She continued her studies at the American Conservatory of Music and later studied with Gavin Williamson in harpsichord, Mieczyslaw Horszowski and Leon Fleisher in piano, and with Luciano Berio and Nadia Boulanger.
She wrote music for theatrical productions at Café La Mama and the Arena Stage.
[1] Koston married Dr. Roger L. Shapiro (1927-2002), a research psychiatrist and psychoanalyst.
She suffered from a long illness at the end of her life and died in Washington, D.C.[2] A bequest after her death established the Dina Koston and Roger Shapiro Fund for New Music.
This fund provides for commissions and performance of new music at the Library of Congress in Washington, D.C.[3] Koston composed for a variety of instruments.