The Department of State has announced that the consular posts worldwide will give priority and grant emergency visas to medical professionals, especially those who can treat or mitigate the effects of COVID-19. This update can be found here. Medical professionals with approved I-129 or I-140 (with current priority date) or valid form DS-2019 should approach the respective consulate seeking emergency appointment.
Medical professionals in India fitting the above description may login into their profile on http://cdn.ustraveldocs.com/in/ and raise a request. Should you need any assistance Attorneys at Murthy Immigration Services are available for help.