Psychiatric conditions are common in autism; however, a multitude of barriers exist in accessing community-based mental health care for autistic youth. Perhaps the first and most formidable barrier is identifying a provider that offers mental health treatment to autistic youth within the many service systems involved in supporting the autism community. These systems typically function independently of one another, contributing to the complexity of accessing services. To identify gaps caused by New York's multisystem care model for autistic youth, and as part of a larger quality improvement initiative to advance suicide risk management in several New York City emergency departments, we conducted a telephone survey to identify outpatient mental health service availability for autistic youth with depressive symptoms or suicidal thoughts or behaviors in New York City across the state's mental health and developmental disability systems. Results demonstrated that while a greater proportion of clinics in the mental health system compared with agencies in the developmental disability system offered outpatient mental health services to autistic youth (47.1% vs 25.0%), there is remarkably limited service availability overall. Efforts to reduce these care inequities through policy reform and improving workforce capacity are urgently needed.