After obtaining the first postgraduate degree, that is MD/MS/DNB, one can go for further specialisation in medical or surgical fields.This involves a highly competitive entrance examination. Course has three years of additional training and study and then after passing an examination, both theory and practical.
The degree awarded is DM (Doctor of Medicine), like DM in Cardiology, Neurology, Nephrology, Gastroenterology, NeuroRadiology,Critical Care, Pulmonology, Hematology, Medical Oncology, Cardioanaesthesia, and Neuroanaesthesia.
DM (Super Speciality Degree (Doctor of Medicine)
DM is a super specialty program in medicine of 2 to 3 years duration. The entry requirement for this course is MD (Doctor of Medicine)
MCh - Super Speciality Degree (Master of Chirurgical)
M.Ch is a 2 years super specialty program in surgery. The entry requirement for this course is MS (Master of Surgery)
For surgical superspecialities the degree awarded is MCh (Magister Chirurgiae), like MCh in Cardiac Thoracic and Vascular Surgery, Neurosurgery, Gastrosurgery, Urology,Plastic Surgery,Pediatric Surgery etc.DM and Mch are Doctorate degrees. A third alternate qualification is DNB (superspecialties), offered by National Board of Examinations, like DNB in Cardiology, Neurology, Cardiac Surgery, Neurosurgery.
The DM and MCh degrees are super-specialties and are very high ranked/prestigious.
Following DM or Mch,one can further go for a third postdoctorate degree that is, postdoctoral fellowship programs of one year duration in specific subspecialities like Cardiac Electrophysiology,Invasive cardiology,Pediatric cardiology, Epilepsy, stroke, electroencephalography,movement disorders,neuromuscular disorders,cerebrovacular surgery, skull base surgery,pediatric cardiac surgery etc. offered by prestigious government institutes.