This study explored the impact of disruptive behavior disorder (DBD) comorbidity on theoretically relevant correlates among 87 children and adolescents with autism spectrum disorders (ASD) and clinically significant anxiety. Relative to youth with ASD and anxiety alone, participants with ASD, anxiety, and DBD: (a) presented with significantly more severe anxiety symptoms per clinician-, parent-, and self-report; (b) were more likely to be prescribed antipsychotic medication but were no more likely to receive additional psychosocial and educational interventions; and (c) experienced significantly greater functional impairment and family interference. These results suggest that co-occurring DBD in the context of ASD and anxiety confers greater risk for heightened symptom severity and functional impairment, and may be linked with increased prescription of antipsychotic medication.