Mac, whose acting credits include the movie "Ocean's 11" and TV's "Bernie Mac Show," died of complications from pneumonia Aug. 9, 2008. He was 50.
In the lawsuit she filed last week in Cook County Circuit Court, McCullough alleges Rene M. Earles kept her husband at his clinic for nine hours July 17, 2008, instead of calling an ambulance to transport him to the hospital when he wasn't feeling well, the Chicago Sun-Times said.
McCullough claims Earles's failure "to recognize cardiopulmonary instability in Bernie" and "to recognize and act upon abnormal vital signs and signs of respiratory failure" set into motion a chain of events that led to Mac dying of pneumonia. McCullough is seeking at least $50,000 in damages.
However, Earles told the newspaper he talked to another of Mac's doctors as soon as he realized the star wasn't well, then sent him for additional treatment to a hospital by chauffeured car when the doctor told him Mac had pneumonia in both of his lungs.
Notable deaths of 2014 [PHOTOS]