[6] He is the current president of the Society for Urologic Robotic Surgeons (SURS) and the Committee Chair of the Prostate Program.

[7] Tewari is a world-leading urological surgeon, and has performed over 10,000 robotically assisted procedures using the da Vinci Surgical System.

For example, Tewari has shown that the operating field has become more visible to the surgeon, unobscured by the copious amounts of blood encountered in traditional surgery and is thus able to view the urological structures under three-dimensional, enlarged magnification.

On 15 October 2013, Tewari was named the chairman of urology at the Icahn School of Medicine at Mount Sinai Hospital in New York City.

[26] He received his training in urology from Sanjay Gandhi Post Graduate Institute of Medical Sciences (SGPGIMS) in India under the mentorship of Professor Mahendra Bhandari and completed the McH and DNB program in 1991.

[27] Tewari has trained in the U.S. at UCSF, University of Florida and at HFHS under Dr. Mani Menon, where was part of the surgical team that performed the first robotic procedure at VUI.

Tewari responded to the COVID-19 crisis in India by rallying together with his team at the Department of Urology, his charitable organization Global Prostate Cancer Research Foundation, and the Mount Sinai Health System leadership, to donate over 450 pallets with over $4 million worth of oxygen concentrators, ventilators, BiPap machines and PPE equipment.

The project, funded through a grant by philanthropist Robert F. Smith, is in response to the higher incidence and mortality of prostate cancer in Black men.

Expected to launch in 2021, the program, headed by Tewari, will partner with local communities and raise prostate cancer awareness.

In May 2023, Tewari was named to Crain's New York Business Journal's 2023 Notable Health Care Leaders list.

This recognition honors individuals in health care who are deemed to be influencing change through their executive responsibility, leadership abilities, medical expertise, achievements, philanthropic endeavors, and innovation.