Member of Asiatic Society - The only Doctor member in last 200 years.
On the International Advisory Panel of the Journal of Respiratory Medicine (formerly British Journal of Chest Diseases) from August 1986 - the first Indian to be so appointed in the annals of the Journal.
Past Governor of the International College of Chest Physicians and Surgeons - Western India Chapter.
Was on the Editorial Board of the Indian Journal of Chest Diseases and Allied Sciences.
On the Board of the Chest Speciality of the Academy of Medical Sciences.
Past President of the Association of Chest Diseases of India.
Regent for India of the International and American College of Chest Physicians and Surgeons from 1988 - 1996.
Patron, International Update in Cardiopulmonary Diseases, Bombay, 1988.
President of the World Congress on Pulmonary and Critical Care Medicine, Bombay, 1989.
Fellowship of many other Academic Bodies including the College of Allergy and Immunology, Founder Fellow of the College of Physicians of India, Fellow of the Royal Society of Medicine, London.
Patron of the first Congress of the Critical Care Society of India held in Bombay, 1994.
Patron of World Conference on Cardiopulmonary and Critical Care Medicine in Bombay, 1995.
Appointed to the Scientific Committee of the Indian Council of Medical Research.
Awarded a Master Fellow of the International and American College Chest Physicians in 1997 - the only Indian and second Asian to be conferred this award. Only eight individuals have been conferred this award in the last sixty years.
Elected Fellows of the Royal College of Physicians of London in 1998.
Elected Fellow of the American College of Physicians in 2000.
Patron of 16th Asia-Pacific Congress on Diseases of the Chest (APCDC) held in Bombay, from 29th Nov to 2nd Dec 2001.
Patron - National conference on Management of HIV/AIDS in restricted settings, held in Mumbai, 21st and 22nd February 2004.