An expanding evidence base has advocated for delivery of naturalistic developmental behavioral interventions (NDBIs) within community systems, thus extending the reach of these practices to young autistic children. The current study examined provider-reported use of NBDIs within a Part C Early Intervention (EI) system and the extent to which provider background, attitudes, and perceived organizational support predicted NDBI use. Results from 100 EI providers representing multiple disciplines indicated reported use of NDBI strategies within their practice despite inconsistent reported competency with manualized NDBI programs. Although NDBI strategy use was not predicted by provider experiences or perceived organizational support, provider openness to new interventions predicted the reported use of NDBI strategies. Future directions include mixed methods data collection across and within EI systems to better understand NDBI use and ultimately facilitate NDBI implementation.