Universal screening for postpartum mood and anxiety disorders (PMADs) has been recommended for all new parents at outpatient postpartum and well-child visits. However, parents of newborns admitted to the NICU are rarely able to access these services during their infant’s prolonged hospitalization. The objective of this study was to determine the prevalence of mental health screening and treatment programs for parents or other primary caregivers in NICUs across the country. In this cross-sectional study, US NICU medical directors were invited to complete an online survey about current practices in mental health education, screening, and treatment for primary caregivers of preterm and ill infants in the NICU. Comparative analyses using Fisher’s exact test were performed to evaluate differences in practices among various NICU practice settings. Survey responses were obtained from 75 out of 700 potential sites (10.7%). Of participating NICUs, less than half routinely provided caregivers with psychoeducation about mental health self-care (n = 35, 47%) or routinely screened caregivers for PPD or other mental health disorders (n = 33, 44%). Nearly one-quarter of the NICUs did not provide any PMAD screening (n = 17, 23%). Despite consensus that postpartum psychosocial care is essential, routine mental health care of primary caregivers in the NICU remains inadequate.