Anupam Banerjee has been suspended from the medical register and may not practise as a doctor in the UK.
Dr Banerjee, who is generally known as Tony, stepped down from his role with Hull Clinical Commissioning Group earlier this year, saying he was having difficulties juggling his roles as a GP and CCG chairman.
The GMC said they would not discuss individual cases, but issued a statement, saying: “He is suspended by an interim orders panel and we can confirm there is an investigation into his fitness to practice.”
The suspension which started on November 5 will continue until the investigation is finished.
During his training as a GP, Dr Banerjee worked in Withernsea and Willerby.
He spent a year and a half at a practice in Cottingham, before coming to the Marfleet Group Practice in 2009.
A bout of advanced bowel cancer at the age of just 23, which meant daily chemotherapy and radiotherapy at Princess Royal Hospital, and a major operation at Castle Hill Hospital, when he was working there as a junior house doctor, saw him experience at first hand what it was like to be a patient.
Earlier this year he completed a series of gruelling runs to raise more than £15,000 for the Teenage Cancer Trust, which has a facility at Castle Hill Hospital.