Dr Saqib Uddin Khan, 36, had denied that he carried out an inappropriate internal examination on the woman after she attended the hospital following breast surgery abroad.
But a jury at Lincoln Crown Court this afternoon found Dr Khan guilty of a single charge of assault by penetration after deliberating for just over four hours.
Judge John Pini granted Dr Khan bail as an “act of mercy” while he awaits sentence but warned him that a custodial sentence is inevitable.
The victim was video interviewed by police after complaining that she was internally examined by a doctor after attending A & E with bleeding from one of her wounds.
During the video, which was played to a jury at Lincoln Crown Court, the woman alleged a doctor carried out two internal examinations after asking her if it would be alright to examine her without a nurse being present.
Dr Khan’s own records showed he took a history from the woman after she was moved to a surgical assessment unit from A & E but he denied carrying out any internal examination.
In evidence Khan, a speciality doctor in general surgery at the Pilgrim Hospital, claimed that he attempted to find a female nurse to act as chaperone while he examined the patient but staff were too busy dealing with other urgent cases.
Dr Khan, of Mayfair Gardens, Boston, Lincs, had denied one charge of assault by penetration on 29 September, 2014.
He will be sentenced on a date to be fixed.