The victim, reported to be local man Brian Poigndestre, is believed to have shot himself in the toilets at the practice.
Neighbours told the getSurrey website that Mr Poigndestre’s wife had been ill for some time.
The practice was closed on Monday, with patients diverted to other local services.
But a member of staff at the Station Road Surgery in Surrey told GP the practice reopened on Tuesday, the day after the fatal shooting.
Part of the practice remains cordoned off. The member of staff said the practice was shaken up but doing its best to cope.
‘The impact is here, but we are dealing with it,’ she said.
Surrey Police have confirmed the death is not being treated as suspicious, and that the victim’s next of kin have been informed.
A post mortem is planned for later this week.