Seladi-Schulman, J. (2021, April 22). What is pdd-nos? Healthline. https://www.healthline.com/health/autism/pdd-nos.

University of Rochester

Before 2013, this diagnosis was given to individuals with autistic symptoms that didn’t meet full diagnostic criteria. It existed as a sort of “etcetera” category, that now due to the spectrum nature of autism diagnoses, is no longer needed and no longer valid. 

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