Wairoa Hospital will provide ED services for essential and urgent cases.
Central Hawke's Bay Health Centre inpatient ward will be closed.
General practices and most other health services across the region will not be directly affected by the strike action.
In case of emergencies, patients should go to the Emergency Department.
Where possible, however, they should contact their general practice or urgent doctors for non-emergencies. Healthline – 0800-611 116 – continues to be available for medical advice, and 111 for emergencies.
Chief executive Kevin Snee thanked staff, the contingency planning team, general practice and other health providers for the support they were offering the DHB.
"We apologise to our patients whose operation or appointment will have to be deferred and we will rebook them as soon as we can," he said.
* If patients haven't heard from they can call 0800 248 794 for more information or help.