So..firstly you need to visit the official website of AIIMS at aiimesxam.org (//aiimesxam.org) and then click on the result notification, you will get the pdf form of merit wise result.Check for your roll number.
just got through the link provided for more information and i hope this would helps you. All the best!!
Please follow the below link for information regarding AIIMS exam.
All India Institute of Medical Sciences (AIIMS), New Delhi,has released AIIMS PG 2020 result on November 22, 2019, in online mode. The exam that was held on 17th November, has its results declared on there website. The mock round counselling will begin on 2 December 2019.
LInk to results:
Please use the college predictor, for AIIMS PG,
AIIMS PG College Predictor 2020 - Predict Colleges based on your Rank
AIIMS PG College Predictor 2020 - Know your admission chances based on your caste, seat type & exam result for AIIMS campuses & get your AII ...
Hope this helps,