J1 visa eligibility after completing J1 Waiver and National Interest Waiver


I am a physician from India currently working on H1B visa. I completed residency training from 2008-2011 on J1 visa and completed 3 years J1 waiver in a medically underserved area. I have an approved I-140 petition under National Interest Waiver (EB-2 NIW) program with a priority date in June 2012. My NIW was approved on basis of 5 years of work as a physician in MUA/HPSA area.

I am planning to pursue further training (Fellowship) and will need visa sponsorship for the same. Most fellowship programs only offer J1 visas. Am I eligible to obtain the J1 visa again? If yes, would I be subject to the 2 years home residency or 3 years of MUA/HPSA service again? Also, if that be the case, what would happen to my currently approved I-140 petition and priority date.

Thank you for your responses and time in advance!