Abstract As the US population ages, primary care is expected to be the health care “home” for older adults, and several initiatives are aimed at helping to transform primary care practice to care for this population. Wide variation in staffing has been observed. Meyers et al proposed ideal models of primary care staffing for a general population and for a frail elderly population (2018). We developed the 2018 Survey of Primary Care and Geriatric Clinicians to measure optimal team configuration in clinical practices caring for older adults. A majority employed NPs, MDs and PAs, with [r = -.53] between % of clinician labor of NPs and physicians). High-NP practices are more likely located in states with full scope of practice, perform well for frail elders and are less expensive. Meyers' models, with fewer physicians, more SW and CHWs, more RNs, perform better for frail elders, and are less expensive.