Newbie! Diagnosis question?

Hi,

My son 7 year old son has just been diagnosed to be on the spectrum, I'm completely new to all this.  I was expecting them to tell me what 'type' he has, but they said they no longer do this, it's just classed as having ASC?  Is this true, or do I need to go privately to have a more detailed diagnosis? I'm pretty convinced he has Asperger and I think it would be helpful to know this.... but I might be just wrong or naive?

Any help, gratefully received.  Thank you.