Background: Behavioral health interventions that support low-income children and their families in under-resourced communities have a positive impact on child development; however, few interventions exist that highlight approaches providers use to contribute to this positive development. Objective: To identify key strategies used by pediatric primary care physicians (PCP) and specialty mental health providers to improve access to and engagement in mental health services for low-income children and their families engaged in behavioral health services. Method: Using the inductive constant comparative approach, researchers conducted 11 semistructured interviews with six PCPs, one staff member from a federally qualified health center (FQHC), and three mental health providers and one staff member from two local mental health clinics. Results: Three main themes were identified that were used by PCPs and specialty mental health providers to improve access to and engagement in mental health services for low-income children and their families. Conclusions: These themes highlight how PCPs and specialty mental health providers engage in critical strategies to support their efforts to improve access to and engagement in mental health services for low-income children and their families. The present study offers evidence that identifying effective strategies for providers to improve access to and engagement in mental health services for low-income children and their families is an important step toward the national priority of integrating mental and behavioral health services into pediatric primary care.