Ferebee was instrumental in establishing the Southeast Neighborhood House, an adjunct of the whites-only Friendship House medical center, to provide medical care and other community services to African-Americans in Washington, D.C. She also served as the first medical director for the Mississippi Health Project, which deployed mobile medical units throughout impoverished regions of the deep South. She was the first recipient, in 1959, of Simmons College's Alumnae Achievement Award. The college also awards several scholarships in her name each year.