Hii

You need not to do the basic registration again. The basic registration is a one time process and need not to be done again and again. If you have completed your basic registration for January session and it was accepted by the authorities, then aspirants will be asked to participate for AIIMS PG application form 2019 final registration for july session.

You can refer to following link to know more- https://medicine.careers360.com/articles/aiims-pg-application-form

Hope this helps

Thanks!!