Resident doctors, who represent nearly half the medical workforce, were expected to walk out of emergency and routine care between 07:00 GMT on Friday and 07:00 GMT on Wednesday 19 November, with senior doctors brought in to cover.
All other NHS staff, including consultants and other specialist doctors, were expected to be working as usual.
Dr Hamish McLure, regional medical director for NHS North East and Yorkshire, said staff would work to ensure as many services as possible continued to operate safely.
“We’re reminding people they should continue to use services as they normally would when they need urgent medical help – by using 999 and A&E in life-threatening emergencies only,” he said.
Dr McLure said that for other health concerns, people should use the non-emergency NHS 111 service, GP services and pharmacies.
Saj Azeb, chief operating officer and deputy chief executive officer of Bradford Teaching Hospitals NHS Foundation Trust, said consultants and associate specialist doctors would be working differently during the strike to ensure patient safety was maintained.
“Throughout this week some elective care and outpatient appointments will be postponed and rearranged so we can ensure we can continue to run emergency care services,” Mr Azeb said.