During his stay abroad, he had teaching stints at Cambridge University, London University and Harvard University.[1] Returning to India in 1975, he joined the All India Institute of Medical Sciences, Delhi as a member of the faculty and stayed there until his superannuation in 1996.[3] During his tenure there, he helped found the Department of Gastrointestinal Surgery and Liver Transplantation at AIIMS, of which he was the founder professor.[5]
In 1996, he joined Sir Ganga Ram Hospital, Delhi where he is the Emeritus Consultant of the Department of Surgical Gastroenterology and Liver Transplantation.[6] He led the team which is credited with 241 liver sections during the period 1996-2005, the details of which were published in a medical paper, Two hundred and forty-one consecutive liver resections: an experience from India.[7]
Nandy serves as a member of the advisory board of Medicounsel, a medical advisory organization composed of noted medical specialists, engaged in providing guidance to patients inflicted with rare and complicated diseases.[3] He is also a part of the team of 290 specialists of DoctorNDTV. Com,[13] an online consultation forum, functioning under the aegis of the NDTV network. The website is reported to have a monthly average of 400 million views and, 3600 queries.[3] His contributions are also reported behind the Transplantation of Human Organs Act 1994, which made human organ trading illegal and recognised brain death as a form of death in India.[10]
In May 2014, Nundy wrote an editorial in the Journal of Current Medicine Research and Practice in which he exposed the corrupt practices in the Indian health sector.[14] He mentioned the practice of unnecessary investigations and referrals made by the doctors and their practice of accepting commissions for the referrals.[9] He suggested computerisation of medical records and procedure audits to combat this trend.[9] His editorial was inspired by the article, "Corruption ruins the doctor-patient relationship in India", published in the British Medical Journal and written by David Berger, an Australian physician who had worked as a volunteer at a charitable hospital in India.[15] The article and the subsequent editorial made news among the medical fraternity and have drawn concurring responses from the government.[16]
^ ab"Padma Awards"(PDF). Ministry of Home Affairs, Government of India. 2015. Archived from the original(PDF) on 15 October 2015. Retrieved 18 June 2015.