Koshi Hospital then called P.Bir 1 Lumber (पी. वीर १ लम्बर) is the first hospital of Nepal. Although Bir Hospital was also established in the same year but Bir Samsher initiated the establishment of hospital from the eastern Nepal on numbering basis so Koshi Hospital was established first.
Book Published by Bir Hospital on the occasion of its 100th year also stated that Koshi Hospital is the oldest hospital of Nepal