The doctor from Peterborough was out hiking alone wearing a blue jacket, dark pants and a green bag and has not been spotted since.
The fear for Dr Baileys life comes after the French mountain rescue service, PGHM Chamonix Mont-Blanc launched an emergency appeal to find him on Friday.
It said: "URGENT… Gone yesterday on hiking sector les houches col de la forclaz…. Immediately notify the gendarmerie via 0800971071. Spread as much as possible please."
However at present, the search team have no more information and the appeal for witnesses has been unsuccessful so far.
The PGHM rescue service have said they will continue to fly over the area in a helicopter this week in hope of locating him.
Minster Medical Practice in Peterborough has confirmed that Dr Bailey, a senior partner at the clinic, was involved in an accident.
A recorded message for callers to the practice says: "We are extremely saddened to advise that last Thursday Dr Bailey, who was on holiday in Chamonix, was involved in an accident.
"We know that this will be a difficult time for patients and staff and we would ask for your patience whilst trying get through or trying to make an appointment with the practice."
Dr Bailey is the clinical lead for end of life care at the Peterborough & Cambridgeshire Clinical Commissioning Group (CCG), Cambs. He is also on the board of the Local Commissioning Group.
Dr Gary Howsam, clinical chair at the CCG said: "Sadly we can confirm that Dr Bailey, senior partner at Minster Practice, part of the Octagon group, who was on holiday with his family, has been reported by the French police as missing, presumed dead.
"This is an extremely distressing time for everyone who knows and works with Rob Bailey as well as his patients and the local community.
"Minster surgery will be open as normal, and the practice are providing emotional support to his colleagues.
"Our thoughts are with his family. We would ask that people respect the privacy of family and staff at this time."
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