Yes to get the admission in All India Institute of Medical Science (AIIMS), You have to appear for the AIIMS examination and based on the scores achieved in the exam you will be able to get the admiaaion in the AIIMS. AIIMS is the group of the autonomous public medical colleges for the higher studies and situated in the various states of India. The admissions in the AIIMS will be through the entrance and it is not related to the NEET so you do not confuse with that. Refer the link to know more about the AIIMS exam and the admission procedure to be followed.

https://medicine.careers360.com/articles/aiims-mbbs