Former GP Dr Sarah Wollaston has been appointed the new chair of the health select committee.
Dr Wollaston takes over from outgoing chair Stephen Dorrell, who announced last month that he would be stepping down.
She said Dorrell had shown "exemplary leadership of the select committee over four years, which has been widely respected."
Dr Wollaston said the NHS is the "most extraordinary achievement and also the most extraordinary challenge".
"The new chief executive of NHS England has called on everyone within the NHS to think like a patient and act like a taxpayer," she said.
Dr Wollaston added: "I think the role of the select committee is to ask those challenging questions on behalf of patients and taxpayers so this most cherished of our institutions in this country can continue to be there for all of our constituents when they need it the most."