Leah Miriam Lowenstein (née Hiller; June 17, 1930 – March 6, 1984) was an American nephrologist, academic administrator, and cellist.

Lowenstein was a research associate in the department of anatomy at the University of Oxford for three years, where she earned a DPhil at Somerville College in 1958.

In 1960, she completed a fellowship in renal and metabolic diseases at the Veterans Administration Hospital at Tufts.

[4] According to the archives of the American Society of Nephrology, Lowenstein's group was the first to study cellular mechanisms in metabolic disease.

[4] From 1978 to 1979, she commuted by plane from Boston to Washington, D.C. to serve in the Carter administration as a medical consultant to the Assistant Secretary for Health.

In 1984, John Sandson, dean of the BUSM, called Lowenstein an "outstanding leader" in the field of medicine and praised her work in "science, teaching, administration, and clinical care" along with her contributions that helped to advance "the role of women in medicine.

[7] Lowenstein succeeded interim dean Frank D. Gray Jr. who replaced William Kellow following his death.

[10][1] Lowenstein was a member of the Institute of Medicine and a Fellow of the American Association for the Advancement of Science.

In 1983, she received an alumni award from University of Wisconsin for her service to medicine and medical education, leadership, and commitment to the scientific community.