Medical staff from the diabetes teams at Watford, Hemel Hempstead and St Albans hospitals came together to raise awareness about the condition.
Planned events included a study day for nurses to improve their handling of patients with diabetes, and a sponsored motorbike ride from Scotland to Gatwick to raise money for Diabetes UK.
Dr Arla Ogilvie, lead clinician for diabetes services across the three hospitals, said: "We are delighted to be supporting Diabetes Week. With so many people in the UK with diabetes we are pleased and privileged to have a local centre that can support our patients’ needs and help them manage their condition more effectively."
There are currently 3.2 million people living with diabetes across the UK. Around 90% of these have Type-2 diabetes, a largely avoidable condition.
Every year, West Hertfordshire Hospitals treat 2,800 diabetes patients, and the condition affects approximately 17% of all inpatients.