The federal government has called for an urgent investigation into a Melbourne GP clinic accused of discrimination after allegedly charging patients more to see female doctors.

Theatre producer Laura, who did not want to use her last name, said she recently visited Myhealth North Eltham and was shocked to see a sign detailing separate fees for male and female doctors.

According to the sign, it costs $7 more to see a female GP. A standard consultation with a female doctor costs $82, compared to $75 with a male doctor.

The sign posted to Facebook.

"I've never seen it before and I just think what a ridiculous policy to have in place," she said.