While “types of autism” is a commonly searched term, the current diagnostic framework uses a single diagnosis, autism spectrum disorder, with varying support levels. Understanding the spectrum helps families and professionals provide appropriate support.

Historical Types (No Longer Used)

Before 2013, separate diagnoses included autistic disorder (classic autism), Asperger syndrome, PDD-NOS (pervasive developmental disorder not otherwise specified), childhood disintegrative disorder, and Rett syndrome. These were merged into the ASD diagnosis because boundaries between them were unreliable.

Current Framework: Support Levels

• Level 1: Requiring support. Verbal, independent in many areas, struggles with social flexibility.
• Level 2: Requiring substantial support. Marked communication deficits, obvious restricted interests.
• Level 3: Requiring very substantial support. Severe communication limitations, extreme rigidity.

Real-World Presentation

In practice, autism presents across multiple dimensions simultaneously. Each person has a unique combination of strengths and challenges.

Treetop ABA Therapy provides individualized care for all presentations. Contact us for an assessment.