If you are targeting AIIMS then here NEET UG scores are accepted for B.Sc. Nursing (H),  candidates must attempt Neet and qualify for AIIMS.also in JIPMER,pgimer admission is through neet scores whereas nursing programs in some institutions can possible without need to appear in NEET usually they accept class 12th result like manipal college of nursing,apollo college of nursing,srm university etc.you need to aware of last date of application to the particular college in which you want to take admission.