MD is a Masters/Postgraduate degree.
MS is postgraduate degree in general surgery while MD is the postgraduate degree in general medicine. Both are pursued only after MBBS.
“MS is for some fields where more of surgical expertise and skills are
Bachelor of Medicine and Bachelor of Surgery.
Considered to be one of the most prestigious courses a student can pursue, the Bachelor of Medicine, Bachelor of Surgery course – or to give it its proper latin name, Medicinae Baccalaureus, Baccalaureus