Question to the Department of Health and Social Care:

To ask the Secretary of State for Health and Social Care, what the average waiting time is for an adult autism diagnosis.

Data on the average waiting times between referral for an autism assessment and diagnosis is not held centrally. Some data is held on average length of time between referral and first care contact. NHS England analysis indicates that, as of June 2023, for people aged 18 years old and over, there were 3,730 referrals for suspected autism where the date of first care contact falls within the period April to June 2023, which is the latest quarter available. The median waiting time for these referrals was 225 days.

The autism assessment waiting times data published on 14 September 2023 showed that the number of patients aged 18 years old and over with an open referral for suspected autism was 59,099 in June 2023. The data also showed that, in June 2023, 2,906 patients, or 5.8%, aged 18 years old and over with an open suspected autism referral in the month, that has been open for at least 13 weeks, received a first appointment in 13 weeks or less. The subsequent waiting times publication is 14 December 2023.