Dear Shivam

It is difficult to exactly predict the exact rank which will be need to get admission in MD Microbiology course in AIIMS, given that the ranks needed changes every year with the number of other aspirants competing, the difficulty level of exam, etc. 

However, you could get an idea of the same from previous year data. Given below is previous year data:

• MD Microbiology- In 2017, the last rank from unreserved (UR) cateogry which got admisison in MD Microbiology course in AIIMS was 713. This rank got admission in AIIMS Raipur. 

Hope it answers. All the best!