Rai Bahadur Sir Upendranath Brahmachari FRSM FRS (Bengali: উপেন্দ্রনাথ ব্রহ্মচারী; 19 December 1873 – 6 February 1946) was a prominent Indian physician and scientist.
Brahmachari was born on 19 December 1873 in Sardanga village near Purbasthali, District Burdwan, West Bengal, India.
His father, Nilmony Brahmachari, was a physician in East Indian Railways and his mother was Saurabh Sundari Devi.
Brahmachari was awarded the title of Rai Bahadur and the Kaisar-i-Hind Gold Medal, 1st Class, by the Governor General Lord Lytton (1924).
[10] A 6 storey UNB building named after him has been established at Nil Ratan Sircar Medical College and Hospital that houses the Emergency, Medicine, Cardiology and Radiology departments.