The Association of Physicians of India is a professional body of consultant physicians formed in 1944. Its members are physicians with postgraduate qualifications in different specialties. Currently, the membership of the association is 19,500. API West Bengal Branch was born in 1975. The pioneers who played a pivotal role in this regard were the eminent physicians of that time. Prof (Dr) J C Banerjee was the first president, and Prof (Dr) Shyamal Sen was the founder secretary of the Branch. The designation of the president was changed to Chairman in 1994. The API WB Branch office was at 8 Creek Row on a rental basis during its inception. Over time, the members of the Branch decided to have their own office by purchasing a flat at Moon Plaza, 62, Lenin Sarani, 2nd Floor, Flat No-2D, Kolkata 700013, which is the present address of the Chapter. The membership strength is 1095, and the organization is gradually expanding in all directions. Many city branches have, by this time, formed their respective executive bodies under the supervision of the main API West Bengal Chapter at Kolkata. API Siliguri Branch, API Murshidabad City Branch, API Malda City Branch, API Nadia-Kalyani City Branch, API Alipurduar City Branch, and API Cooch Bihar City Branch have already hosted various API activities and CME programs in their respective areas.