherapy dose; 48% reported starting at a lower chemotherapy dose with intent to escalate, while 33% reported starting at the standard dose with intent to de-escalate if toxicity is encountered. Lastly, 27% stated that oncologists are not adequately equipped to care for older adults with cancer given the complexity involved. Conclusions: Many cOH do not utilize validated instruments to assess the domains of GA. There also appear to be knowledge gaps regarding individual domains of GA. There is a need to further the education of cOH regarding the components and value of GA in older adults with cancer.