He served as the second bishop of the Diocese of Udon Thani in the region of Isan, Thailand from 1975 to 2009.
He professed religious vows as a Redemptorist and studied for the priesthood at Immaculate Conception Seminary in Oconomowoc, Wisconsin, USA.
Father Phimphisan served as a priest in the Vice Province of Bangkok until October 2, 1975, when Pope Paul VI named him to be the second bishop of the Diocese of Udon Thani.
[1] Bishop Phimphisan served as the Apostolic Administrator of the Archdiocese of Thare and Nonseng from May 14, 2004, to July 1, 2005.
[3] He served the Diocese of Udon Thani for 34 years as its bishop before his resignation was accepted by Pope Benedict XVI on November 14, 2009.