OBJECTIVE: There has been an increase in Child Psychiatry Access Programs (CPAP) across the United States to address the national child and adolescent psychiatry workforce shortage by supporting pediatric primary care providers (PCPs) in providing mental health services. The objective of this systematic review is to synthesize the expanding literature on CPAPs. METHOD: A systematic literature search was conducted in PubMed, PsycInfo, Embase, and Web of Science databases to identify articles published from database inception to April 6, 2022, to identify CPAPs, defined as programs with mental health specialists providing rapid remote mental health consultation services to pediatric PCPs. Study outcomes included program adoption, provider experience, patient and caregiver experience, program cost, and patient mental health. RESULTS: None of the 33 included studies were randomized controlled trials. Most of the studies (n = 30) focused on program adoption and provider experience (n = 18). Few studies examined patient and caregiver experience (n = 2), program cost(n = 4), or patient mental health (n = 4) outcomes. CPAPs showed year-over-year growth in adoption and were generally well-received by providers and caregivers. Health care provision costs were quite varied. No articles reported on changes in patient mental health according to validated measures. Heterogeneity in the methodological quality, study design, and outcomes used to evaluate CPAPs hindered comparison among programs. CONCLUSION: Rigorous research on the impact of CPAPs is lacking. Findings show high provider satisfaction with CPAPs, yet few studies examine patient-level mental health outcomes. CPAPs and funding agencies should consider prioritizing and investing in research to build the evidence base for CPAPs.