Dr. Koushik Chatterjee is considered as one of the most eminent oncologist in Kolkata, who is destined to be the Key Opinion Leader in the Oncology Fraternity in West Bengal, if not in India and abroad. He is currently an Assistant Professor, Department of Oncology, in Calcutta PG Hospitals (S.S.K.M), which is the tertiary referral center and the most premier Teaching Hospital in Kolkata. He is seeing his Private patients in the prestigious Belle Vue Clinic, Kolkata, the North City Hospital and Neuro Institute Kolkata, and Kamala Ray Hospital, Hooghly, to name a few of his numerous clinical attachments.