S. Epatha Merkerson stars as Sharon Goodwin, the venerable head of Chicago Med who, despite bottom-line pressures from the bureaucrats above, manages to advocate for the doctors in order to provide the best care at the hospital, on NBC’s drama “Chicago Med.”

Merkerson is an accomplished actress who has won critical acclaim for her work in theater, television and film. She is best known for her 17-season run as Lt. Anita Van Buren on NBC’s “Law & Order” where she won three NAACP Image Awards for Outstanding Supporting Actress in a drama.

On television she was a series regul...