Dear Anil, the first Medical Batch was established in West Bengal by the British Government in 1835. We are 16 years short of 200 years. Considering the fact that every batch has to study for 5 and 1/2 years including the rotatory internship, you can do the math. And what started as a single Medical College in 1835 grew to as many as 700 Medical Colleges including Government/Private/Self financed/Deemed/Central Universities. The no.of batches that might have passed MBBS cannot be guessed without enough data. If you are interested in studying Medicine, this might help you:

Careers360 is conducting the All India Talent search exam where students of 11th and 12th PCM/PCB can test their knowledge and enhance their preparation by knowing their stronger and weaker areas and win prizes and scholarships worth 1.25 Crore.
If you are an Engineering or medical aspirant, it is a great opportunity for you. Take the test, perform the best, avail the scholarship and win prizes.

You can win exciting prizes such as:
50,000/- cash Prizes, Upto 100% Scholarship on JEE / NEET AI-Based preparation packages, Laptops, Smartphones, Amazon Echo, Careers360 Almanacs, Powerbanks, Upto 250/-  paytm *Cashback offer

Link: https://learn.careers360.com/careers360-talent-search-exam/?icn=qna&ici=interns