M. Augusta Fairchild (c.1834-1923) was born in New Jersey and died in Los Angeles, California. She was a medical doctor who graduated from the New York Hygeio-Therapeutic College, New York, New York, in 1861. After graduating, she worked at the Western Hygeian Home, a hydrotherapy treatment center in St. Anthony's Falls, Minnesota. Afterwards, she practiced medicine in Hannibal, Missouri, and Quincy, Illinois, where she established the Fairchild Sanitarium. It operated until she retired in 1903. Fairchild was also an author, writing on the subject of women's health, with her most notable works being How to be Well (1879) and Woman and Health (1890). She studied Christian Science with Silas J. Sawyer, a student of Mary Baker Eddy's, and her letters indicate that she healed others through what she learned. There is no record of her uniting with the Church of Christ (Scientist).

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