The chief operating officer urged anyone who has an appointment but is feeling sick to stay at home and call the number on the appointment letter to let staff know you won't be attending.
He added if there are any changes to appointments, patients will be called directly.
"If you haven't heard from us your appointment will be going ahead," Ash said.
People who are visiting HBDHB facilities must wear a mask or fabric face covering into hospital, sign in using the QR code at the main entrance or sign in manually and must physically distance.
A HBDHB spokesman said everyone must stay at least two metres away from people you don't know.
"Wash and dry your hands frequently, or use hand gel when entering and exiting wards," he said.
Ash said if you are planning to visit an age-related residential care facility or rest home, please phone first to check visiting hours.
Anyone in Hawke's Bay who may have attended any of the locations of interest visited by the new confirmed community cases of Covid-19, are to follow the Ministry of Health instructions and call Healthline if they're unsure what to do 0800 358 5453.