[3][4] His original research on histopathological specimens of patients with saphenofemoral – incompetency resulted in a paradigm shift in management of varicose veins.

[6] Rai has been featured in the book "Jewels of India"[7] for his contributions to medicine, art, sports and cultural arenas.

He currently lives in Old Westbury, Long Island, New York, with his wife, Shakila Rai, and their three children.

[8] He graduated from Bangalore Medical College with a distinction in Pathology and as captain of an All Indian Regional University Cricket team (South Zone).

He has authored the “Manual of Sclerotherapy and Phlebectomy of Varicose Veins and Telangiectasias for New Practitioners” published by Indian Association of Dermatologists, Venereologists and Leprologists, Bangalore Chapter in 2006.

He created a surgical technique for small vessel anastomosis in arterial surgery and vein patch arterioplasty.

Bell of the national news channel CBS interviewed him about vein valve transplant surgery and his invention, the Rai’s Catheter.

[clarification needed] Rai discovered the motion of venous valves in human beings i.e. its rhythmical opening and closing during each cardiac beat.

He captained the Combined Universities Cricket team of the South Zone of India and Sri Lanka in 1969.

[18] Under the guidance of Indian artist B. Gulam Mahammad, Rai learnt the "India Ink Wash work" technique using a brush.

The portrait he made of then US President John F. Kennedy was based on a photograph by Yousef Karsh.

[19] Rai has also served on the Board and as the Chairman of the Bharatiya Vidya Bhavan United States.

[20][21] He has contributed various articles to the Bhavans Journal - A Travellers Experience,[22] Goddess Kali,[23] Mystery of Om,[24] Gita The Gospel of Krishna,[25] Lingering Feelings,[26] Conversations with Swami Bua, Masters of all Masters, salutations to Sage Kapila,[27] Patanjali’s Ashtanga Yoga.