Dear Venu, IELTS is accepted in countries like Ireland, New Zealand, Australia, UK and Canada. This is a language proficiency test usually taken for educational and employment purposes. IELTS is just one criteria among many that you need to fulfill to work abroad. For few countries, your job should be listed amongst the 'Highly Skilled Occupation' to hire an overseas candidate. So before you attepmt either IELTS or TOEFL, you need to figure out which country do you want to work in. In USA, BAMS professionals cannot be called Doctors. You cannot diagnose a medical condition nor can you interfere with the prescription of a legal physician.