Dickens offered Barry her kidney after he discussed his health issues with her and other friends during his re-election bid last fall, said Williams.
Dickens and several other willing donors were tested, said Williams. Dickens broke down in tears after learning that she was a match, added Williams.
Barry underwent kidney transplant surgery Friday at Howard University Hospital.
NBC Washington has confirmed that Barry and Dickens are both doing well, according to doctors.
Barry was awake, alert and talking Saturday and should be able to leave the hospital in a week, said Dr. Clive Callender, director of the transplant center at Howard.