Through Assessments, persons with Autism with a diagnosis may be given a gradation of Autism. As mild, moderate or severe which is supposed to indicate the level of functioning and the level of support needed by the individual. But this demarcation is not permanent. Depending on their health, training, education and support (especially in home) the level can change.
The other way Autism is graded mostly in western countries and to some extent in India is that it is marked as Level 1 Level 2 and Level 3. These levels indicate levels of support needed for the person with Autism. These levels were introduced in the Diagnostic and Statistical Manual of Mental Disorders (DSM-5).

