Sunak who was speaking in an interview said his healthcare was a personal choice.
But nursing union leader, Pat Cullen said the Prime Minister needed to come clean as a public servant.
And when asked the same question, shadow health secretary, Wes Streeting said he did not use private healthcare.
A newspaper report in November last year suggested Sunak was registered with a private GP practice that offers on-the-day appointments and charges two hundred and fifty pounds for a half-hour consultation.
