Abstract: In the United States (US), the proportion of adults over the age of 65 years is increasing compared with other age-range cohorts. The aging population is expected to result in a marked increase in cancer diagnosis and demand for oncology services. The aim of our study was to perform an interdisciplinary needs assessment of clinicians in a VA hospital-based oncology clinic evaluating the implementation of geriatric oncology principles into medical practice. Between January and April, 2022 surveys were distributed to participants (Supplementary Survey S1). Participants surveyed included hematology/oncology fellows (including years 1–3 of training), hematology and oncology attending physicians, and advanced practice providers (APP) including nurse practitioners (NP) and physician assistants (PA) practicing at a single-site, VA-affiliated oncology clinic in San Antonio, Texas. The overall theme common among all cohorts indicated the desire for a more interdisciplinary approach and incorporation of geriatrics-trained faculty/geriatricians into the workflow of the oncology clinic. Among participants, the services of a geriatric-focused interdisciplinary team listed as most helpful included performance of GA, assessment for needed services (e.g., home health, respite care, etc.), and assessment of psychosocial needs, with answers differing slightly among cohorts. Although the current study is difficult to generalize, these findings are of concern in that key knowledge gaps still persist in modern clinical oncology practice, which may be because of the lack of geriatric oncology curriculum included in nursing, allied health, and physician training programs.