A Sydney GP and another man have been charged over insurance and university fee claim scams involving false medical certificates.

Police say the 50-year-old doctor and the 46-year-old man were arrested as part of an ongoing investigation into compulsory third party insurance fraud syndicates operating across Sydney.

The GP was arrested at a police station last week, a day after the other man was arrested at his home.

Their arrests came after investigators discovered false medical certificates were being submitted to universities in suspected attempts to avoid fees under the state government’s student visa training scheme.