The fight happened in front of the couple's children.
Mr Mansfield said the doctor had been under a huge amount of stress at work but since the incident he had undergone counselling for dealing with stress.
"He's been man enough to admit what he did."
Mr Mansfield said his client had made changes in his life and the couple were now back together.
"No matter the job you work in or where you reside, no one is infallible and if we're not careful we can succumb to work pressures in this way," Mr Mansfield said.
Police prosecutor Brent Thomson said police did not oppose the discharge without conviction and would have offered diversion if it had not been a family violence charge.
Judge Philip Recordon praised the doctor for acknowledging what he had done wrong from the beginning.
"You've done what is required to do and you've done it on a voluntary basis. In fact, you've gone further in many respects."
He said a conviction would impact on the doctor's work and agreed with Mr Mansfield that a discharge without conviction was appropriate because the consequences of a conviction would outweigh the gravity of the offending.