One should get his registration done to practice in Australia. Registration process is lengthy and expensive.
1.   Cline have to complete his qualification assessment by Medical Board Australia (MBA)
2.   Once the qualification assessment is positive, client have to give a written examination
3.   Once cleared the written client will get partial registration which will entitle him to practice in Australia under supervision for 1 year
After completion of registration, client have to apply for the PR visa. Total cost for registration will be approx 10,000 AUD