Allen Derry Pierson

Aug. 1, 1929-Dec. 7, 2020

Posted

Allen Derry Pierson MD, 91, of Fort Collins, died Monday, Dec. 7, 2020. Born in Spencer, Indiana, he was the son of Dr. Robert Harryman and Irene (Derry) Pierson. Allen attended Wabash College, graduating with a B.A. in 1951. He completed his MD at the Indiana University School of Medicine in 1955, interned at Kings County Hospital in Brooklyn, New York, and served in the US Navy Medical Corps as a Seabee Battalion Medical Officer in the Pacific from 1957-1959.

Home from his Navy service, Allen entered general practice in Leadville, Colorado, where he married Marilyn (Greene) Pierson. After completing his anesthesiology residency, he and his family moved to Fort Collins in February of 1966 where he became the first anesthesiologist on the medical staff of Poudre Valley Hospital. He remained with PVH for 21 years, retiring in 1987.

Allen was an avid sailor, skier, hiker and world traveler; a fan of classical music, the Denver Broncos and Colorado Rockies; and a prodigious reader — all passions he pursued for most of his adult life and shared with his children.

A generous and compassionate man, Allen was quick with a smile, and made friends for a lifetime. He was a member of the Foothills Unitarian Church from the late 1970s, where he appreciated the music and a good, challenging sermon.

Surviving are brother Robert (Nancy) Pierson of New York; children, Susan (Michael) Castellon of Fort Collins, Daniel (Carminda) of Wichita, Kansas, and Sarah, also of Fort Collins; step-daughter Anne (Carlos) de Noronha of New York; grandchildren, Nicholas and Caroline Castellon, Remi Pierson and Matthew and Eva de Noronha; 10 nieces and nephews; and his first wife Marilyn Pierson.

He was predeceased by sister Mary Edith Velardi and second wife Marilyn Barnes.

Memorial information at Resthaven, Fort Collins CO. Visit online at www.dignitymemorial.com/obituaries/ft-collins-co/allen-pierson-9935543 to leave condolensces or memories for the family.


X