Dr Garret said he believed patients would “notice a difference”.
He said a big focus would be on rebuilding three hospitals in the area – projects at the West Suffolk Hospital in Bury St Edmunds, James Paget Hospital in Gorleston and the Queen Elizabeth Hospital in King’s Lynn, have previously been announced.
Having a single ICB across Norfolk and Suffolk will help improve the Norfolk and Suffolk Foundation Trust, according to Dr Garret.
The mental health provider has been criticised by patient groups and health inspectors for failings over several years.
A report last year from the Care Quality Commission rated it as “requires improvement”, although inspectors noted improvements had been made.
Dr Garret said access to GPs, dentists and pharmacists was a “big priority” for the new ICB and that would be where the biggest difference would be noticed by patients.
Emergency departments at hospitals and response times for ambulances are other areas the new boss highlighted as services to focus on.
He said assessments on the quality of services would be made public.