Dr Srinivas Rao Dharmana was left with cuts to his face after the attack, which happened while he was locking up the Family Practice at 7pm in Queens Drive, Walton, Liverpool on 23 January.
The group, described as wearing dark clothing and balaclavas, threatened him and stole his keys and Rolex watch before stealing his black Audi TT car. One of the group may have been armed with a knife.
The GP attempted to stop the gang from driving off but they drove his car at him. The car was later found less than a mile away in Sonning Road, Walton.
Merseyside police are investigating the incident and at the time of going to press no arrests had been made.
Detective Inspector Martin Earl said: ‘This was an unprovoked attack on a gentleman who provides a vital public service to the community in Walton. Queens Drive is a major route used by pedestrians and motorists alike and I would appeal to anyone who may have seen something, or who has information which could help us with our inquiries, to contact us.
‘The victim suffered a superficial cut to his face during the incident and did receive treatment at hospital. He is really shaken up by his ordeal and I would urge anyone who has any information to contact us so we can find and arrest those responsible.
‘During the incident the offenders drove the car at the victim and he is lucky that he wasn't seriously injured. I would like to take this opportunity to remind people that incidents such as this are rare, but if you find yourself victim to this type of crime make sure you put your own safety first, before that of your property.’
Anyone with information can contact the police on 0151 777 6064 or Crimestoppers on 0800 555 111.