The prevalence of autism is rising, a dynamic attributed to numerous explanations (e.g. better diagnostic practices, decreased stigma). As this neurodevelopmental disability increases in visibility, disparities in its diagnostic rate grow. Female and Black populations in the United States have historically lower prevalence, are diagnosed later, are more likely to have co-occurring intellectual disability, and experience exclusion from research. Autistic Black girls are effectively invisible in the literature. To combat this exclusion, this narrative review discusses intersectionality theory and how it may be used to provide integrated models that are inclusive toward diverse gender, ability, and racial/ethnic backgrounds. Systemic inequalities, including prenatal care and misdiagnosis, disproportionately negatively impact the quality of care available to female and Black autistic populations. The authors recommend that research include autistic populations with co-occurring intellectual disability, include a diagnostic evaluation as part of protocols, and clinically, universal screening and improved provider competence and confidence in working with diverse autistic populations.