Working under the auspices of the Hadassah organization, she gave treatment to generations of local children regardless of their parents' religious affiliation.

In 1936, Kagan married Emil Hauser, a violinist who was a member of the Budapest String Quartet and founded the Palestine Conservatory of Music in Jerusalem.

Unable to obtain a license to practice medicine, decided to open a clinic at her home, teaching young Arab and Jewish women to become nurses and midwives.

[3] In 1916, after the last two male physicians were expelled from the city[5] by the Ottoman authorities, and playing a decisive role in containing a cholera epidemic, Kagan was granted an honorary license and started to work at a small children's hospital, becoming the first pediatrician in the country[6] and the only female physician in the Ottoman Empire,[1] running the hospital as the head of its pediatrics wing until 1925.

[4] In the same year, she opened a shelter for homeless children, and a health center in the Old City of Jerusalem for working mothers,[3] the precursor to those known today as Tipat Chalav.