Sister Mary Catherine Moan, a member of the Daughters of Charity and retired hospital administrator and teacher, died of heart failure Monday at her order's Emmitsburg retirement home. She was 93.

Born Catherine Elizabeth Moan in Baltimore and raised in Hamilton, she attended St. Dominic's parochial school and was a 1933 Seton High School graduate. She entered the Roman Catholic religious order the next year and later earned a bachelor's degree from the old St. Joseph College in Emmitsburg.

Sister Catherine taught at her order's schools in Portsmouth, Va., and Washington, among other cities, before returning to Baltimore and going into hospital administration. In 1958, she went to St. Agnes Hospital's business office when the institution was adding a large patient building. She learned to read blueprints and checked on its construction. She ordered the furniture and did most of the purchasing for the hospital.

She later worked in administration at hospitals in Detroit, Waterville, Maine, and Norfolk, Va.

From 1977 to 1980, she evaluated the construction and ordered new furnishings at St. Vincent's Child Care Center in Timonium. She then moved to Villa St. Michael in Emmitsburg, where she worked in the library and drove other Daughters of Charity to appointments.

Her brother the Rev. Francis X. Moan of Baltimore, a Jesuit priest, will offer a Mass of Christian burial today at 11 a.m. at the Shrine of St. Elizabeth Ann Seton in Emmitsburg.

Other survivors include another brother, William Moan of Baltimore; a sister, Doris C. Woods of Baltimore; and numerous nieces and nephews.