NO there is NO new registeration for esic reservation for mbba in NEET 2018,As regisyeration will be done for the one time only. ESIC  will provide the 'insured personds qouta' to only those who have cleared the eligibility criteria in NEET 2018. 

Th counseling process will be conducted by MEDICAL COUNSELING COMMITTE (MCC). And this will done on the basis on the prefrence of the college and reservation status.

REGISTERATION will be done by 3rd week of june. as the counseling process of seat allotment adn locking will start from 1st week of july,2018 . i hope this helps you. all the best have a great future ahead.