The National Autistic Society (NAS) is to mount a direct mail campaign to 34,000 GP practices.
Starting this week, the campaign aims to raise awareness of autistic spectrum disorders among doctors and promote the NAS Autism Helpline to parents.
The mail pack, supported by Barclays, contains helpful information to GPs including a reference leaflet and a GPs' guide to adults with Asperger Syndrome.
GPs will also receive posters highlighting some of the characteristics of autism, along with handout cards giving details of the Autism Helpline to be displayed in surgeries or health centres.
NAS will include a questionnaire asking GPs about their experiences of the assessment, referral, diagnosis and support of patients with autistic spectrum disorders.
The survey will enable NAS to understand the availability of resources for GPs to support such patients.