Dr Sarah Jarvis has told Daybreak that it would be "difficult" to impose a seven-day rule on GPs and hospitals.
She said: "This is not going to be free, there's going to be a lot of bureaucracy and that means more cost for the NHS and patient care would suffer."
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A father-of-three bled to death after ten teeth were removed during a trip to the dentist, an inquest has heard.
Sunshine with blustery showers and longer downpours
The landowner at the site of excavation to find Ben Needham has said he is considering withdrawing permission to continue with the dig.