This Commonwealth Fund–supported study found that contrary to expectations, primary care practices serving poor and minority neighborhoods were more likely than other practices to have key components of the medical home primary care model in place. Based on a survey of primary care practices in Massachusetts, the study found these practices were more likely than others in the state to have on-site language interpreters, clinicians who speak multiple languages, and frequently used, multifunctional electronic health records—all attributes of a patient-centered medical home.