[2] Shellabarger graduated from East High School (Denver) in 1899 and then attended a Special Literary Course at Emerson College of Oratory in Boston, in 1901 and 1902, and a Vocal training at New England Conservatory of Music.
She entered Bellevue Hospital Training School of Nursing in June 1905, graduating in 1908, and Teachers College, Columbia University, in 1916, obtaining a B. S. in 1920.
[2] In 1908, Shellabarger was appointed Junior Supervisor and Instructor in Maternal Medicine at Bellevue Hospital Training School of Nursing.
On the travel back to the United States she was Chief Nurse on the Hospital Ship RMS Saxonia (1899).
In 1919, she was instructor at the Army School of Nursing, Fox Hill, Staten Island, New York.
In 1924, she was Director of the Public Health Nursing Course at the Missouri School of Social Economy in St. Louis.
[1][2] M. Elizabeth Shellabarger lived at Rito Alto Ranch, Moffat, Colorado, and retired to Tempe, Arizona, in the 1950s.
[1][2] At the end of the 19th century Shellabarger was romantically involved with Ralph Wykes Garretson (1878-1903), but he died on September 7, 1903, from a ruptured appendix.
[2] Shellabarger died on June 25, 1967, and was buried, with military honors, at the Santa Fe National Cemetery, New Mexico.