It’s just on degree of ASD symptoms.
My evaluation that was based on DSM V says that I have:
ASD level 1
PTSD
Generalized anxiety disorder
Major Depression
Etc.
Each thing is it’s own entity and doesn’t have a bearing on the other diagnoses I’ve been given. I’m not sure if this is exactly what you are asking for.
I have very mild autism, but taking all of my other problems into consideration, my functioning is greatly impacted. I might struggle more as far as functioning goes than someone who’s autism is at a level 2 but doesn’t have any other limitations. I’m not sure of that, but I think it’s a possibility.
In the DSM IV, there was a global assessment of functioning which allowed doctors to assign a number to a person’s overall functioning, taking the combination of disorders into account and how together they could limit a person’s functioning. Even though it was very subjective, I think it was probably a good idea when it comes to assessing people for disability and social services.